Café com Física São Carlos, 07 th of August/2013. Gregório Couto Faria São Carlos Physics Institute University of São Paulo/Brazil

Size: px
Start display at page:

Download "Café com Física São Carlos, 07 th of August/2013. Gregório Couto Faria São Carlos Physics Institute University of São Paulo/Brazil"

Transcription

1 Café com Física São Carlos, 07 th of August/2013 Gregório Couto Faria São Carlos Physics Institute University of São Paulo/Brazil

2

3

4

5

6

7

8

9 Organic Bioelectronics: Optic Nerve Replace Retina by P3HT/PCBM:

10

11 Safer: Highly toxic organic solvents for solution and synthesis ; Possibility of usage of heteroatom: Se, S, P. S S N N N N Acids are used during synthesis K 2 CO 3, Pd(Ph 3 P) 4 Br M-2 Br Toluene/ H 2 O, 85 o C O O O O n PFeBT O B O O B O Br Se N N M-3 Br K 2 CO 3, Pd(Ph 3 P) 4 Toluene/ H 2 O, 85 o C O O O O Se N N n PFeBSe

12 Cheaper : It is not the price!!! But it initially was 2009: Average price for silicon photovoltaic: 450 /kg!

13 Cheaper : It is not the price!!! But it initially was 2012 China dropped the price to 20 /kg.

14 Yes, OE still presenting great advantages 1) Solution processing: Ease and priceless deposition methods.

15 Yes, OE still presenting great advantages 1) Solution processing: Ease and priceless deposition methods. 2) Flexible Application: Deposition on flexible substrates.

16 Yes, OE still presenting great advantages 1) Solution processing: Ease and priceless deposition methods. 2) Flexible Application: Deposition on flexible substrates. 3) Large area devices: Illumination panel/large area photovoltaic.

17 Yes, OE still presenting great advantages 1) Solution processing: Ease and priceless deposition methods. 2) Flexible Application: Deposition on flexible substrates. 3) Large area devices: Illumination panel/large area photovoltaic. 4) Transparent materials: Windows-lighting application. Yes, OE deserves attention!

18 Origin of bonding and anti-bonding orbital: 6 ev

19 Conjugated systems sp 2 Hybridization

20

21 Overview of recent results obtained at Bernhard Gross Polymer Group

22 Al thermal evaporation Exfoliation by modified Hummer s method: - Graphite (powder) in KMnO 4 /H 2 SO 4 (70 nm, under vacuum) GO spray deposition Al thermal evaporation (70 nm, under vacuum) *Lucas Mouta I (A) I (A) Read "0" Read "1" ON / OFF Ratio *Bruno Torres V (V) 0,0 0,2 0,4 0,6 0,8 1,0 V (V) 0

23 Poly(3-hexylthiophene) Gate Insulator Source Semiconductor Substrate Drain *Josiani Stefanelo

24 I D ( A) 0,2 0,1 0,0-0,1-0,2 V G = 0 V V G = -40 V V D (V) I D (A) 10-6 V D (V) V G (V) on/off ratio μ sat (cm 2 /V.s) Leakage current Spin casting 94 3,6 x *Josiani Stefanelo Inkjet 570 6,5 x

25 How to get white emission? 1) Blending polymer emitting at different colors: Drawback: Right amount of each/learning by doing. Phase separation...

26 How to get white emission? 1) Blending polymer emitting at different colors: Drawback: Right amount of each/learning by doing. Phase separation... 2) Using single device stack with multicolor emitting layers: Drawback: Previously deposited layers are dissolved by subsequent ones!

27 How to get white emission? 1) Blending polymer emitting at different colors: Drawback: Right amount of each/learning by doing. Phase separation... 2) Using single device stack with multicolor emitting layers: Drawback: Previously deposited layers are dissolved by subsequent ones! 3) Synthetizing single molecules that exhibits white emission! Drawback: Extremely challenging!

28 Greenish EL-polymer PFP Red PL-polymer MDMO *Fernando Quites

29 *Fernando Quites

30 Café com Física São Carlos, 07 th of August/2013 Gregório C. Faria (1,2), Eduardo R. deazevedo (1) and Heinz von Seggern (2) (1) São Carlos Physics Institute University of São Paulo/Brazil (2) Institute of Material Science Darmstadt University of Technology/Germany

31 How does CELIV work? Dispersiveness Parameter:

32

33 Full Photo-CELIV response: Extracted Current ( j): Dispersiveness Parameter:

34 Mobility vs. Temperature: Kinks and modulations Is it real? Move to standard techniques

35 Modeling

36 Remarkable similarity Mobility vs. Temperature: Kinks and modulations Why??

37 Polymer Materials has mobile segments: Rich and Unstable Strongly affect its Electrical and Optical Properties

38 Static 1 H NMR Experiment Line Shape Analysis Colaboração: Prof. Eduardo Ribeiro de Azevêdo RMN/IFSC

39 DIPSHIFT Exchange Methods

40 .

41 How is this? Trap Controlled Hopping Hopping is impeded by deep traps

42 How is this? Shallower traps. Trap Controlled Hopping Structural/Motional Detrapping (regime)

43 How is this? Hopping occurs free of traps. Structural/Motional detrapping (regime)

44 Two main relaxation processes: ~ 210 K (β-relaxation) and ~370 K (glass transition); β-relaxation: Side Chain Relaxation/ Glass transition: Main Chain Relaxation Electrical Measurements: strongly influenced by relaxations and crystallization. Interpretation: trapping and detrapping mechanism together with molecular dynamics structural/motional detrapping.

45 Molecular Relaxation detected electrically!! b Relaxation: ~ 210 Kelvins a Relaxation: ~ 380 Kelvins

46 Also, it is very common into the literature: Decided to analyze such futures with more details.

47 Poly(9,9'-dioctylfluorene-co-benzothiadiazole) F8BT Well known material! We want to measure mobility: 4 µm films obtained by Simple Cast Time of Flight Measurements!

