Physics of Organic Semiconductors
|
|
- Claribel Osborne
- 6 years ago
- Views:
Transcription
1 Physics of Organic Semiconductors Edited by Wolfgang Brüning WI LEY- VCH WI LEY-VCH Verlag GmbH 8e, Co. KGaA
2 I v Contents List of Contributors XV Introduction to the Physics of Organic Semiconductors 1 W. Brütting 1 History 1 2 Materials 2 3 Basic Properties of Organic Semiconductors Optical Properties Charge Carrier Transport Device Structures and Properties 9 4 Outline of this Book 12 Part I Growth and Interfaces 15 1 Organic Molecular Beam Deposition: Growth Studies beyond the First Monolayer 17 F. Schreiber 1.1 Introduction Organic molecular beam deposition General concepts of thin film grovvth Issues specific to organic thin film growth Overview of popular OMBD systems Films on mddized silicon PTCDA DIP Phthalocyanines Pentacene Films on aluminium oxide PTCDA DIP Phthalocyanines Pentacene 29
3 VII Contents 1.5 Films on metals PTCDA Structure and epitaxy of PTCDA/Ag(111) Comparison with other substrates Dewetting and thermal properties Real-time growth DIP Phthalocyanines Pentacene Films on other substrates More complex heterostructures and technical interfaces Summary and Conclusions 37 2 Electronic Properties of Interfaces between Model Organic Semiconductors and Metals 41 M. Knupfer and H. Peisert 2.1 Introduction Experimental methods Photoemission spectroscopy Polarization dependent XAS Adsorption geometry and substrate roughness Organic/metal interfaces: general properties and trends Reactive surfaces: indium-tin oxide and PEDOT:PSS Concluding remarks 64 3 Kelvin Probe Study of Band Bending at Organic Semiconductor/Metal Interfaces: Examination of Fermi Level Alignment 69 H. Ishii, N. Hayashi, E.!to, Y. Washizu, K. Sugi, Y. Kimura, M. Niwano, 0. Ouchi, and K. Seki 3.1 Introduction Energy level alignment at organic/metal interfaces Basic aspects of band bending Band bending in thermal equilibrium Band bending in nonequilibrium KP measurements for insulating surface Experimental Results ans Discussion C60/metal interface: case of band bending TPD/metal interface: case for no band bending Potential gradient built in A1q3 film Concluding Remarks 90
4 4 Thermal and Struc-tural Properties of the Organic Semiconductor A1q3 and Characterization of its Excited Electronic Triplet State 95 M. Cölle and W. Brütting 4.1 Introduction Crystalline Phases of Alcb Thermal Properties of Alq The Molecular Structure of (1: Alq High resolution powder diffraction using synchrotron radiation Vibrational Analysis Population and properties of the electronic excited triplet state Population of the triplet states Phosphorescence of Alq Summary 125 Contents I VII Part II Photophysics Ultrafast Photophysics in Conjugated Polymers 131 G. Lanzani, G. Cerullo, D. Polli, A. Gambetta, M. Zavelani - Rossi, C. Gadermaier 5.1 Introduction Femtosecond laser systems The pump-probe experiment Coherent vibrational spectroscopy Vibrational relaxation Electronic relaxation Triplet and soliton pairs Charge state dynamics A brief overview about charge photogeneration Field-assisted pump-probe spectroscopy The role of higher-lying states Conclusion The Origin of the Green Emission Band in PolyFluorene Type Polymers Gamerith, C. Gadermaier, U. Schetf, E.J. W List 6.1 Introduction Photo-physical Properties of Polyfluorene-type Polymers Optical properties of pristine polyfluorenes Optical properties of polyfluorenes in the ö-phase Fluorescent on chain defects in polyfluorene-type polymers Formation of keto-type defects in PF-type polymers The formation of keto defects during the synthesis Formation of keto defects during thermal degradation Formation of keto defects due to photo-oxidative degradation The origin of the green emission band at ev 166
5 VIII I Contents Degradation in polyfluorene-based electroluminescent devices Conclusion Exciton Energy Relaxation and Dissociation in Pristine and Doped Conjugated Polymers 183 V. 1. Arkhipov and H. Bässler 7.1 Introduction Field-induced exciton dissociation probed by luminescence quenching Steady state fluorescence quenching Time resolved fluorescence quenching A model of field-assisted dissociation of optical excitations Exciton dissociation in doped conjugated polymers Experiments on photoluminescence quenching in doped polymers Exciton energy relaxation and quenching by Förster energy transfer Exciton quenching at charge transfer centers Photoconductivity in pristine and wealdy doped polymers Intrinsic photogeneration Dopant assisted photogeneration A model of dopant-assisted charge photogeneration Photoconductivity in polymer donor/acceptor blends Enhanced exciton dissociation at high concentration of electron