# Photodetector Basics

Save this PDF as:

Size: px
Start display at page:

## Transcription

1 Photodetection: Absorption => Current Generation hυ Currents Materials for photodetection: t ti E g <h hν Various methods for generating currents with photo-generated carriers: photoconductors, photodiodes, avalanche photodiodes

2 Photon energy (ev) Ge In 0.7 Ga 0.3 As 0.64 P Sharp decrease in α In 0.53 Ga 0.47 As Si for λ>e g GaAs α (m -1 ) InP a-si:h - Photodetection t ti for indirect bandgap materials? Wavelength (μm)

3 - Photodetection for indirect bandgap materials? E E CB E c CB Indirect Bandgap, E g Direct Bandgap E g Photon E v Photon E c VB VB E v Phonon k k k k (a) GaAs (Direct bandgap) (b) Si (Indirect bandgap)

4 Photodetection efficiency R (Responsivity) = I P I q η (Quantum Efficiency) = P h ν q λμ [ m] R = η = η 0.3 hν Responsivity y( (A/W) Ideal Photodiode QE = 100% ( η = 1) Si Photodiode λ g Wavelength (nm)

5 Photoconductor Without light, w d Conductivity: σ = q μ n + q μ p ( μ : electron, hole mobility) eh, V J = σ E and I = wd σ e h n 0, p 0 With light, I + v - n= n +Δ n, p = p +Δp 0 0 σ +Δ σ = q μ ( n +Δ n ) + q μ ( p +Δ p ) e V V Δ I = wd Δσ = wd ( qμeδ n+ qμhδp) h 0

6 With light, n, p w d V Δ I = wdδ σ = wd qμeδ n+ qμhδp ( ) V + v - I P τ Since Δ n=δ p = ηint and assuming Δn, Δp are uniform, hν wd V P τ V P τ Δ I = wdδ σ = wd q( μe + μh) ηint = q( μe + μh) ηint V 2 hν wd hν ΔI q τ R = (assuming dark current is small) = ( μ e + μ h ) η int 2 P hν τ η = ( μe + μh) ηint = G η 2 int

7 h+ e Photoconductor I ph τ Gain: G = ( μe + μh) V 2 τ τ τ Assuming μe >> μh, G = μe V = = 2 2 τ e μ V τ e = = = ; time for travelling distance V μ e e μ E v τ >> τ e ==> electrons circulate many time before recombination e

8 d Photoconductors: I n, p + v - w - Very easy to make - arge gain - But slow (speed limited by τ) and significant dark currents

9 photodiode Faster, dark-current-free photodetectors? p n B - h + As + e PN junction in reverse bias -No significant current flow=> small dark currents E (x) W p M 0 W n x - Photo-generated carriers are removed by built-in field in depletion region (space charge region) E o

10 P N Photo-generated t carriers drift into P (holes) and N (electrons) regions creating currents. I = η int P q hν E (x) W p 0 W n x M p One photon creates electron and hole Problem: depletion region is very thin (< 1 μm) ) E o η int is very small. => >Use PIN structure t

11 SiO 2 Electrode p + Electrode (a) i-si n + ρ net en d (b) x PIN Photodiode en a E(x) (c) x E o W hυ > E g (d ) E h + e I ph R V out V r

12 CMOS Image Sensor

13 MSM (Metal-Semiconductor Metal) PD Carrier collection by lateral E-field provided by Schottky contacts Not very efficient but can be very fast

14 Avalanche Photodiode (APD): PIN PD + Gain (avalanche: a large mass of snow, ice, earth, rock, or other material in swift motion down a mountainside) id Achieve gain by multiplying electrons and/or holes. Impact Ionization: Under high E-field, electrons and holes can have sufficiently high kinetic energies breaking bonds and creating new e-h pairs. E E e h + E c e E v n + p Avalanche region š h +

15 In real APD, care is taken so that only one type of carrier (either electron or hole) causes impact ionization. APD has limited application for optical communication since high-performance EDFA is easily available APD is very useful for optical interconnect applications.