48

49 Excitation: 9 ns pulsed laser - λ = 470 nm; Mobility of Holes; E = 0.7 MV/cm

50 Excitation: 9 ns pulsed laser - λ = 470 nm;

51 Are those characteristics due to molecular relaxation/structural transition?

52 Nice correlations with DSC results:

53

54 . j V n Electrical Transport in Solids. With particular reference to organic semiconductors. By K. C. Kao and W. Hwang. σ : Width of the DOS H d : the trap density m = 1 + 2πσ2 16k 2 T 2 1/2 The SCLC regime can be modeled quite well assuming a Gaussian distribution of traps within the forbidden band. J = q 1 m μ p N v 2m + 1 m + 1 m+1 m εε 0 m + 1 H d m V m+1 L 2m+1

55 b Relaxation: Detrapping assisted by the side chain motion!

56 Glass transition: Plateauing of the DOS and Trap-Density increasing! Increasing torsion of the backbone due to T g - New trap states!

57 Crystal-to-Crystal: Fast broadening of the DOS widths; and decreasing of the density of traps. Increasing of crystalline portion: Interface crystal/amorphous broaden the DOS.

58 200 nm 4 µm

59 200 nm 4 µm

60 Faria G.C; deazevedo, E. R.; Seggern, H; - Accepted at Macromolecules, 2013

61

Characterization of electric charge carrier transport in organic semiconductors by time-of-flight technique

Characterization of electric charge carrier transport in organic semiconductors by time-of-flight technique Characterization of electric charge carrier transport in organic semiconductors by time-of-flight technique Raveendra Babu Penumala Mentor: Prof. dr. Gvido Bratina Laboratory of Organic Matter Physics

More information

Semiconductor Polymer

Semiconductor Polymer Semiconductor Polymer Organic Semiconductor for Flexible Electronics Introduction: An organic semiconductor is an organic compound that possesses similar properties to inorganic semiconductors with hole

More information

Organic Electronic Devices

Organic Electronic Devices Organic Electronic Devices Week 5: Organic Light-Emitting Devices and Emerging Technologies Lecture 5.5: Course Review and Summary Bryan W. Boudouris Chemical Engineering Purdue University 1 Understanding

More information

Molecular Electronics For Fun and Profit(?)

Molecular Electronics For Fun and Profit(?) Molecular Electronics For Fun and Profit(?) Prof. Geoffrey Hutchison Department of Chemistry University of Pittsburgh geoffh@pitt.edu July 22, 2009 http://hutchison.chem.pitt.edu Moore s Law: Transistor

More information

Introducing the RoVaCBE Flagship project: Roll-to-roll Vacuum-processed Carbon Based Electronics. Dr Hazel Assender, University of Oxford

Introducing the RoVaCBE Flagship project: Roll-to-roll Vacuum-processed Carbon Based Electronics. Dr Hazel Assender, University of Oxford Introducing the RoVaCBE Flagship project: Roll-to-roll Vacuum-processed Carbon Based Electronics Dr Hazel Assender, University of Oxford DALMATIAN TECHNOLOGY 21 st Sept 2010 1 Organic electronics Opportunity

More information

Metallurgical and Materials Engineering Department MME 2509 Materials Processing Laboratory SOL-GEL DIP COATING

Metallurgical and Materials Engineering Department MME 2509 Materials Processing Laboratory SOL-GEL DIP COATING Metallurgical and Materials Engineering Department MME 2509 Materials Processing Laboratory SOL-GEL DIP COATING Assist. Prof. Dr. Tolga TAVŞANOĞLU 1. Sol-gel Process Sol-gel process is used for production

More information

Development of active inks for organic photovoltaics: state-of-the-art and perspectives

Development of active inks for organic photovoltaics: state-of-the-art and perspectives Development of active inks for organic photovoltaics: state-of-the-art and perspectives Jörg Ackermann Centre Interdisciplinaire de Nanoscience de Marseille (CINAM) CNRS - UPR 3118, MARSEILLE - France

More information

So why is sodium a metal? Tungsten Half-filled 5d band & half-filled 6s band. Insulators. Interaction of metals with light?

So why is sodium a metal? Tungsten Half-filled 5d band & half-filled 6s band. Insulators. Interaction of metals with light? Bonding in Solids: Metals, Insulators, & CHEM 107 T. Hughbanks Delocalized bonding in Solids Think of a pure solid as a single, very large molecule. Use our bonding pictures to try to understand properties.

More information

ORGANIC SEMICONDUCTOR 3,4,9,10-Perylenetetracarboxylic dianhydride (PTCDA)

ORGANIC SEMICONDUCTOR 3,4,9,10-Perylenetetracarboxylic dianhydride (PTCDA) ORGANIC SEMICONDUCTOR 3,4,9,10-Perylenetetracarboxylic dianhydride (PTCDA) Suvranta Tripathy Department of Physics University of Cincinnati Cincinnati, Ohio 45221 March 8, 2002 Abstract In the last decade

More information

ALL-POLYMER FET BASED ON SIMPLE PHOTOLITHOGRAPHIC MICRO-PATTERNING OF ELECTRICALLY CONDUCTING POLYMER

ALL-POLYMER FET BASED ON SIMPLE PHOTOLITHOGRAPHIC MICRO-PATTERNING OF ELECTRICALLY CONDUCTING POLYMER Mol. Cryst. Liq. Cryst., Vol. 405, pp. 171 178, 2003 Copyright # Taylor & Francis Inc. ISSN: 1542-1406 print/1563-5287 online DOI: 10.1080/15421400390263541 ALL-POLYMER FET BASED ON SIMPLE PHOTOLITHOGRAPHIC

More information

Paper presentation. M S Bootha Raju Date: 28/11/09

Paper presentation. M S Bootha Raju Date: 28/11/09 Paper presentation M S Bootha Raju Date: 28/11/09 Photoemission Spectroscopy and Atomic Force Microscopy Investigation of Vapor-Phase Codeposited Silver/Poly(3-hexylthiophene) Composites L. Scudiero, Haoyan