acceptors A model of efficient exciton dissociation at a donor/acceptor interface Conclusions Polarons in 6-conjugated Semiconductors: Absorption Spectroscopy and Spin-dependent Recombination 235 M. Wohlgenannt 8.1 Introduction Polarons in 8-conjugated polymers and oligomers Organic electroluminescence Spin dependent exciton formation cross-sections Polaron absorption spectra Experimental Experimental results Polaron absorption spectra in doped oligomers; non-degenerate ground state systems Polaron absorption spectra in doped oligomers; degenerate ground state systems Polaron absorp hon spectra in photodoped polymer films Is polaron recombination (exciton formation) spin-dependent? Experimental 245
6 Contents IIX Experimental Results Conclusions Phosphorescence as a Probe of Exciton Formation and Energy Transfer in Organic Light Emitting Diodes 257 M. Baldo and M. Sega! 9.1 Introduction Phosphorescence, the Spin Dependence of Exciton Formation and Triplet Energy Transfer Phosphorescent Studies of Exciton Formation Energy Transfer in Blue Phosphorescent OLEDs Conclusions 267 Part III Transport and Devices Electronic Traps in Organic Transport Layers 273 R. Schmechel and H. von Seggern 10.1 Introduction Origin of trap states Trap detection techniques Traps in non-doped and doped small molecule semiconductors Pristine traps and their electronic structure Effect of doping on electronic traps Doping Induced Electrical and Optical properties Structure related traps and their influence on device performance Traps in polymeric semiconductors Conclusions Charge Carrier Density Dependence of the Hole Mobility in poly(p-phenylene vinylene) 305 C. Tanase, P. W. M. Blom, D. M. de Leeuw, E. J. Meijer 11.1 Introduction Experimental results and Discussion Charge carrier mobility in hole-only diodes Local mobility versus field-effect mobility in FETs Comparison of the hole mobility in LEDs and FETs Conclusions Analysis and Modeling of Organic Devices 319 Y Roichman, Y. Preezant, N. Rappaport, and N. Tessler 12.1 Introduction Motivation Charge transport 321
7 XI Contents The Gaussian DOS The Equilibrium Charge Density The diffusion coefficient The mobility coefficient The Operation regime of organic devices Contact workfunction Organic Light-Emitting Diodes Space charge regime Contact limited regime V Analysis of LEDs Field Effect Transistors Photo-Cells Fabrication and Analysis of Polymer Field-effect Transistors 343 S. Scheinen and G. Paasch 13.1 Introduction Models The Shocldey current characteristics Material models Drift-diffusion-model and numerical simulation Analytical estimates Basic dependencies Interrelation between material and device properties Cut-off frequency Experimental Preparation of transistors and capacitors Measuring techniques Device characterization and analyzes Basic procedure: P3OT devices as an example Layer characterization MOS capacitor Thin film transistors Devices made from MEH-PPV Further transistor designs Finger structure Short channel design Subthreshold currents and trap recharging Hysteresis Selected simulation studies Formation of inversion layers Trap distributions in top and bottom contact transistors with different source/drain work functions Short-channel effects Conclusions 385
8 A Non-degenerate approximation for the Gaussian distribution 387 DDM with traps and trap distributions 388 Contents 'XI 14 Organic Single-Crystal Field-EfFect Transistors 393 R. W. I. de Boer, M. E. Gershenson, A. F. Morpurgo, and V. Podzorov 14.1 Introduction Fabrication of single-crystal organic FETs Single-crystal growth Crystal characterization Polarized-light microscopy The time-of-flight experiments Space charge limited current spectroscopy Fabrication of the field-effect structures Electrostatic bonding technique "Direct" F ET fabrication on the crystal surface Characteristics of single-crystals OFETs Unipolar operation Field-effect threshold Sub-threshold slope Double-gated rubrene FETs Mobility Mobility anisotropy on the surface of organic crystals Preliminary results for the OFETs with high-k dielectrics Conclusion Acknowledgments Charge Carrier Photogeneration and Transport in Polymer-fullerene Bulk-heterojunction Solar Cells 433 I. Riedel, M. Pientka, and V. Dyakonov 15.1 Introduction Experimental Photoinduced charge transfer in polymer: fullerene cornposites Photovoltaic characteristics and charge carrier photogeneration efficiency of polymer-fullerene bulk heterojunction solar cells Analysis of the electrical transport properties Illumination intensity dependence Temperature dependence Bulk-heterojunction solar cells with increased absorber thickness Dependence of IPCE on reverse bias Conclusions 448
