Chapter 5. pn Junction Electrostatics

Slides:



Advertisements
Similar presentations
1 Chapter 5-1. PN-junction electrostatics You will also learn about: Poisson’s Equation Built-In Potential Depletion Approximation Step-Junction Solution.
Advertisements

Chapter 6-1. PN-junction diode: I-V characteristics
ECE 663 P-N Junctions. ECE 663 So far we learned the basics of semiconductor physics, culminating in the Minority Carrier Diffusion Equation We now encounter.
ECE 4339: Physical Principles of Solid State Devices
Integrated Circuit Devices
Semiconductor Device Physics Lecture 6 Dr. Gaurav Trivedi, EEE Department, IIT Guwahati.
© 2012 Eric Pop, UIUCECE 340: Semiconductor Electronics ECE 340 Lectures P-N diode in equilibrium So far we studied:  Energy bands, doping, Fermi.
p – n junction barrier height,
OUTLINE pn junction I-V characteristics Reading: Chapter 6.1
EE105 Fall 2011Lecture 3, Slide 1Prof. Salahuddin, UC Berkeley Lecture 3 OUTLINE Semiconductor Basics (cont’d) – Carrier drift and diffusion PN Junction.
Chapter V July 15, 2015 Junctions of Photovoltaics.
Drift and Diffusion Current
CHAPTER 4: P-N JUNCTION Part I.
Spencer/Ghausi, Introduction to Electronic Circuit Design, 1e, ©2003, Pearson Education, Inc. Chapter 2, slide 1 Introduction to Electronic Circuit Design.
President UniversityErwin SitompulSDP 11/1 Lecture 11 Semiconductor Device Physics Dr.-Ing. Erwin Sitompul President University
Electronics The fifth and Sixth Lectures
Recall-Lecture 3 Atomic structure of Group IV materials particularly on Silicon Intrinsic carrier concentration, ni.
PN-junction diode: I-V characteristics
Recall-Lecture 3 Atomic structure of Group IV materials particularly on Silicon Intrinsic carrier concentration, ni.
ECE 333 Linear Electronics
Lecture #14 OUTLINE Midterm #1 stats The pn Junction Diode
Chapter 6. pn Junction Diode
Recall-Lecture 4 Current generated due to two main factors
Lecture 10 OUTLINE pn Junction Diodes (cont’d)
Lecture 10 OUTLINE pn Junction Diodes (cont’d)
BSIC SEMICOCONDUCTOR CONCEPTS INTRINSIC SILICON:
7 pn Junction Diode: Small-signal Admittance
Recall-Lecture 4 Current generated due to two main factors
P-N Junctions ECE 663.
CHAPTER 4: P-N JUNCTION Part I.
P-n Junctions ECE 2204.
7 pn Junction Diode: Small-signal Admittance
CHAPTER 4: P-N JUNCTION Part 2
Announcements HW1 is posted, due Tuesday 9/4
Electronics The fifth and Sixth Lectures
Recall-Lecture 3 Atomic structure of Group IV materials particularly on Silicon Intrinsic carrier concentration, ni.
Lecture #12 OUTLINE Metal-semiconductor contacts (cont.)
Recall-Lecture 4 Current generated due to two main factors
4.4.6 Gradients in the Quasi-Fermi Levels
ECE 333 Linear Electronics
Lecture #17 OUTLINE pn junctions (cont’d) Reverse bias current
EE130/230A Discussion 5 Peng Zheng.
pn Junction Diodes: I-V Characteristics
Deviations from the Ideal I-V Behavior
Chapter 7, PN Junction 22 and 24 February 2016
pn Junction Electrostatics
Chapter 1 – Semiconductor Devices – Part 2
Physics of Bipolar Junction Transistor
PN Junction Electrostatics
Physics of Bipolar Junction Transistor
pn Junction Electrostatics
Lecture 10 OUTLINE pn Junction Diodes (cont’d)
Lecture 7 OUTLINE Work Function Metal-Semiconductor Contacts
Lecture 3 OUTLINE Semiconductor Basics (cont’d) PN Junction Diodes
Lecture 10 OUTLINE pn Junction Diodes (cont’d)
Lecture 9 OUTLINE pn Junction Diodes Electrostatics (step junction)
Chapter 7, PN Junction 25 and 27 February 2015
Lecture 10 OUTLINE pn Junction Diodes (cont’d)
QUIZ 4 SUPPORT Key Slides From Class Presentations 1 April 2015
Lecture 9 OUTLINE pn Junction Diodes Electrostatics (step junction)
Lecture 9 OUTLINE pn Junction Diodes Electrostatics (step junction)
Chapter 7, PN Junction 27 February and 1 March 2019
BSIC SEMICOCONDUCTOR CONCEPTS INTRINSIC SILICON:
ECE 340 Lecture 23 Current Flow in P-N diode
Chapter 7, PN Junction 17 and 20 February 2017
PN-JUNCTION.
Notes 4 March 2013 Start Chapter 7, “pn Junction”
L.
Jan 16, 2018 Lecture Instructor: Weng Cho Chew
Chapter 3 Solid-State Diodes and Diode Circuits
Presentation transcript:

Chapter 5. pn Junction Electrostatics Preliminaries Quantitative Electrostatic Relationships

※Doping profile : ND - NA 5. pn Junction Electrostatics pn junction ※Doping profile : ND - NA

◆ Step junction & Linearly graded junction 5. pn Junction Electrostatics ◆ Step junction & Linearly graded junction

◆ Contact Potential (Built-in Potential) : Vo or Vbi 5. pn Junction Electrostatics ◆ Contact Potential (Built-in Potential) : Vo or Vbi

5. pn Junction Electrostatics

◆ Poisson's Equation *charge density – in the case of fully ionized 5. pn Junction Electrostatics ◆ Poisson's Equation *charge density – in the case of fully ionized

5. pn Junction Electrostatics Integrating At equilibrium, (2)→(1)

5. pn Junction Electrostatics

Quantitative Electrostatic Relationships 5. pn Junction Electrostatics Quantitative Electrostatic Relationships ◆ Assumptions/Definitions

◆ Step Junction with VA = 0 5. pn Junction Electrostatics ◆ Step Junction with VA = 0 E = 0 outside of the depletion region p- side of depletion region

n-side of depletion region 5. pn Junction Electrostatics n-side of depletion region

p- side of depletion region 5. pn Junction Electrostatics p- side of depletion region n- side of depletion region

from : depletion region, space charge region 5. pn Junction Electrostatics from : depletion region, space charge region : charge neutrality within the depletion region

5. pn Junction Electrostatics (4), (5) → (3)

5. pn Junction Electrostatics

5. pn Junction Electrostatics

5. pn Junction Electrostatics

Total current diffusion + drift V < 0 5. pn Junction Electrostatics Total current diffusion + drift V < 0 I(gen.) due to EHP generation or minority carriers V = 0 V > 0 where I0 : I(gen.) - I0 : reverse saturation current (4) current flows : in the forward direction no current flows : in the reverse direction

◆ Step Junction with VA≠0 5. pn Junction Electrostatics ◆ Step Junction with VA≠0   - Applied Voltage bias VA across the transition region(W) of the junction     - Change electrostatic potential barrier     - Change the electric field in the transition region     - Separation of the energy band     - Change the width of the depletion region

5. pn Junction Electrostatics

5. pn Junction Electrostatics