More information

Triplet state diffusion in organometallic and organic semiconductors

Triplet state diffusion in organometallic and organic semiconductors Triplet state diffusion in organometallic and organic semiconductors Prof. Anna Köhler Experimental Physik II University of Bayreuth Germany From materials properties To device applications Organic semiconductors

More information

CHAPTER 3. OPTICAL STUDIES ON SnS NANOPARTICLES

CHAPTER 3. OPTICAL STUDIES ON SnS NANOPARTICLES 42 CHAPTER 3 OPTICAL STUDIES ON SnS NANOPARTICLES 3.1 INTRODUCTION In recent years, considerable interest has been shown on semiconducting nanostructures owing to their enhanced optical and electrical

More information

Electronic Structure and Geometry Relaxation at Excited State

Electronic Structure and Geometry Relaxation at Excited State Electronic Structure and Geometry Relaxation at Excited State Speaker: Chun I Wang ( 王俊壹 ) 2016.07.14 Structure-Performance Relationship Processing schemes Solvent quality Thermal annealing Blend composition

More information

International Journal of Science, Environment and Technology, Vol. 6, No 2, 2017,

International Journal of Science, Environment and Technology, Vol. 6, No 2, 2017, International Journal of Science, Environment and Technology, Vol. 6, No 2, 2017, 1476 1480 ISSN 2278-3687 (O) 2277-663X (P) MORPHOLOGICAL STUDY OF CDSE QUANTUM DOTS IN POLY (3-HEXYLTHIOPHENE)(P3HT) PREPARED

More information

Charge Extraction from Complex Morphologies in Bulk Heterojunctions. Michael L. Chabinyc Materials Department University of California, Santa Barbara

Charge Extraction from Complex Morphologies in Bulk Heterojunctions. Michael L. Chabinyc Materials Department University of California, Santa Barbara Charge Extraction from Complex Morphologies in Bulk Heterojunctions Michael L. Chabinyc Materials Department University of California, Santa Barbara OPVs Vs. Inorganic Thin Film Solar Cells Alta Devices

More information

Supplementary Information. Effect of thermal annealing Super Yellow emissive layer on efficiency of OLEDs

Supplementary Information. Effect of thermal annealing Super Yellow emissive layer on efficiency of OLEDs Supplementary Information Effect of thermal annealing Super Yellow emissive layer on efficiency of OLEDs Samantha Burns 1, Jennifer MacLeod 1,2, Thu Trang Do 1, Prashant Sonar 1, Soniya D. Yambem 1,3,*

More information

Electrochemically Exfoliated Graphene as Solution-Processable, Highly-Conductive Electrodes for Organic Electronics

Electrochemically Exfoliated Graphene as Solution-Processable, Highly-Conductive Electrodes for Organic Electronics Supporting Information Electrochemically Exfoliated Graphene as Solution-Processable, Highly-Conductive Electrodes for Organic Electronics Khaled Parvez, Rongjin Li, Sreenivasa Reddy Puniredd, Yenny Hernandez,

More information

Monolayer Semiconductors

Monolayer Semiconductors Monolayer Semiconductors Gilbert Arias California State University San Bernardino University of Washington INT REU, 2013 Advisor: Xiaodong Xu (Dated: August 24, 2013) Abstract Silicon may be unable to

More information

Supporting Information for. Long-Distance Charge Carrier Funneling in Perovskite Nanowires Enable by Built-in Halide Gradient

Supporting Information for. Long-Distance Charge Carrier Funneling in Perovskite Nanowires Enable by Built-in Halide Gradient Supporting Information for Long-Distance Charge Carrier Funneling in Perovskite Nanowires Enable by Built-in Halide Gradient Wenming Tian, Jing Leng, Chunyi Zhao and Shengye Jin* State Key Laboratory of

More information

Supporting Information

Supporting Information Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2014 Supporting Information High-k Polymer/Graphene Oxide Dielectrics for Low-Voltage Flexible Nonvolatile

More information

Introduction to Nanotechnology Chapter 5 Carbon Nanostructures Lecture 1

Introduction to Nanotechnology Chapter 5 Carbon Nanostructures Lecture 1 Introduction to Nanotechnology Chapter 5 Carbon Nanostructures Lecture 1 ChiiDong Chen Institute of Physics, Academia Sinica chiidong@phys.sinica.edu.tw 02 27896766 Carbon contains 6 electrons: (1s) 2,

More information

Introduction to Nanotechnology Chapter 5 Carbon Nanostructures Lecture 1

Introduction to Nanotechnology Chapter 5 Carbon Nanostructures Lecture 1 Introduction to Nanotechnology Chapter 5 Carbon Nanostructures Lecture 1 ChiiDong Chen Institute of Physics, Academia Sinica chiidong@phys.sinica.edu.tw 02 27896766 Section 5.2.1 Nature of the Carbon Bond

More information

Photovoltage phenomena in nanoscaled materials. Thomas Dittrich Hahn-Meitner-Institute Berlin

Photovoltage phenomena in nanoscaled materials. Thomas Dittrich Hahn-Meitner-Institute Berlin Photovoltage phenomena in nanoscaled materials Thomas Dittrich Hahn-Meitner-Institute Berlin 1 2 Introduction From bulk to nanostructure: SPV on porous Si Retarded SPV response and its origin Photovoltage

More information

2D MBE Activities in Sheffield. I. Farrer, J. Heffernan Electronic and Electrical Engineering The University of Sheffield

2D MBE Activities in Sheffield. I. Farrer, J. Heffernan Electronic and Electrical Engineering The University of Sheffield 2D MBE Activities in Sheffield I. Farrer, J. Heffernan Electronic and Electrical Engineering The University of Sheffield Outline Motivation Van der Waals crystals The Transition Metal Di-Chalcogenides

More information

Supporting Information: Poly(dimethylsiloxane) Stamp Coated with a. Low-Surface-Energy, Diffusion-Blocking,

Supporting Information: Poly(dimethylsiloxane) Stamp Coated with a. Low-Surface-Energy, Diffusion-Blocking, Supporting Information: Poly(dimethylsiloxane) Stamp Coated with a Low-Surface-Energy, Diffusion-Blocking, Covalently Bonded Perfluoropolyether Layer and Its Application to the Fabrication of Organic Electronic

More information

Solutions for Assignment-8

Solutions for Assignment-8 Solutions for Assignment-8 Q1. The process of adding impurities to a pure semiconductor is called: [1] (a) Mixing (b) Doping (c) Diffusing (d) None of the above In semiconductor production, doping intentionally

More information

Plastic Electronics. Joaquim Puigdollers.