9 XIII Contents 16 Modification of PEDOT:PSS as Hole Injection Layer in Polymer LEDs 451 M. M. de Kok, M. Buechel, S. 1. E. Vulto, P. von de Weijer, E. A. Meulenkamp, 5. H. P. M. de Winter, A.J. G. Mank, H.J. M. Vorstenbosch, C. H. L. Weijtens, and V. von Eisbergen 16.1 Introduction Experimental Results Chemistry and bulk properties Surface properties Device performance Discussion Effect of NaOH on PEDOT:PSS properties Effect of NaOH addition on PLED device performance Conclusions lnsights into OLED Functioning Through Coordinated Experimental Measurements and Numerical Model Simulations 475 D. Berner, H. Houili, W. Leo, and L. Zuppiroli 17.1 Introduction Device Fabrication The Model Coulomb effects Equations of motion and injection Transport in the organic material Recombination Numerical procedure Case Studies Electrode effects Time of flight simulations Internal electric field Experimental analysis Discussion of Simulations Charge and current distribution inside the device Electric field density distribution Dye doping Experimental results: Analysis Through Simulation Mobility variation inside the doped part Recombination rate distribution Energy level shift inside the doped region General recombination picture Transport characteristics Summary 507
10 18 Optimizing OLED Structures for a-si Display Applications via Combinatorial Methods and Enhanced Outcoupling 511 W Rieß, T A. Beierlein, and H. Riel 18.1 Introduction Experimental Results and Discussion Combinatorial Device Optimization Layer-Thickness Variations: Charge-Carrier Balance Layer-Thickness Variation: Optical Effects Optical Outcoupling inch a-si AMOLED Display Conclusions 525 Contents 'XIII Index 529
Organic Molecular Solids
Markus Schwoerer, Hans Christoph Wolf Organic Molecular Solids BICENTENNIAL BICENTENNIAL WILEY-VCH Verlag GmbH & Co. KGaA VII Contents 1 Introduction 1 1.1 What are Organic Solids? 1 1.2 What are the Special
More informationElectronic and Optoelectronic Properties of Semiconductor Structures
Electronic and Optoelectronic Properties of Semiconductor Structures Jasprit Singh University of Michigan, Ann Arbor CAMBRIDGE UNIVERSITY PRESS CONTENTS PREFACE INTRODUCTION xiii xiv 1.1 SURVEY OF ADVANCES
More informationSolid Surfaces, Interfaces and Thin Films
Hans Lüth Solid Surfaces, Interfaces and Thin Films Fifth Edition With 427 Figures.2e Springer Contents 1 Surface and Interface Physics: Its Definition and Importance... 1 Panel I: Ultrahigh Vacuum (UHV)
More informationSheng S. Li. Semiconductor Physical Electronics. Second Edition. With 230 Figures. 4) Springer
Sheng S. Li Semiconductor Physical Electronics Second Edition With 230 Figures 4) Springer Contents Preface 1. Classification of Solids and Crystal Structure 1 1.1 Introduction 1 1.2 The Bravais Lattice
More informationECE 340 Lecture 39 : MOS Capacitor II
ECE 340 Lecture 39 : MOS Capacitor II Class Outline: Effects of Real Surfaces Threshold Voltage MOS Capacitance-Voltage Analysis Things you should know when you leave Key Questions What are the effects
More informationClassification of Solids
Classification of Solids Classification by conductivity, which is related to the band structure: (Filled bands are shown dark; D(E) = Density of states) Class Electron Density Density of States D(E) Examples
More informationSemiconductor Physical Electronics
Semiconductor Physical Electronics Sheng S. Li Department of Electrical Engineering University of Florida Gainesville, Florida Plenum Press New York and London Contents CHAPTER 1. Classification of Solids
More informationOPTICAL PROPERTIES AND SPECTROSCOPY OF NANOAAATERIALS. Jin Zhong Zhang. World Scientific TECHNISCHE INFORMATIONSBIBLIOTHEK
OPTICAL PROPERTIES AND SPECTROSCOPY OF NANOAAATERIALS Jin Zhong Zhang University of California, Santa Cruz, USA TECHNISCHE INFORMATIONSBIBLIOTHEK Y World Scientific NEW JERSEY. t'on.don SINGAPORE «'BEIJING
More informationCurrent mechanisms Exam January 27, 2012
Current mechanisms Exam January 27, 2012 There are four mechanisms that typically cause currents to flow: thermionic emission, diffusion, drift, and tunneling. Explain briefly which kind of current mechanisms
More informationStructure 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 informationESE 372 / Spring 2013 / Lecture 5 Metal Oxide Semiconductor Field Effect Transistor
Metal Oxide Semiconductor Field Effect Transistor V G V G 1 Metal Oxide Semiconductor Field Effect Transistor We will need to understand how this current flows through Si What is electric current? 2 Back
More informationEE 3329 Electronic Devices Syllabus ( Extended Play )