### Photosynthesis & Solar Power Harvesting

Lecture 23 Semiconductor Detectors - Photodetectors Principle of the pn junction photodiode Absorption coefficient and photodiode materials Properties of semiconductor detectors The pin photodiodes Avalanche

### OPTI510R: Photonics. Khanh Kieu College of Optical Sciences, University of Arizona Meinel building R.626

OPTI510R: Photonics Khanh Kieu College of Optical Sciences, University of Arizona kkieu@optics.arizona.edu Meinel building R.626 Announcements Homework #6 is assigned, due May 1 st Final exam May 8, 10:30-12:30pm

### Single Photon detectors

Single Photon detectors Outline Motivation for single photon detection Semiconductor; general knowledge and important background Photon detectors: internal and external photoeffect Properties of semiconductor

### Lecture 8. Equations of State, Equilibrium and Einstein Relationships and Generation/Recombination

Lecture 8 Equations of State, Equilibrium and Einstein Relationships and Generation/Recombination Reading: (Cont d) Notes and Anderson 2 sections 3.4-3.11 Energy Equilibrium Concept Consider a non-uniformly

### Photodiodes and other semiconductor devices

Photodiodes and other semiconductor devices Chem 243 Winter 2017 What is a semiconductor? no e - Empty e levels Conduction Band a few e - Empty e levels Filled e levels Filled e levels lots of e - Empty

### 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

### Spring Semester 2012 Final Exam

Spring Semester 2012 Final Exam Note: Show your work, underline results, and always show units. Official exam time: 2.0 hours; an extension of at least 1.0 hour will be granted to anyone. Materials parameters

### 3.1 Absorption and Transparency

3.1 Absorption and Transparency 3.1.1 Optical Devices (definitions) 3.1.2 Photon and Semiconductor Interactions 3.1.3 Photon Intensity 3.1.4 Absorption 3.1 Absorption and Transparency Objective 1: Recall

### Laser Basics. What happens when light (or photon) interact with a matter? Assume photon energy is compatible with energy transition levels.

What happens when light (or photon) interact with a matter? Assume photon energy is compatible with energy transition levels. Electron energy levels in an hydrogen atom n=5 n=4 - + n=3 n=2 13.6 = [ev]

### (b) Spontaneous emission. Absorption, spontaneous (random photon) emission and stimulated emission.

Lecture 10 Stimulated Emission Devices Lasers Stimulated emission and light amplification Einstein coefficients Optical fiber amplifiers Gas laser and He-Ne Laser The output spectrum of a gas laser Laser

### EECS130 Integrated Circuit Devices

EECS130 Integrated Circuit Devices Professor Ali Javey 8/30/2007 Semiconductor Fundamentals Lecture 2 Read: Chapters 1 and 2 Last Lecture: Energy Band Diagram Conduction band E c E g Band gap E v Valence

### Semiconductor 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

### COURSE OUTLINE. Introduction Signals and Noise Filtering Sensors: PD5 Avalanche PhotoDiodes. Sensors, Signals and Noise 1

Sensors, Signals and Noise 1 COURSE OUTLINE Introduction Signals and Noise Filtering Sensors: PD5 Avalanche PhotoDiodes Avalanche Photo-Diodes (APD) 2 Impact ionization in semiconductors Linear amplification

### Stimulated Emission Devices: LASERS

Stimulated Emission Devices: LASERS 1. Stimulated Emission and Photon Amplification E 2 E 2 E 2 hυ hυ hυ In hυ Out hυ E 1 E 1 E 1 (a) Absorption (b) Spontaneous emission (c) Stimulated emission The Principle

### Solar cells operation

Solar cells operation photovoltaic effect light and dark V characteristics effect of intensity effect of temperature efficiency efficency losses reflection recombination carrier collection and quantum