Plastic Electronics. Joaquim Puigdollers. Plastic Electronics Joaquim Puigdollers Joaquim.puigdollers@upc.edu Nobel Prize Chemistry 2000 Origins Technological Interest First products.. MONOCROMATIC PHILIPS Today Future Technological interest Low

More information

J. Price, 1,2 Y. Q. An, 1 M. C. Downer 1 1 The university of Texas at Austin, Department of Physics, Austin, TX

J. Price, 1,2 Y. Q. An, 1 M. C. Downer 1 1 The university of Texas at Austin, Department of Physics, Austin, TX Understanding process-dependent oxygen vacancies in thin HfO 2 /SiO 2 stacked-films on Si (100) via competing electron-hole injection dynamic contributions to second harmonic generation. J. Price, 1,2

More information

Supporting Information

Supporting Information Supporting Information Oh et al. 10.1073/pnas.0811923106 SI Text Hysteresis of BPE-PTCDI MW-TFTs. Fig. S9 represents bidirectional transfer plots at V DS 100VinN 2 atmosphere for transistors constructed

More information

Beads-On-String-Shaped Poly(azomethine) Applicable for Solution Processing of Bilayer. Devices using a Same Solvent

Beads-On-String-Shaped Poly(azomethine) Applicable for Solution Processing of Bilayer. Devices using a Same Solvent Supporting information Beads-n-String-Shaped Poly(azomethine) Applicable for Solution Processing of Bilayer Devices using a Same Solvent Shunichi Fujii, Saori Minami, Kenji Urayama, Yu Suenaga, Hiroyoshi

More information

Observation of electron injection in an organic field-effect transistor with electroluminescence *

Observation of electron injection in an organic field-effect transistor with electroluminescence * Materials Science-Poland, Vol. 27, No. 3, 2009 Observation of electron injection in an organic field-effect transistor with electroluminescence * Y. OHSHIMA **, H. KOHN, E. LIM, T. MANAKA, M. IWAMOTO Department

More information

Solid State Device Fundamentals

Solid State Device Fundamentals Solid State Device Fundamentals ENS 345 Lecture Course by Alexander M. Zaitsev alexander.zaitsev@csi.cuny.edu Tel: 718 982 2812 Office 4N101b 1 Outline - Goals of the course. What is electronic device?

More information

Imaging Methods: Scanning Force Microscopy (SFM / AFM)

Imaging Methods: Scanning Force Microscopy (SFM / AFM) Imaging Methods: Scanning Force Microscopy (SFM / AFM) The atomic force microscope (AFM) probes the surface of a sample with a sharp tip, a couple of microns long and often less than 100 Å in diameter.

More information

7 Conjugated Polymers

7 Conjugated Polymers 7 Conjugated Polymers The large majority of polymers, first of all the broadly used commodity materials polyethylene, polypropylene, poly(ethylene terephthalate) or polystyrene, have similar electrical

More information

Keywords: thin-film transistors, organic polymers, bias temperature stress, electrical instabilities, transient regime.

Keywords: thin-film transistors, organic polymers, bias temperature stress, electrical instabilities, transient regime. Time dependence of organic polymer thin-film transistors current Sandrine Martin *, Laurence Dassas, Michael C. Hamilton and Jerzy Kanicki University of Michigan, Solid-State Electronics Laboratory, Department

More information

Transparent TiO 2 nanotube/nanowire arrays on TCO coated glass substrates: Synthesis and application to solar energy conversion

Transparent TiO 2 nanotube/nanowire arrays on TCO coated glass substrates: Synthesis and application to solar energy conversion Transparent TiO 2 nanotube/nanowire arrays on TCO coated glass substrates: Synthesis and application to solar energy conversion Craig A. Grimes Department of Electrical Engineering Center for Solar Nanomaterials

More information

Improving Efficiency and Reproducibility of Perovskite Solar Cells through Aggregation Control in Polyelectrolytes Hole Transport Layer

Improving Efficiency and Reproducibility of Perovskite Solar Cells through Aggregation Control in Polyelectrolytes Hole Transport Layer Supporting Information Improving Efficiency and Reproducibility of Perovskite Solar Cells through Aggregation Control in Polyelectrolytes Hole Transport Layer Xiaodong Li, a Ying-Chiao Wang, a Liping Zhu,

More information

HomoOPV - High Efficiency Homojunction Organic Photovoltaics

HomoOPV - High Efficiency Homojunction Organic Photovoltaics HomoOPV - High Efficiency Homojunction Organic Photovoltaics Sebastian Dunst 1, Gregor Trimmel 1, Mihai Irimia-Vladu 2 1 Technische Universität Graz, Institut für Chemische Technologie von Materialien

More information

Physics of Organic Semiconductor Devices: Materials, Fundamentals, Technologies and Applications

Physics of Organic Semiconductor Devices: Materials, Fundamentals, Technologies and Applications Physics of Organic Semiconductor Devices: Materials, Fundamentals, Technologies and Applications Dr. Alex Zakhidov Assistant Professor, Physics Department Core faculty at Materials Science, Engineering

More information

Novel Soft Materials: Organic Semiconductors

Novel Soft Materials: Organic Semiconductors JSPS Science Dialogue Novel Soft Materials: Organic Semiconductors X.T. HAO Prof. UENO s Lab Faculty of Engineering, Chiba University 21 st Century Center of Excellence Program The route to research Transparent