EE 3329 - Electronic Devices Syllabus EE 3329 Electronic Devices Syllabus ( Extended Play ) The University of Texas at El Paso The following concepts can be part of the syllabus for the Electronic Devices
More information7 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 informationSemiconductor 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 informationDiffusion-enhanced hole transport in thin polymer light-emitting diodes Craciun, N. I.; Brondijk, J. J.; Blom, P. W. M.
University of Groningen Diffusion-enhanced hole transport in thin polymer light-emitting diodes Craciun, N. I.; Brondijk, J. J.; Blom, P. W. M. Published in: Physical Review. B: Condensed Matter and Materials
More informationObservation 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 informationSeminars 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 informationCharacterization 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 informationК вопросу о «горячей диссоциации»
UNIVERSITY OF CAMBRIDGE Cavendish laboratory К вопросу о «горячей диссоциации» экситонов в органических полупроводниках Артем Бакулин Plastic electronics Displays Transistors Solar cells Recent hot debates
More informationLuminescence. 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 informationThe driving force dependence of charge Carrier dynamics in donor-acceptor Organic photovoltaic systems using Optical and electronic techniques
University of Wollongong Research Online University of Wollongong Thesis Collection 2017+ University of Wollongong Thesis Collections 2017 The driving force dependence of charge Carrier dynamics in donor-acceptor
More informationOrganic 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 informationSOLID STATE PHYSICS. Second Edition. John Wiley & Sons. J. R. Hook H. E. Hall. Department of Physics, University of Manchester
SOLID STATE PHYSICS Second Edition J. R. Hook H. E. Hall Department of Physics, University of Manchester John Wiley & Sons CHICHESTER NEW YORK BRISBANE TORONTO SINGAPORE Contents Flow diagram Inside front
More informationChemistry 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 informationET3034TUx 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 informationPlastic 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 informationTriplet 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 informationCHARGE CARRIERS PHOTOGENERATION. Maddalena Binda Organic Electronics: principles, devices and applications Milano, November 23-27th, 2015
CHARGE CARRIERS PHOTOGENERATION Maddalena Binda Organic Electronics: principles, devices and applications Milano, November 23-27th, 2015 Charge carriers photogeneration: what does it mean? Light stimulus
More informationHalbleiter Prof. Yong Lei Prof. Thomas Hannappel
Halbleiter Prof. Yong Lei Prof. Thomas Hannappel yong.lei@tu-ilmenau.de thomas.hannappel@tu-ilmenau.de http://www.tu-ilmenau.de/nanostruk/ Organic Semiconductors & Organic Electronics Organic semiconductors
More informationFundamentals of the Metal Oxide Semiconductor Field-Effect Transistor
Triode Working FET Fundamentals of the Metal Oxide Semiconductor Field-Effect Transistor The characteristics of energy bands as a function of applied voltage. Surface inversion. The expression for the
More informationSemiconducting Polymers
Georges Hadziioannou, Paul F. van Hütten (Eds.) Semiconducting Polymers Chemistry, Physics and Engineering WILEY-VCH Weinheim New York Chichester Brisbane Singapore Toronto Contents 1 Poly(arylene vinylene)s
More informationElectronic 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 informationKATIHAL FİZİĞİ MNT-510
KATIHAL FİZİĞİ MNT-510 YARIİLETKENLER Kaynaklar: Katıhal Fiziği, Prof. Dr. Mustafa Dikici, Seçkin Yayıncılık Katıhal Fiziği, Şakir Aydoğan, Nobel Yayıncılık, Physics for Computer Science Students: With
More informationChallenges in to-electric Energy Conversion: an Introduction
Challenges in Solar-to to-electric Energy Conversion: an Introduction Eray S. Aydil Chemical Engineering and Materials Science Department Acknowledgements: National Science Foundation Minnesota Initiative
More informationSemiconductor Physical Electronics
Semiconductor Physical Electronics Sheng S. Li Semiconductor Physical Electronics Second Edition With 230 Figures Sheng S. Li Department of Electrical and Computer Engineering University of Florida Gainesville,
More informationSolar Cell Materials and Device Characterization
Solar Cell Materials and Device Characterization April 3, 2012 The University of Toledo, Department of Physics and Astronomy SSARE, PVIC Principles and Varieties of Solar Energy (PHYS 4400) and Fundamentals
More informationOrganic Solar Cells. All Organic solar cell. Dye-sensitized solar cell. Dye. τ inj. τ c. τ r surface states D*/D + V o I 3 D/D.