### ENERGY BANDS AND GAPS IN SEMICONDUCTOR. Muhammad Hafeez Javed

ENERGY BANDS AND GAPS IN SEMICONDUCTOR Muhammad Hafeez Javed www.rmhjaved.com rmhjaved@gmail.com Out Line Introduction Energy band Classification of materials Direct and indirect band gap of SC Classification

### B12: Semiconductor Devices

B12: Semiconductor Devices Example Sheet 2: Solutions Question 1 To get from eq. (5.70) of the notes to the expression given in the examples sheet, we simply invoke the relations n 0 p 0, n 0 n 0. In this

### Lecture Notes 2 Charge-Coupled Devices (CCDs) Part I. Basic CCD Operation CCD Image Sensor Architectures Static and Dynamic Analysis

Lecture Notes 2 Charge-Coupled Devices (CCDs) Part I Basic CCD Operation CCD Image Sensor Architectures Static and Dynamic Analysis Charge Well Capacity Buried channel CCD Transfer Efficiency Readout Speed

### External (differential) quantum efficiency Number of additional photons emitted / number of additional electrons injected

Semiconductor Lasers Comparison with LEDs The light emitted by a laser is generally more directional, more intense and has a narrower frequency distribution than light from an LED. The external efficiency

### Chapter 7. Solar Cell

Chapter 7 Solar Cell 7.0 Introduction Solar cells are useful for both space and terrestrial application. Solar cells furnish the long duration power supply for satellites. It converts sunlight directly

### UNIT - IV SEMICONDUCTORS AND MAGNETIC MATERIALS

1. What is intrinsic If a semiconductor is sufficiently pure, then it is known as intrinsic semiconductor. ex:: pure Ge, pure Si 2. Mention the expression for intrinsic carrier concentration of intrinsic

### Photodetectors and their Spectral Ranges

Photodetectors and their Spectral Ranges SINGLE ELEMENT IMAGE - photoemission devices vacuum photodiode pickup tubes (or external gas photodiode image intensifiers photoelectric devices) photomultiplier

### Uniform excitation: applied field and optical generation. Non-uniform doping/excitation: diffusion, continuity

6.012 - Electronic Devices and Circuits Lecture 2 - Uniform Excitation; Non-uniform conditions Announcements Review Carrier concentrations in TE given the doping level What happens above and below room

### Photovoltaic cell and module physics and technology. Vitezslav Benda, Prof Czech Technical University in Prague

Photovoltaic cell and module physics and technology Vitezslav Benda, Prof Czech Technical University in Prague benda@fel.cvut.cz www.fel.cvut.cz 1 Outlines Photovoltaic Effect Photovoltaic cell structure

### Lecture 4 - Carrier generation and recombination. February 12, 2007

6.720J/3.43J - Integrated Microelectronic Devices - Spring 2007 Lecture 4-1 Contents: Lecture 4 - Carrier generation and recombination 1. G&R mechanisms February 12, 2007 2. Thermal equilibrium: principle

### Comparison of Ge, InGaAs p-n junction solar cell

ournal of Physics: Conference Series PAPER OPEN ACCESS Comparison of Ge, InGaAs p-n junction solar cell To cite this article: M. Korun and T. S. Navruz 16. Phys.: Conf. Ser. 77 135 View the article online

### The Electromagnetic Properties of Materials

The Electromagnetic Properties of Materials Electrical conduction Metals Semiconductors Insulators (dielectrics) Superconductors Magnetic materials Ferromagnetic materials Others Photonic Materials (optical)

### Chapter 5. Semiconductor Laser

Chapter 5 Semiconductor Laser 5.0 Introduction Laser is an acronym for light amplification by stimulated emission of radiation. Albert Einstein in 1917 showed that the process of stimulated emission must

### OPTOELECTRONIC DEVICES

OPTOELECTRONIC DEVICES 12.1 THE P-N JUNCTION DIODE This Chapter is devoted to the wide variety of optoelectronic devices that are made in semiconductor materials. Many (although not all) involve the absorption