More information

Electronic Supplementary Information. inverted organic solar cells, towards mass production

Electronic Supplementary Information. inverted organic solar cells, towards mass production Electronic Supplementary Material (ESI) for Journal of Materials Chemistry A. This journal is The Royal Society of Chemistry 2018 Electronic Supplementary Information Polyelectrolyte interlayers with a

More information

Dielectric materials for Organic Thin-Film Transistors

Dielectric materials for Organic Thin-Film Transistors Dielectric materials for Organic Thin-Film Transistors Arinola Awomolo University of Illinois Chicago Advisors: : Prof. Christos Takoudis, Prof. Greg Jursich Graduate Research Assistant: Lin Jiang Motorola

More information

Lecture 8 Organic Semiconductors

Lecture 8 Organic Semiconductors Lecture 8 Organic Semiconductors 1/78 Announcements omework 1/4: Pick it up from me today. The solutions will be online later today. omework 2/4: Is online now. Due Thursday October 18 th at the start

More information

Enhanced Optical and Electrical Properties of Organic Field Effect Transistor using Metal Nanoparticles

Enhanced Optical and Electrical Properties of Organic Field Effect Transistor using Metal Nanoparticles University of Miami Scholarly Repository Open Access Theses Electronic Theses and Dissertations 2014-07-28 Enhanced Optical and Electrical Properties of Organic Field Effect Transistor using Metal Nanoparticles

More information

Luminescence. Photoluminescence (PL) is luminescence that results from optically exciting a sample.

Luminescence. Photoluminescence (PL) is luminescence that results from optically exciting a sample. Luminescence Topics Radiative transitions between electronic states Absorption and Light emission (spontaneous, stimulated) Excitons (singlets and triplets) Franck-Condon shift(stokes shift) and vibrational

More information

Electrical characterization of polymer ferroelectric diodes

Electrical characterization of polymer ferroelectric diodes Electrical characterization of polymer ferroelectric diodes Reza Saberi Moghaddam July 2010 Supervisors: Prof. Dr. Dago. M. de Leeuw Prof. Dr. Ir. P. W. M. Blom Dr. K. Asadi Molecular Electronics, Physics

More information

Engineering Challenges in Quantum Dot Displays

Engineering Challenges in Quantum Dot Displays Engineering Challenges in Quantum Dot Displays Any great technology that pushes the boundaries of performance also has a set of challenges to overcome. Quantum dot displays are not an exception. Whether

More information

Organic LEDs part 8. Exciton Dynamics in Disordered Organic Thin Films. Handout on QD-LEDs: Coe et al., Nature 420, 800 (2002).

Organic LEDs part 8. Exciton Dynamics in Disordered Organic Thin Films. Handout on QD-LEDs: Coe et al., Nature 420, 800 (2002). Organic LEDs part 8 Exciton Dynamics in Disordered Organic Thin Films Quantum Dot LEDs Handout on QD-LEDs: Coe et al., ature 420, 800 (2002). @ MIT April 29, 2003 Organic Optoelectronics - Lecture 20b

More information

Towards a deeper understanding of polymer solar cells

Towards a deeper understanding of polymer solar cells Towards a deeper understanding of polymer solar cells Jan Anton Koster Valentin Mihailetchi Prof. Paul Blom Molecular Electronics Zernike Institute for Advanced Materials and DPI University of Groningen

More information

Seminars in Nanosystems - I

Seminars in Nanosystems - I Seminars in Nanosystems - I Winter Semester 2011/2012 Dr. Emanuela Margapoti Emanuela.Margapoti@wsi.tum.de Dr. Gregor Koblmüller Gregor.Koblmueller@wsi.tum.de Seminar Room at ZNN 1 floor Topics of the

More information

Electronic Supporting Information

Electronic Supporting Information Electronic Supporting Information Naphtho[1,2-c:5,6-c ]bis[1,2,5]thiadiazole-based Nonfullerene Acceptors: Effect of Substituents on the Thiophene Unit on Properties and Photovoltaic Characteristics Shreyam

More information

Supplementary Figure 1 XRD pattern of a defective TiO 2 thin film deposited on an FTO/glass substrate, along with an XRD pattern of bare FTO/glass

Supplementary Figure 1 XRD pattern of a defective TiO 2 thin film deposited on an FTO/glass substrate, along with an XRD pattern of bare FTO/glass Supplementary Figure 1 XRD pattern of a defective TiO 2 thin film deposited on an FTO/glass substrate, along with an XRD pattern of bare FTO/glass and a reference pattern of anatase TiO 2 (JSPDS No.: 21-1272).

More information

The Study of Charge Carrier Transports in the Calamitic Liquid Crystals 5, 5 -di-(decyl-pyridin-yl) - 2 Bithiophene.

The Study of Charge Carrier Transports in the Calamitic Liquid Crystals 5, 5 -di-(decyl-pyridin-yl) - 2 Bithiophene. The Study of Charge Carrier Transports in the Calamitic Liquid Crystals 5, 5 -di-(decyl-pyridin-yl) - 2 Bithiophene Naresh Shakya * C. Pokhrel* and B. Ellman* Y. Getmanenko** and R. J. Twieg** *Department

More information

Opto-electronic Characterization of Perovskite Thin Films & Solar Cells

Opto-electronic Characterization of Perovskite Thin Films & Solar Cells Opto-electronic Characterization of Perovskite Thin Films & Solar Cells Arman Mahboubi Soufiani Supervisors: Prof. Martin Green Prof. Gavin Conibeer Dr. Anita Ho-Baillie Dr. Murad Tayebjee 22 nd June 2017

More information

Dielectric constant measurement of P3HT, polystyrene, and polyethylene

Dielectric constant measurement of P3HT, polystyrene, and polyethylene Dielectric constant measurement of P3HT, polystyrene, and polyethylene Supervisor: prof. dr. J.C. Hummelen Daily supervisor: Jenny Douvogianni Name: Si Chen (s2660482) 1. Introduction Dielectric constant