The 4th U.S.-Korea NanoForum April 26-27, 2007, Honolulu, USA Improvement of Device Efficiency in Conjugated Polymer/Fullerene NanoComposite Solar Cells School of Semiconductor & Chemical Engineering *
More informationCafé com Física São Carlos, 07 th of August/2013. Gregório Couto Faria São Carlos Physics Institute University of São Paulo/Brazil
Café com Física São Carlos, 07 th of August/2013 Gregório Couto Faria São Carlos Physics Institute University of São Paulo/Brazil Organic Bioelectronics: Optic Nerve Replace Retina by P3HT/PCBM:
More informationElectronic Processes on Semiconductor Surfaces during Chemisorption
Electronic Processes on Semiconductor Surfaces during Chemisorption T. Wolkenstein Translatedfrom Russian by E. M. Yankovskii Translation edited in part by Roy Morrison CONSULTANTS BUREAU NEW YORK AND
More informationMaking OLEDs efficient
Making OLEDs efficient cathode anode light-emitting layer η = γ EL r ηpl k st External Efficiency Outcoupling Internal efficiency of LEDs η = γ EL r ηpl k st γ = excitons formed per charge flowing in the
More informationSupplementary Figure 1 Interlayer exciton PL peak position and heterostructure twisting angle. a, Photoluminescence from the interlayer exciton for
Supplementary Figure 1 Interlayer exciton PL peak position and heterostructure twisting angle. a, Photoluminescence from the interlayer exciton for six WSe 2 -MoSe 2 heterostructures under cw laser excitation
More informationReview Energy Bands Carrier Density & Mobility Carrier Transport Generation and Recombination
Review Energy Bands Carrier Density & Mobility Carrier Transport Generation and Recombination The Metal-Semiconductor Junction: Review Energy band diagram of the metal and the semiconductor before (a)
More informationOrganic Semiconductors (Molecular / Polymeric Materials)
Organic Semiconductors (Molecular / Polymeric Materials) Van-der-Waals Bonds no dangling bonds Conjugated Materials (extended (delocalized) π-electrons) Bandgap of 1.5 to 3 ev Conducting Polymers Synthetic
More informationSupplementary Figure 2 Photoluminescence in 1L- (black line) and 7L-MoS 2 (red line) of the Figure 1B with illuminated wavelength of 543 nm.
PL (normalized) Intensity (arb. u.) 1 1 8 7L-MoS 1L-MoS 6 4 37 38 39 4 41 4 Raman shift (cm -1 ) Supplementary Figure 1 Raman spectra of the Figure 1B at the 1L-MoS area (black line) and 7L-MoS area (red
More informationOrganic Electroluminescent Displays
Organic Electroluminescent Displays Richard Friend Cambridge Display Technology Cambridge, UK Recent Reviews: ( both can be downloaded from: www.cdtltd.co.uk ) R. H. Friend, et al., Nature 397, 121 (1999).