### ECE 250 Electronic Devices 1. Electronic Device Modeling

ECE 250 Electronic Devices 1 ECE 250 Electronic Device Modeling ECE 250 Electronic Devices 2 Introduction to Semiconductor Physics You should really take a semiconductor device physics course. We can only

### Semiconductor Physics Problems 2015

Semiconductor Physics Problems 2015 Page and figure numbers refer to Semiconductor Devices Physics and Technology, 3rd edition, by SM Sze and M-K Lee 1. The purest semiconductor crystals it is possible

### EE495/695 Introduction to Semiconductors I. Y. Baghzouz ECE Department UNLV

EE495/695 Introduction to Semiconductors I Y. Baghzouz ECE Department UNLV Introduction Solar cells have always been aligned closely with other electronic devices. We will cover the basic aspects of semiconductor

### Semiconductor X-Ray Detectors. Tobias Eggert Ketek GmbH

Semiconductor X-Ray Detectors Tobias Eggert Ketek GmbH Semiconductor X-Ray Detectors Part A Principles of Semiconductor Detectors 1. Basic Principles 2. Typical Applications 3. Planar Technology 4. Read-out

### Title: Ultrafast photocurrent measurement of the escape time of electrons and holes from

Title: Ultrafast photocurrent measurement of the escape time of electrons and holes from carbon nanotube PN junction photodiodes Authors: Nathaniel. M. Gabor 1,*, Zhaohui Zhong 2, Ken Bosnick 3, Paul L.

### What do we study and do?

What do we study and do? Light comes from electrons transitioning from higher energy to lower energy levels. Wave-particle nature of light Wave nature: refraction, diffraction, interference (labs) Particle

### p-n junction biasing, p-n I-V characteristics, p-n currents Norlaili Mohd. Noh EEE /09

CLASS 6&7 p-n junction biasing, p-n I-V characteristics, p-n currents 1 p-n junction biasing Unbiased p-n junction: the potential barrier is 0.7 V for Si and 0.3 V for Ge. Nett current across the p-n junction

### Optical properties of semiconductors. Dr. Katarzyna Skorupska

Otical roerties of semiconductors Dr. Katarzyna Skoruska band structure of crystalline solids by solution of Schroedinger equation (one e - aroximation) Solution leads to energy bands searated by an energy

### EE 446/646 Photovoltaic Devices I. Y. Baghzouz

EE 446/646 Photovoltaic Devices I Y. Baghzouz What is Photovoltaics? First used in about 1890, the word has two parts: photo, derived from the Greek word for light, volt, relating to electricity pioneer

### An Overview of the analysis of two dimensional back illuminated GaAs MESFET

An Overview of the analysis of two dimensional back illuminated GaAs MESFET Prof. Lochan Jolly*, Ms. Sonia Thalavoor** *(A.P- Department of Electronics & Telecommunication, TCET, Mumbai Email: lochan.jolly@thakureducation.org)

### Modeling PIN Photodiodes. Roger W. Pryor, Ph.D.,VP Research Pryor Knowledge Systems, Inc.

Presented at the COMSOL Conference 2010 Boston Modeling PIN Photodiodes,VP Research, Inc. PIN Photodiode Modeling This paper presents a new AC/DC Conduction Current Module Model of a PIN Photodiode using

### Effective masses in semiconductors

Effective masses in semiconductors The effective mass is defined as: In a solid, the electron (hole) effective mass represents how electrons move in an applied field. The effective mass reflects the inverse

### pn JUNCTION THE SHOCKLEY MODEL

The pn Junction: The Shockley Model ( S. O. Kasap, 1990-001) 1 pn JUNCTION THE SHOCKLEY MODEL Safa Kasap Department of Electrical Engineering University of Saskatchewan Canada Although the hole and its

### Silicon Detectors in High Energy Physics

Thomas Bergauer (HEPHY Vienna) IPM Teheran 22 May 2011 Sunday: Schedule Silicon Detectors in Semiconductor Basics (45 ) Detector concepts: Pixels and Strips (45 ) Coffee Break Strip Detector Performance