More information

Limit of Field Effect Mobility on Pentacene Single Crystal

Limit of Field Effect Mobility on Pentacene Single Crystal Limit of Field Effect Mobility on Pentacene Single Crystal V.Y. Butko*, X. Chi, D. V. Lang and A. P. Ramirez Los Alamos National Laboratory, Los Alamos, New Mexico, USA We report on fabrication and characterization

More information

High-Performance Semiconducting Polythiophenes for Organic Thin Film. Transistors by Beng S. Ong,* Yiliang Wu, Ping Liu and Sandra Gardner

High-Performance Semiconducting Polythiophenes for Organic Thin Film. Transistors by Beng S. Ong,* Yiliang Wu, Ping Liu and Sandra Gardner Supplementary Materials for: High-Performance Semiconducting Polythiophenes for Organic Thin Film Transistors by Beng S. Ong,* Yiliang Wu, Ping Liu and Sandra Gardner 1. Materials and Instruments. All

More information

Enhancing the Performance of Organic Thin-Film Transistor using a Buffer Layer

Enhancing the Performance of Organic Thin-Film Transistor using a Buffer Layer Proceedings of the 9th International Conference on Properties and Applications of Dielectric Materials July 19-23, 29, Harbin, China L-7 Enhancing the Performance of Organic Thin-Film Transistor using

More information

Supplementary Figures:

Supplementary Figures: Supplementary Figures: dcdtbt vibration spectrum: Ground state blue vs Cation state red Intensity a.u. 1000 1100 1200 1300 1400 1500 1600 1700 Frequency cm^1 dcdtbt vibration spectrum: Ground state blue

More information

a-igzo TFT Simulation

a-igzo TFT Simulation Engineered Excellence A Journal for Process and Device Engineers a-igzo TFT Simulation 1. Introduction The flat panel device for active matrix liquid crystal displays (AMLCDs and active matrix organic

More information

Defects in Semiconductors

Defects in Semiconductors Defects in Semiconductors Mater. Res. Soc. Symp. Proc. Vol. 1370 2011 Materials Research Society DOI: 10.1557/opl.2011. 771 Electronic Structure of O-vacancy in High-k Dielectrics and Oxide Semiconductors

More information

Supplementary Information Our InGaN/GaN multiple quantum wells (MQWs) based one-dimensional (1D) grating structures

Supplementary Information Our InGaN/GaN multiple quantum wells (MQWs) based one-dimensional (1D) grating structures Polarized white light from hybrid organic/iii-nitrides grating structures M. Athanasiou, R. M. Smith, S. Ghataora and T. Wang* Department of Electronic and Electrical Engineering, University of Sheffield,

More information

Introduction. Fang-Chung Chen Department of Photonics and Display Institute National Chiao Tung University. Organic light-emitting diodes

Introduction. Fang-Chung Chen Department of Photonics and Display Institute National Chiao Tung University. Organic light-emitting diodes rganic light-emitting diodes Introduction Fang-Chung Chen Department of Photonics and Display Institute National Chiao Tung University rganic light-emitting diodes --The emerging technology LED Displays

More information

Mini-project report. Organic Photovoltaics. Rob Raine

Mini-project report. Organic Photovoltaics. Rob Raine Mini-project report Organic Photovoltaics Rob Raine dtp11rdr@sheffield.ac.uk 10/2/2012 ASSIGNMENT COVER SHEET 2010/2011 A completed copy of this sheet MUST be attached to coursework contributing towards

More information

Supplementary Figure 1. Cross-section SEM image of the polymer scaffold perovskite film using MAI:PbI 2 =1:1 in DMF solvent on the FTO/glass

Supplementary Figure 1. Cross-section SEM image of the polymer scaffold perovskite film using MAI:PbI 2 =1:1 in DMF solvent on the FTO/glass Supplementary Figure 1. Cross-section SEM image of the polymer scaffold perovskite film using MAI:PbI 2 =1:1 in DMF solvent on the FTO/glass substrate. Scale bar: 1 m. Supplementary Figure 2. Contact angle

More information

Light Emitting Diodes

Light Emitting Diodes Light Emitting Diodes WWW.LIGHTEMITTINGDIODES.ORG OPTI 500 A FALL 2012, LECTURE 8 Light Emission from Semiconductor Spontaneous radiative transition in direct bandgap semiconductors generate light ~ E

More information

High Performance, Low Operating Voltage n-type Organic Field Effect Transistor Based on Inorganic-Organic Bilayer Dielectric System

High Performance, Low Operating Voltage n-type Organic Field Effect Transistor Based on Inorganic-Organic Bilayer Dielectric System Journal of Physics: Conference Series PAPER OPEN ACCESS High Performance, Low Operating Voltage n-type Organic Field Effect Transistor Based on Inorganic-Organic Bilayer Dielectric System To cite this

More information

Supplementary Materials

Supplementary Materials Supplementary Materials Sample characterization The presence of Si-QDs is established by Transmission Electron Microscopy (TEM), by which the average QD diameter of d QD 2.2 ± 0.5 nm has been determined

More information

High speed vacuum deposition of organic TFTs in a roll-to-roll facility

High speed vacuum deposition of organic TFTs in a roll-to-roll facility High speed vacuum deposition of organic TFTs in a roll-to-roll facility Dr Hazel Assender University of Oxford 1 Prof Martin Taylor Eifion Patchett, Aled Williams Prof Long Lin Prof Steve Yeates Dr John

More information

Graphene. Tianyu Ye November 30th, 2011

Graphene. Tianyu Ye November 30th, 2011 Graphene Tianyu Ye November 30th, 2011 Outline What is graphene? How to make graphene? (Exfoliation, Epitaxial, CVD) Is it graphene? (Identification methods) Transport properties; Other properties; Applications;

More information

OLEDs and PLEDs Nele Schumacher Incoherent Lightsources - Prof. Thomas Jüstel

OLEDs and PLEDs Nele Schumacher Incoherent Lightsources - Prof. Thomas Jüstel OLEDs and PLEDs 28.5.2014 Nele Schumacher Incoherent Lightsources - Prof. Thomas Jüstel Contents 1. History 2. Working principle 4. Preparation of multilayer devices 5. Advantages and disadvantages 6.