More informationUnit IV Semiconductors Engineering Physics
Introduction A semiconductor is a material that has a resistivity lies between that of a conductor and an insulator. The conductivity of a semiconductor material can be varied under an external electrical
More informationSupplementary 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(a) (b) Supplementary Figure 1. (a) (b) (a) Supplementary Figure 2. (a) (b) (c) (d) (e)
(a) (b) Supplementary Figure 1. (a) An AFM image of the device after the formation of the contact electrodes and the top gate dielectric Al 2 O 3. (b) A line scan performed along the white dashed line
More informationTime resolved optical spectroscopy methods for organic photovoltaics. Enrico Da Como. Department of Physics, University of Bath
Time resolved optical spectroscopy methods for organic photovoltaics Enrico Da Como Department of Physics, University of Bath Outline Introduction Why do we need time resolved spectroscopy in OPV? Short
More informationHow does a polymer LED OPERATE?
How does a polymer LED OPERATE? Now that we have covered many basic issues we can try and put together a few concepts as they appear in a working device. We start with an LED:. Charge injection a. Hole
More informationEECS130 Integrated Circuit Devices
EECS130 Integrated Circuit Devices Professor Ali Javey 10/02/2007 MS Junctions, Lecture 2 MOS Cap, Lecture 1 Reading: finish chapter14, start chapter16 Announcements Professor Javey will hold his OH at
More information1 Name: Student number: DEPARTMENT OF PHYSICS AND PHYSICAL OCEANOGRAPHY MEMORIAL UNIVERSITY OF NEWFOUNDLAND. Fall :00-11:00
1 Name: DEPARTMENT OF PHYSICS AND PHYSICAL OCEANOGRAPHY MEMORIAL UNIVERSITY OF NEWFOUNDLAND Final Exam Physics 3000 December 11, 2012 Fall 2012 9:00-11:00 INSTRUCTIONS: 1. Answer all seven (7) questions.
More informationTheory of Electrical Characterization of Semiconductors
Theory of Electrical Characterization of Semiconductors P. Stallinga Universidade do Algarve U.C.E.H. A.D.E.E.C. OptoElectronics SELOA Summer School May 2000, Bologna (It) Overview Devices: bulk Schottky
More informationSemiconductor Physics fall 2012 problems
Semiconductor Physics fall 2012 problems 1. An n-type sample of silicon has a uniform density N D = 10 16 atoms cm -3 of arsenic, and a p-type silicon sample has N A = 10 15 atoms cm -3 of boron. For each
More informationINTRODUCTION TO ORGANIC SEMICONDUCTOR HETEROJUNCTIONS
INTRODUCTION TO ORGANIC SEMICONDUCTOR HETEROJUNCTIONS Donghang Yan Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, China Haibo Wang Changchun Institute of Applied Chemistry, Chinese
More informationOLEDs 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 informationFabrication and Characterization of Solution Processed Top-Gate-Type Organic Light-Emitting Transistor
Copyright 2015 American Scientific Publishers All rights reserved Printed in the United States of America Nanoscience and Nanotechnology Letters Vol. 7, 1 5, 2015 Fabrication and Characterization of Solution
More informationEngineering 2000 Chapter 8 Semiconductors. ENG2000: R.I. Hornsey Semi: 1
Engineering 2000 Chapter 8 Semiconductors ENG2000: R.I. Hornsey Semi: 1 Overview We need to know the electrical properties of Si To do this, we must also draw on some of the physical properties and we
More informationIntroduction to Organic Solar Cells
Introduction to Organic Solar Cells Dr Chris Fell Solar Group Leader CSIRO Energy Technology, Newcastle, Australia Organic semiconductors Conductivity in polyacetylene 1970s Nobel Prize Alan J. Heeger
More informationUvA-DARE (Digital Academic Repository) Charge carrier dynamics in photovoltaic materials Jensen, S.A. Link to publication
UvA-DARE (Digital Academic Repository) Charge carrier dynamics in photovoltaic materials Jensen, S.A. Link to publication Citation for published version (APA): Jensen, S. A. (2014). Charge carrier dynamics
More informationPhotonic Devices Human eye: about 400 nm to 700 nm
Photonic Devices Human eye: about 400 nm to 700 nm λ [ nm] = 1240 E[ ev ] S. M. Sze, Physics of Semiconductor Devices Sensitivity of the human eye Two LEDs: red (λ = 660 nm) green (λ = 560 nm) emitting
More informationGraphene Canada Montreal Oct. 16, 2015 (International Year of Light)
Luminescence Properties of Graphene A. Beltaos 1,2,3, A. Bergren 1, K. Bosnick 1, N. Pekas 1, A. Matković 4, A. Meldrum 2 1 National Institute for Nanotechnology (NINT), 11421 Saskatchewan Drive, Edmonton,