### Semiconductor Detectors are Ionization Chambers. Detection volume with electric field Energy deposited positive and negative charge pairs

1 V. Semiconductor Detectors V.1. Principles Semiconductor Detectors are Ionization Chambers Detection volume with electric field Energy deposited positive and negative charge pairs Charges move in field

### OPTI510R: Photonics. Khanh Kieu College of Optical Sciences, University of Arizona Meinel building R.626

OPTI510R: Photonics Khanh Kieu College of Optical Sciences, University of Arizona kkieu@optics.arizona.edu Meinel building R.626 Announcements HW #6 is assigned, due April 23 rd Final exam May 2 Semiconductor

### Advantages / Disadvantages of semiconductor detectors

Advantages / Disadvantages of semiconductor detectors Semiconductor detectors have a high density (compared to gas detector) large energy loss in a short distance diffusion effect is smaller than in gas

### Photovoltaic cell and module physics and technology

Photovoltaic cell and module physics and technology Vitezslav Benda, Prof Czech Technical University in Prague benda@fel.cvut.cz www.fel.cvut.cz 6/21/2012 1 Outlines Photovoltaic Effect Photovoltaic cell

### Semiconductors and Optoelectronics. Today Semiconductors Acoustics. Tomorrow Come to CH325 Exercises Tours

Semiconductors and Optoelectronics Advanced Physics Lab, PHYS 3600 Don Heiman, Northeastern University, 2017 Today Semiconductors Acoustics Tomorrow Come to CH325 Exercises Tours Semiconductors and Optoelectronics

### Crystal Properties. MS415 Lec. 2. High performance, high current. ZnO. GaN

Crystal Properties Crystal Lattices: Periodic arrangement of atoms Repeated unit cells (solid-state) Stuffing atoms into unit cells Determine mechanical & electrical properties High performance, high current

### In a metal, how does the probability distribution of an electron look like at absolute zero?

1 Lecture 6 Laser 2 In a metal, how does the probability distribution of an electron look like at absolute zero? 3 (Atom) Energy Levels For atoms, I draw a lower horizontal to indicate its lowest energy

### Conductivity and Semi-Conductors

Conductivity and Semi-Conductors J = current density = I/A E = Electric field intensity = V/l where l is the distance between two points Metals: Semiconductors: Many Polymers and Glasses 1 Electrical Conduction

### PHYS208 P-N Junction. Olav Torheim. May 30, 2007

1 PHYS208 P-N Junction Olav Torheim May 30, 2007 1 Intrinsic semiconductors The lower end of the conduction band is a parabola, just like in the quadratic free electron case (E = h2 k 2 2m ). The density

### Chapter 3 Properties of Nanostructures

Chapter 3 Properties of Nanostructures In Chapter 2, the reduction of the extent of a solid in one or more dimensions was shown to lead to a dramatic alteration of the overall behavior of the solids. Generally,

### Luminescence basics. Slide # 1

Luminescence basics Types of luminescence Cathodoluminescence: Luminescence due to recombination of EHPs created by energetic electrons. Example: CL mapping system Photoluminescence: Luminescence due to

### ρ ρ LED access resistances d A W d s n s p p p W the output window size p-layer d p series access resistance d n n-layer series access resistance

LED access resistances W the output window size p-layer series access resistance d p n-layer series access resistance d n The n-layer series access resistance R = ρ s n where the resistivity of the n-layer

### Theoretical Study on Graphene Silicon Heterojunction Solar Cell

Copyright 2015 American Scientific Publishers All rights reserved Printed in the United States of America Journal of Nanoelectronics and Optoelectronics Vol. 10, 1 5, 2015 Theoretical Study on Graphene

### Fundamentals of Nanoelectronics: Basic Concepts

Fundamentals of Nanoelectronics: Basic Concepts Sławomir Prucnal FWIM Page 1 Introduction Outline Electronics in nanoscale Transport Ohms law Optoelectronic properties of semiconductors Optics in nanoscale