More information

Chapter 4 Scintillation Detectors

Chapter 4 Scintillation Detectors Med Phys 4RA3, 4RB3/6R03 Radioisotopes and Radiation Methodology 4-1 4.1. Basic principle of the scintillator Chapter 4 Scintillation Detectors Scintillator Light sensor Ionizing radiation Light (visible,

More information

Structure Property Relationships of. Organic Light-Emitting Diodes. Michael Kochanek May 19, 2006 MS&E 542 Flexible Electronics

Structure Property Relationships of. Organic Light-Emitting Diodes. Michael Kochanek May 19, 2006 MS&E 542 Flexible Electronics Structure Property Relationships of Organic Light-Emitting Diodes Michael Kochanek May 19, 2006 MS&E 542 Flexible Electronics Introduction Many of today s solid-state inorganic microelectronic devices

More information

All-inkjet printed electronic circuits: Dielectrics and surface passivation techniques for improved operational stability and lifetime

All-inkjet printed electronic circuits: Dielectrics and surface passivation techniques for improved operational stability and lifetime All-inkjet printed electronic circuits: Dielectrics and surface passivation techniques for improved operational stability and lifetime M. C. R. Medeiros 1, F. Villani 2, A. T. Negrier 3, F. Loffredo 2,

More information

Mesoporous titanium dioxide electrolyte bulk heterojunction

Mesoporous titanium dioxide electrolyte bulk heterojunction Mesoporous titanium dioxide electrolyte bulk heterojunction The term "bulk heterojunction" is used to describe a heterojunction composed of two different materials acting as electron- and a hole- transporters,

More information

Supplementary Figure S1. AFM images of GraNRs grown with standard growth process. Each of these pictures show GraNRs prepared independently,

Supplementary Figure S1. AFM images of GraNRs grown with standard growth process. Each of these pictures show GraNRs prepared independently, Supplementary Figure S1. AFM images of GraNRs grown with standard growth process. Each of these pictures show GraNRs prepared independently, suggesting that the results is reproducible. Supplementary Figure

More information

Electronic Supplementary Information. Highly Efficient Deep-Blue Emitting Organic Light Emitting Diode Based on the

Electronic Supplementary Information. Highly Efficient Deep-Blue Emitting Organic Light Emitting Diode Based on the Electronic Supplementary Information Highly Efficient Deep-Blue Emitting rganic Light Emitting Diode Based on the Multifunctional Fluorescent Molecule Comprising Covalently Bonded Carbazole and Anthracene

More information

Chemistry Instrumental Analysis Lecture 8. Chem 4631

Chemistry Instrumental Analysis Lecture 8. Chem 4631 Chemistry 4631 Instrumental Analysis Lecture 8 UV to IR Components of Optical Basic components of spectroscopic instruments: stable source of radiant energy transparent container to hold sample device

More information

Effect of Illumination on Organic Polymer Thin-Film Transistors

Effect of Illumination on Organic Polymer Thin-Film Transistors Mat. Res. Soc. Symp. Proc. Vol. 771 2003 Materials Research Society L10.17.1 Effect of Illumination on Organic Polymer Thin-Film Transistors Michael C. Hamilton, Sandrine Martin, and Jerzy Kanicki 1 Solid-State

More information

Supplementary material for High responsivity mid-infrared graphene detectors with antenna-enhanced photo-carrier generation and collection

Supplementary material for High responsivity mid-infrared graphene detectors with antenna-enhanced photo-carrier generation and collection Supplementary material for High responsivity mid-infrared graphene detectors with antenna-enhanced photo-carrier generation and collection Yu Yao 1, Raji Shankar 1, Patrick Rauter 1, Yi Song 2, Jing Kong

More information

Secondary Ion Mass Spectroscopy (SIMS)

Secondary Ion Mass Spectroscopy (SIMS) Secondary Ion Mass Spectroscopy (SIMS) Analyzing Inorganic Solids * = under special conditions ** = semiconductors only + = limited number of elements or groups Analyzing Organic Solids * = under special

More information

Resonant photo-ionization of point defects in HfO 2 thin films observed by second-harmonic generation.

Resonant photo-ionization of point defects in HfO 2 thin films observed by second-harmonic generation. Optics of Surfaces & Interfaces - VIII September 10 th, 2009 Resonant photo-ionization of point defects in HfO 2 thin films observed by second-harmonic generation. Jimmy Price and Michael C. Downer Physics

More information

ET3034TUx Utilization of band gap energy

ET3034TUx Utilization of band gap energy ET3034TUx - 3.3.1 - Utilization of band gap energy In the last two weeks we have discussed the working principle of a solar cell and the external parameters that define the performance of a solar cell.

