## ECE 656: Electronic Transport in Semiconductors (Fall 2009)

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#### Abstract

**Fall 2009**

**PLEASE NOTE:**[Click Here] - A more recent teaching of this course is available.

This is a course about how charge flows in semiconductors with an emphasis on transport in nanoscale devices. The course consists of three main parts. Part 1 focuses on near-equilibrium transport in the presence of small gradients in the electrochemical potential or temperature, with or without the application of a small magnetic field. The emphasis in Part 2 is on the physics of carrier scattering and how the microscopic scattering processes are related to macroscopic relaxation times and mean-free-paths. Part three examines high-field transport in bulk semiconductors and so-called “non-local” transport in sub-micron devices. The course concludes with a brief introduction to quantum transport. The objective of the course is to develop a broad understanding of the basic concepts needed to understand modern electronic devices. It is designed for those who work on electronic devices – whether they are experimentalists, device theorists, or computationalists. The course is intended to be accessible to students with a general, introductory background in semiconductors, such as that obtained by taking ECE-606: *Solid State Physics* at Purdue University.

**Course Structure**

- Course Introduction
- Part 1: Near-equilibrium transport:
- Low bias transport –the Landauer approach
- Low bias transport – the Boltzmann equation
- Percolative transport

- Part 2: Carrier scattering
- Relaxation times and lengths
- Carrier scattering in semiconductors

- Part 3: High-field and non-local transport
- Balance equations
- Monte Carlo simulation
- Off-equilibrium transport in bulk semiconductors and devices

- Quantum transport

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#### References

*Fundamentals of Carrier Transport,*2nd Edition Mark Lundstrom, Cambridge University Press ISBN-13: 9780521637244 (paperback)*Advanced Semiconductor Fundamentals,*2nd Edition R.F. Pierret, Prentice Hall, ISBN 0-13-061792-X- Handouts and class notes will also be distributed from time to time

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#### Location

Purdue University, West Lafayette, IN