### SILICON AVALANCHE PHOTODIODES ARRAY FOR PARTICLE DETECTOR: MODELLING AND FABRICATION

SILICON AVALANCHE PHOTODIODES ARRAY FOR PARTICLE DETECTOR: ODELLING AND FABRICATION Alexandre Khodin, Dmitry Shvarkov, Valery Zalesski Institute of Electronics, National Academy of Sciences of Belarus

### MSE 310/ECE 340: Electrical Properties of Materials Fall 2014 Department of Materials Science and Engineering Boise State University

MSE 310/ECE 340: Electrical Properties of Materials Fall 2014 Department of Materials Science and Engineering Boise State University Practice Final Exam 1 Read the questions carefully Label all figures

### FYS3410 Condensed matter physics

FYS3410 Condensed matter physics Lecture 23 and 24: pn-junctions and electrooptics Randi Haakenaasen UniK/UiO Forsvarets forskningsinstitutt 11.05.2016 and 18.05.2016 Outline Why pn-junctions are important

### Lecture 6 PN Junction and MOS Electrostatics(III) Metal-Oxide-Semiconductor Structure

Lecture 6 PN Junction and MOS Electrostatics(III) Metal-Oxide-Semiconductor Structure Outline 1. Introduction to MOS structure 2. Electrostatics of MOS in thermal equilibrium 3. Electrostatics of MOS with

### A. OTHER JUNCTIONS B. SEMICONDUCTOR HETEROJUNCTIONS -- MOLECULES AT INTERFACES: ORGANIC PHOTOVOLTAIC BULK HETEROJUNCTION DYE-SENSITIZED SOLAR CELL

A. OTHER JUNCTIONS B. SEMICONDUCTOR HETEROJUNCTIONS -- MOLECULES AT INTERFACES: ORGANIC PHOTOVOLTAIC BULK HETEROJUNCTION DYE-SENSITIZED SOLAR CELL February 9 and 14, 2012 The University of Toledo, Department

### Chapter-4 Stimulated emission devices LASERS

Semiconductor Laser Diodes Chapter-4 Stimulated emission devices LASERS The Road Ahead Lasers Basic Principles Applications Gas Lasers Semiconductor Lasers Semiconductor Lasers in Optical Networks Improvement

### Semiconductor Detectors

Semiconductor Detectors Summary of Last Lecture Band structure in Solids: Conduction band Conduction band thermal conductivity: E g > 5 ev Valence band Insulator Charge carrier in conductor: e - Charge

### In recent years there has been a considerable interest and a widespread research effort in the development ofavalanche photodiodes (APDs) with thin mu

Breakdown Voltage in Thin III V Avalanche Photodiodes Mohammad A. Saleh Electro-Optics Program, University of Dayton, Dayton, OH 45469 0245 USA Majeed M. Hayat a), Oh-Hyun Kwon Department of Electrical

### Lecture 4. Detectors for Ionizing Particles

Lecture 4 Detectors for Ionizing Particles Introduction Overview of detector systems Sources of radiation Radioactive decay Cosmic Radiation Accelerators Content Interaction of Radiation with Matter General

### Unit 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

### Chapter 6: Basic radiation detectors

Chapter 6: Basic radiation detectors Set of 60 slides based on the chapter authored by C.W.E. VAN EIJK Faculty of Applied Sciences, Delft University of Technology, Delft, Netherlands of the publication

### High Power Diode Lasers

Lecture 10/1 High Power Diode Lasers Low Power Lasers (below tenth of mw) - Laser as a telecom transmitter; - Laser as a spectroscopic sensor; - Laser as a medical diagnostic tool; - Laser as a write-read

### Study of radiation damage induced by 82 MeV protons on multipixel Geiger-mode avalanche photodiodes

Study of radiation damage induced by 82 MeV protons on multipixel Geiger-mode avalanche photodiodes Y. Musienko*, S. Reucroft, J. Swain (Northeastern University, Boston) D. Renker, K. Dieters (PSI, Villigen)

### Review 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)

### Semiconductor Devices and Circuits Fall Midterm Exam. Instructor: Dr. Dietmar Knipp, Professor of Electrical Engineering. Name: Mat. -Nr.