More information

Transient Photocurrent Measurements of Graphene Related Materials

Transient Photocurrent Measurements of Graphene Related Materials Transient Photocurrent Measurements of Graphene Related Materials P. Srinivasa Rao Mentor: Prof. dr. Gvido Bratina Laboratory of Organic Matter Physics University of Nova Gorica 1 Contents: 1. Electrical

More information

Optical and Photonic Glasses. Lecture 30. Femtosecond Laser Irradiation and Acoustooptic. Professor Rui Almeida

Optical and Photonic Glasses. Lecture 30. Femtosecond Laser Irradiation and Acoustooptic. Professor Rui Almeida Optical and Photonic Glasses : Femtosecond Laser Irradiation and Acoustooptic Effects Professor Rui Almeida International Materials Institute For New Functionality in Glass Lehigh University Femto second

More information

UNIVERSITY OF CALIFORNIA College of Engineering Department of Electrical Engineering and Computer Sciences. Fall Exam 1

UNIVERSITY OF CALIFORNIA College of Engineering Department of Electrical Engineering and Computer Sciences. Fall Exam 1 UNIVERSITY OF CALIFORNIA College of Engineering Department of Electrical Engineering and Computer Sciences EECS 143 Fall 2008 Exam 1 Professor Ali Javey Answer Key Name: SID: 1337 Closed book. One sheet

More information

Mass Determination of Rn and Hg isotopes using MASHA

Mass Determination of Rn and Hg isotopes using MASHA Mass Determination of Rn and Hg isotopes using MASHA Alfred M. Sehone Lumkile Msebi Oleg Lishyk Stanislav Stanishevski Yuliya Brechko Supervisor Krupa Lubosh Flerov Laboratory of Nuclear reactions, JINR,

More information

Nanoparticle Memories: CMOS, Organic and Hybrid approaches

Nanoparticle Memories: CMOS, Organic and Hybrid approaches Nanoparticle Memories: CMOS, Organic and Hybrid approaches Panagiotis Dimitrakis, Ph.D IMEL/NCSR Demokritos Winter School on Nanoelectronic and Nanophotonics Bilkent University Ankara, Turkey 19-25 January

More information

Electrons are shared in covalent bonds between atoms of Si. A bound electron has the lowest energy state.

Electrons are shared in covalent bonds between atoms of Si. A bound electron has the lowest energy state. Photovoltaics Basic Steps the generation of light-generated carriers; the collection of the light-generated carriers to generate a current; the generation of a large voltage across the solar cell; and

More information

ELECTRICAL PROPERTIES OF PENTACENE FILMS OBTAINED BY PULSED LASER DEPOSITION

ELECTRICAL PROPERTIES OF PENTACENE FILMS OBTAINED BY PULSED LASER DEPOSITION Electrical Rev.Adv.Mater.Sci. properties 23(2010) of pentacene 229-233 films obtained by pulsed laser deposition 229 ELECTRICAL PROPERTIES OF PENTACENE FILMS OBTAINED BY PULSED LASER DEPOSITION G.Wisz

More information

Synthesis Breakout. Overarching Issues

Synthesis Breakout. Overarching Issues Synthesis Breakout. Overarching Issues 1. What are fundamental structural and electronic factors limiting Jsc, Voc, and FF in typical polymer bulk-heterojunction cells? Rational P- and N-type materials

More information

REDUCED GRAPHITE OXIDE-INDIUM TIN OXIDE COMPOSITES FOR TRANSPARENT ELECTRODE USING SOLUTION PROCESS

REDUCED GRAPHITE OXIDE-INDIUM TIN OXIDE COMPOSITES FOR TRANSPARENT ELECTRODE USING SOLUTION PROCESS 18 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS REDUCED GRAPHITE OXIDE-INDIUM TIN OXIDE COMPOSITES FOR TRANSPARENT ELECTRODE USING SOLUTION PROCESS K. S. Choi, Y. Park, K-.C. Kwon, J. Kim, C. K.

More information

Applications of lasers M. Rudan

Applications of lasers M. Rudan ELECTROMAGNETIC SPECTRUM LASER (Zanichelli, 1999), p. 17. HETEROSTRUCTURE LASER LASER (Zanichelli, 1999), p. 103. FUNDAMENTAL SCIENCE (I) The laser emission is monochromatic and has a high brightness.

More information

Two-Dimensional CH 3 NH 3 PbI 3 Perovskite: Synthesis and Optoelectronic Application

Two-Dimensional CH 3 NH 3 PbI 3 Perovskite: Synthesis and Optoelectronic Application Two-Dimensional CH 3 NH 3 PbI 3 Perovskite: Synthesis and Optoelectronic Application Jingying Liu,, Yunzhou Xue,,, Ziyu Wang,, Zai-Quan Xu, Changxi Zheng, Bent Weber, Jingchao Song, Yusheng Wang, Yuerui

More information

Organic Device Simulation Using Silvaco Software. Silvaco Taiwan September 2005

Organic Device Simulation Using Silvaco Software. Silvaco Taiwan September 2005 Organic Device Simulation Using Silvaco Software Silvaco Taiwan September 2005 Organic Devices Simulation: Contents Introduction Silvaco TCAD Simulator Theory Models OTFT Simulation v.s Measurement OLED

More information

Organic solar cells. State of the art and outlooks. Gilles Horowitz LPICM, UMR7647 CNRS - Ecole Polytechnique

Organic solar cells. State of the art and outlooks. Gilles Horowitz LPICM, UMR7647 CNRS - Ecole Polytechnique Organic solar cells. State of the art and outlooks Gilles Horowitz LPICM, UMR7647 CNRS - Ecole Polytechnique Solar energy Solar energy on earth: 75,000 tep/year 6000 times the world consumption in 2007

More information

3.1 Introduction to Semiconductors. Y. Baghzouz ECE Department UNLV

3.1 Introduction to Semiconductors. Y. Baghzouz ECE Department UNLV 3.1 Introduction to Semiconductors Y. Baghzouz ECE Department UNLV Introduction In this lecture, we will cover the basic aspects of semiconductor materials, and the physical mechanisms which are at the

More information

Chapter 12 - Modern Materials

Chapter 12 - Modern Materials Chapter 12 - Modern Materials 12.1 Semiconductors Inorganic compounds that semiconduct tend to have chemical formulas related to Si and Ge valence electron count of four. Semiconductor conductivity can

More information

Semiconductor Nanocrystals from Nonthermal Plasmas. Rebecca J. Anthony University of Minnesota

Semiconductor Nanocrystals from Nonthermal Plasmas. Rebecca J. Anthony University of Minnesota Semiconductor Nanocrystals from Nonthermal Plasmas Rebecca J. Anthony University of Minnesota 1 Nanocrystals in devices efficient light emitters and absorbers versatile deposition schemes possibility for

More information