Spring 2013: EEE 591: Advanced Junction Theory and Concepts
Overview
The performance of a solar cell depends on the intrinsically on the parameters of the junction. The goal of the class is to expand the understanding and analysis of junctions from the relatively ideal cases typically considered to include advanced concepts and approaches. The goals of the class are to first analyze pn junctions and include nonidealities such as surface recombination; injectionlevel or dopingdependence; and material parameters which are time, spatially or temperature dependent. The class then covers advanced topics in junctions, such as multijunctions and the tunnel junctions between them; the physics of heterojunctions; and other junctions such Schottky diodes, Ohmic contacts and MIS approaches. Finally, the course examines new concepts in junction theory such as induced junctions, and carrier or energy selective contacts.
Students will be expected to analyze junctions, with the goal of understanding the dominant physical mechanism in a solar cell and predicting its performance, using a combination of band diagrams, analytical equations, and numerical modeling. In addition, the course will cover characterization approaches to determine the critical parameters needed for an understanding of the material parameters.
Course Details
 Session A: The course is run in Session A; meaning that it runs at an accelerated pace and finishes February 27, 2013.
 Instructor: Dr. Christiana Honsberg & Dr. Marian Bertoni
 Times and Location: TBD
Course Textbook and Resources
The course will use sections from a several textbook, as well as course notes. Further, the course will use an online textbook, http://www.pveducation.org/pvcdrom/. Other references include:
 Papers will assigned for topics from Week 2 onwards
 Stephen Fonash; Solar Cell Physics
 R.F. Pierret, Modular Series on Solid State Devices
Grading
Assessment

Total

Homework, 7 at 7% each

49%

TakeHome MidSession

20%

Final Project (25% technical, 6% presentation)

31%

Syllabus
Week

Class

Class Content

Assessment

Week 1 Jan 7

Class 1

Introduction; Review Semiconductor Properties and physical origin of material parameters

HW1 handed out


Class 2

Review Ideal Pn Junction operation; Basic Semiconductor Equations; Ideal Diode Equation; Spatial J_{0} dependence

HW 1 due
HW 2 handed out

Week 2 Jan 14^{th}

Class 1

Nonideal diode equation; Surface recombination processes equations;

HW 2 due
HW 3 handed out


Class 2

Impacts, measurement of minority carrier lifetime; PC1D


Week 3 Jan 21^{st}

Class 1

Nonidealities; injection level, temperature dependencies of material parameters

HW 3 due
HW 4 handed out


Class 2

Heterojunction pn junctions; band diagram and equations;


Week 4 Jan 28^{th}

Class 1

Calculation and band diagrams for heterojunction; transport

HW 2 due
HW 3 handed out 

Class 2

Tunnel junctions; Ohmic contacts; Schottky contacts

HW 3 due

Week 5
Feb 4^{th}

Class 1

Other junction concepts; MIS; induced junctions



Class 2

Band diagrams and calculations for multiple junctions, including integration of different types of junctions

MidSession Due
HW 4 handed out

Week 6
Feb 11

Class 1

Characterization of concepts and measurement of injection or other variations in material parameters

HW 4 due
HW 5 handed out


Class 2

Calculation of parameters for characterization approaches; calculation of QE; lifetime

HW 5 due
HW 6&7 handed out

Week 7
Feb 18^{th}

Class 1

Numerical simulation approaches; Device model with injection level parameters;

HW 6 due


Class 2

closed form equations; hydrodynamic; other approaches

HW 7 due

Week 8
Feb 25^{th}

Class 1

Review

Class Presentations

Feb 27^{th}



Project Due