Semiconductor Devices and Circuits Fall 2003 Midterm Exam Instructor: Dr. Dietmar Knipp, Professor of Electrical Engineering Name: Mat. -Nr.: Guidelines: Duration of the Midterm: 1 hour The exam is a closed

### electronics fundamentals

electronics fundamentals circuits, devices, and applications THOMAS L. FLOYD DAVID M. BUCHLA Lesson 1: Diodes and Applications Semiconductors Figure 1-1 The Bohr model of an atom showing electrons in orbits

### 3.003 Principles of Engineering Practice

3.003 Principles of Engineering Practice One Month Review Solar Cells The Sun Semiconductors pn junctions Electricity 1 Engineering Practice 1. Problem Definition 2. Constraints 3. Options 4. Analysis

### Basic Physics of Semiconductors

Basic Physics of Semiconductors Semiconductor materials and their properties PN-junction diodes Reverse Breakdown EEM 205 Electronics I Dicle University, EEE Dr. Mehmet Siraç ÖZERDEM Semiconductor Physics

### CHAPTER 4: P-N P N JUNCTION Part 2. M.N.A. Halif & S.N. Sabki

CHAPTER 4: P-N P N JUNCTION Part 2 Part 2 Charge Storage & Transient Behavior Junction Breakdown Heterojunction CHARGE STORAGE & TRANSIENT BEHAVIOR Once injected across the junction, the minority carriers

### Spectral Properties of Semiconductor Photodiodes

1 Spectral Properties of Semiconductor Photodiodes Terubumi Saito National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology 1-1-1, Umezono, Tsukuba-shi, Ibaraki

### Surfaces, Interfaces, and Layered Devices

Surfaces, Interfaces, and Layered Devices Building blocks for nanodevices! W. Pauli: God made solids, but surfaces were the work of Devil. Surfaces and Interfaces 1 Interface between a crystal and vacuum

### UNIVERSITY OF CALIFORNIA College of Engineering Department of Electrical Engineering and Computer Sciences. Professor Chenming Hu.

UNIVERSITY OF CALIFORNIA College of Engineering Department of Electrical Engineering and Computer Sciences EECS 130 Spring 2009 Professor Chenming Hu Midterm I Name: Closed book. One sheet of notes is

### ORTEC. Review of the Physics of Semiconductor Detectors. Interaction of Ionizing Radiation with Semiconductor Detectors. Heavy Charged Particles

ORTEC Review of the Physics of Historically, semiconductor detectors were conceived as solid-state ionization chambers. To obtain a high-electric-field, low-current, solid-state device for detection and

### Electronic Circuits for Mechatronics ELCT 609 Lecture 2: PN Junctions (1)

Electronic Circuits for Mechatronics ELCT 609 Lecture 2: PN Junctions (1) Assistant Professor Office: C3.315 E-mail: eman.azab@guc.edu.eg 1 Electronic (Semiconductor) Devices P-N Junctions (Diodes): Physical

### The Electromagnetic Properties of Materials

The lectromagnetic Properties of Materials lectrical conduction Metals Semiconductors Insulators (dielectrics) Superconductors Magnetic materials Ferromagnetic materials Others Photonic Materials (optical)

### 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,

Photo Diode Interaction of Light & Atomic Systems Assume Only two possible states of energy: W u and W l Energy levels are infinitesimally sharp Optical transitions occur between u and l Monochromatic

### The Role of doping in the window layer on Performance of a InP Solar Cells USING AMPS-1D

IOSR Journal of Engineering (IOSRJEN) ISSN: 2250-3021 Volume 2, Issue 8(August 2012), PP 42-46 The Role of doping in the window layer on Performance of a InP Solar Cells USING AMPS-1D Dennai Benmoussa