More informationFabrication / Synthesis Techniques
Quantum Dots Physical properties Fabrication / Synthesis Techniques Applications Handbook of Nanoscience, Engineering, and Technology Ch.13.3 L. Kouwenhoven and C. Marcus, Physics World, June 1998, p.35
More informationSemiconductor device structures are traditionally divided into homojunction devices
0. Introduction: Semiconductor device structures are traditionally divided into homojunction devices (devices consisting of only one type of semiconductor material) and heterojunction devices (consisting
More informationChapter 1 Overview of Semiconductor Materials and Physics
Chapter 1 Overview of Semiconductor Materials and Physics Professor Paul K. Chu Conductivity / Resistivity of Insulators, Semiconductors, and Conductors Semiconductor Elements Period II III IV V VI 2 B
More informationSelf-study problems and questions Processing and Device Technology, FFF110/FYSD13
Self-study problems and questions Processing and Device Technology, FFF110/FYSD13 Version 2016_01 In addition to the problems discussed at the seminars and at the lectures, you can use this set of problems
More informationLecture 15: Optoelectronic devices: Introduction
Lecture 15: Optoelectronic devices: Introduction Contents 1 Optical absorption 1 1.1 Absorption coefficient....................... 2 2 Optical recombination 5 3 Recombination and carrier lifetime 6 3.1
More informationLuminescence Process
Luminescence Process The absorption and the emission are related to each other and they are described by two terms which are complex conjugate of each other in the interaction Hamiltonian (H er ). In an
More information2D 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 informationUNIT I: Electronic Materials.
SIDDHARTH INSTITUTE OF ENGINEERING & TECHNOLOGY :: PUTTUR Siddharth Nagar, Narayanavanam Road 517583 QUESTION BANK (DESCRIPTIVE) Subject with Code: SEMICONDUCTOR PHYSICS (18HS0851) Course & Branch: B.Tech
More informationCharge carriers photogeneration. Maddalena Binda Organic Electronics: principles, devices and applications Milano, November 26-29th, 2013
Charge carriers photogeneration Maddalena Binda Organic Electronics: principles, devices and applications Milano, November 26-29th, 2013 Charge carriers photogeneration: what does it mean? Light stimulus
More informationA Gated Four Probe Technique for Field Effect Measurements on Disordered Organic Semiconductors
A Gated Four Probe Technique for Field Effect Measurements on Disordered Organic Semiconductors Elizabeth von Hauff, Nicolas Spethmann, and Jürgen Parisi Institute of Physics, Department for Energy and
More informationExciton transport in organic nanostructures
Exciton transport in organic nanostructures Tarik Abdelmoula, Department of Physics, Imperial College London A thesis presented for the degree of Doctor of Philosophy of Imperial College London September
More informationSébastien FORGET. Laboratoire de Physique des Lasers Université Paris Nord P13. www-lpl.univ-paris13.fr:8088/lumen/
OLEDs Basic principles, technology and applications Sébastien FORGET Laboratoire de Physique des Lasers Université Paris Nord P13 www-lpl.univ-paris13.fr:8088/lumen/ Paris Nord University (Paris 13) This
More informationChapter 7. The pn Junction
Chapter 7 The pn Junction Chapter 7 PN Junction PN junction can be fabricated by implanting or diffusing donors into a P-type substrate such that a layer of semiconductor is converted into N type. Converting
More informationFlexible Organic Photovoltaics Employ laser produced metal nanoparticles into the absorption layer 1. An Introduction
Flexible Organic Photovoltaics Employ laser produced metal nanoparticles into the absorption layer 1. An Introduction Among the renewable energy sources that are called to satisfy the continuously increased
More informationBasic Photoexcitation and Modulation Spectroscopy
Basic Photoexcitation and Modulation Spectroscopy Intro Review lock-in detection Photoinduced absorption Electroabsorption (Stark) Spectroscopy Charge Modulation Photoexcite sample Take absorption spectra
More informationSurface Transfer Doping of Diamond by Organic Molecules
Surface Transfer Doping of Diamond by Organic Molecules Qi Dongchen Department of Physics National University of Singapore Supervisor: Prof. Andrew T. S. Wee Dr. Gao Xingyu Scope of presentation Overview
More informationOpto-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 informationHarald Ibach Hans Lüth SOLID-STATE PHYSICS. An Introduction to Theory and Experiment
Harald Ibach Hans Lüth SOLID-STATE PHYSICS An Introduction to Theory and Experiment With 230 Figures Springer-Verlag Berlin Heidelberg New York London Paris Tokyo Hong Kong Barcelona Budapest Contents
More informationLaser Diodes. Revised: 3/14/14 14: , Henry Zmuda Set 6a Laser Diodes 1
Laser Diodes Revised: 3/14/14 14:03 2014, Henry Zmuda Set 6a Laser Diodes 1 Semiconductor Lasers The simplest laser of all. 2014, Henry Zmuda Set 6a Laser Diodes 2 Semiconductor Lasers 1. Homojunction
More informationOptical Characterization of Solids
D. Dragoman M. Dragoman Optical Characterization of Solids With 184 Figures Springer 1. Elementary Excitations in Solids 1 1.1 Energy Band Structure in Crystalline Materials 2 1.2 k p Method 11 1.3 Numerical
More informationMagnetic and optic sensing. Magnetic sensors
Magnetic and optic sensing Magnetic sensors 1 Literature Physics of Semiconductor Devices S.M. Sze, Kwok K. Ng Available as ebook on http://www.lub.lu.se/en/search/lubsearch.ht ml This lecture chapters
More informationContents. Preface to the first edition
Contents List of authors Preface to the first edition Introduction x xi xiii 1 The nanotechnology revolution 1 1.1 From micro- to nanoelectronics 2 1.2 From the macroscopic to the nanoscopic world 4 1.3
More informationModern Optical Spectroscopy
Modern Optical Spectroscopy With Exercises and Examples from Biophysics and Biochemistry von William W Parson 1. Auflage Springer-Verlag Berlin Heidelberg 2006 Verlag C.H. Beck im Internet: www.beck.de
More informationIntroduction. 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 informationan introduction to Semiconductor Devices
an introduction to Semiconductor Devices Donald A. Neamen Chapter 6 Fundamentals of the Metal-Oxide-Semiconductor Field-Effect Transistor Introduction: Chapter 6 1. MOSFET Structure 2. MOS Capacitor -
More informationESE 570: Digital Integrated Circuits and VLSI Fundamentals
ESE 570: Digital Integrated Circuits and VLSI Fundamentals Lec 4: January 23, 2018 MOS Transistor Theory, MOS Model Penn ESE 570 Spring 2018 Khanna Lecture Outline! CMOS Process Enhancements! Semiconductor
More informationESE 570: Digital Integrated Circuits and VLSI Fundamentals
ESE 570: Digital Integrated Circuits and VLSI Fundamentals Lec 4: January 29, 2019 MOS Transistor Theory, MOS Model Penn ESE 570 Spring 2019 Khanna Lecture Outline! CMOS Process Enhancements! Semiconductor
More informationCharge 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 informationSemiconductor Junctions
8 Semiconductor Junctions Almost all solar cells contain junctions between different materials of different doping. Since these junctions are crucial to the operation of the solar cell, we will discuss
More informationPhotovoltage 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 informationResonant 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 informationPHYSICS nd TERM Outline Notes (continued)
PHYSICS 2800 2 nd TERM Outline Notes (continued) Section 6. Optical Properties (see also textbook, chapter 15) This section will be concerned with how electromagnetic radiation (visible light, in particular)
More informationMonolayer 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 informationLecture 20: Semiconductor Structures Kittel Ch 17, p , extra material in the class notes
Lecture 20: Semiconductor Structures Kittel Ch 17, p 494-503, 507-511 + extra material in the class notes MOS Structure Layer Structure metal Oxide insulator Semiconductor Semiconductor Large-gap Semiconductor
More informationSession 5: Solid State Physics. Charge Mobility Drift Diffusion Recombination-Generation
Session 5: Solid State Physics Charge Mobility Drift Diffusion Recombination-Generation 1 Outline A B C D E F G H I J 2 Mobile Charge Carriers in Semiconductors Three primary types of carrier action occur
More informationORGANIC 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 informationSection 12: Intro to Devices
Section 12: Intro to Devices Extensive reading materials on reserve, including Robert F. Pierret, Semiconductor Device Fundamentals Bond Model of Electrons and Holes Si Si Si Si Si Si Si Si Si Silicon
More informationSection 12: Intro to Devices
Section 12: Intro to Devices Extensive reading materials on reserve, including Robert F. Pierret, Semiconductor Device Fundamentals EE143 Ali Javey Bond Model of Electrons and Holes Si Si Si Si Si Si Si
More information