### New solid state photomultiplier. Dmitry Shushakov and Vitaly Shubin

New solid state photomultiplier Dmitry Shushakov and Vitaly Shubin P. N. Lebedev Physical Institute, Department of Solid State Physics, Moscow, Russia. ABSTRACT The physical principles of a new high-sensitive

### Chapter 4: Bonding in Solids and Electronic Properties. Free electron theory

Chapter 4: Bonding in Solids and Electronic Properties Free electron theory Consider free electrons in a metal an electron gas. regards a metal as a box in which electrons are free to move. assumes nuclei

### Lecture 2. Unit Cells and Miller Indexes. Reading: (Cont d) Anderson 2 1.8,

Lecture 2 Unit Cells and Miller Indexes Reading: (Cont d) Anderson 2 1.8, 2.1-2.7 Unit Cell Concept The crystal lattice consists of a periodic array of atoms. Unit Cell Concept A building block that can

### 2. The electrochemical potential and Schottky barrier height should be quantified in the schematic of Figure 1.

Reviewers' comments: Reviewer #1 (Remarks to the Author): The paper reports a photon enhanced thermionic effect (termed the photo thermionic effect) in graphene WSe2 graphene heterostructures. The work

### ELE46703 TEST #1 Take-Home Solutions Prof. Guvench...

ELE46703 TEST #1 Take-Home Solutions Prof. Guvench... Problem 1 : Light Emitting Diode (60 pts.) Consider a GaAs pn junction which has the following properties. N a 10 16 cm -3 (p-side), N d 10 19 cm -3

### Determination of properties in semiconductor materials by applying Matlab

Determination of properties in semiconductor materials by applying Matlab Carlos Figueroa. 1, Raúl Riera A. 2 1 Departamento de Ingeniería Industrial. Universidad de Sonora A.P. 5-088, Hermosillo, Sonora.

### Objective: The purpose of these notes is to familiarize students with semiconductors and devices including the P-N junction, and the transistors.

- 1-3/4/02C:\lec320.doc H.L.Kwok SEMICONDUCTOR MATERIALS AND DEVICES by H.L. Kwok Objective: The purpose of these notes is to familiarize students with semiconductors and devices including the P-N junction,

### Scintillation Detectors

Scintillation Detectors J.L. Tain Jose.Luis.Tain@ific.uv.es http://ific.uv.es/gamma/ Instituto de Física Corpuscular C.S.I.C - Univ. Valencia Scintillation detector: SCINTILLATION MATERIAL LIGHT-GUIDE

### Semiconductor Optoelectronics Prof. M. R. Shenoy Department of Physics Indian Institute of Technology, Delhi

Semiconductor Optoelectronics Prof. M. R. Shenoy Department of Physics Indian Institute of Technology, Delhi Lecture - 1 Context and Scope of the Course (Refer Slide Time: 00:44) Welcome to this course

### Cathodoluminescence of Rare Earth Ions in Semiconductors and Insulators

p. 1/1 Cathodoluminescence of Rare Earth Ions in Semiconductors and Insulators Leon Maurer International Materials Institute for New Functionality in Glass and Lehigh University Department of Physics REU

### AlxIn1-x As ysb1-y photodiodes with low avalanche breakdown temperature dependence

Vol. 25, No. 20 2 Oct 2017 OPTICS EXPRESS 24340 AlxIn1-x As ysb1-y photodiodes with low avalanche breakdown temperature dependence ANDREW H. JONES,1 YUAN YUAN,1 MIN REN,1 SCOTT J. MADDOX,2 SETH R. BANK,2

### Laser 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

### Lasers E 6 E 4 E 3 E 2 E 1

Lasers Laser is an acronym for light amplification by stimulated emission of radiation. Here the process of stimulated emission is used to amplify light radiation. Spontaneous emission: When energy is