ABACUS - Assembly of Basic Applications for Coordinated Understanding of Semiconductors
Carrier Statistics Lab in ABACUS
The Carrier Statistics Lab in ABACUS demonstrates electron and hole-density distributions based on the Fermi-Dirac and Maxwell-Boltzmann equations. This tool shows the dependence of carrier density, density of states and occupation factor on temperature and fermi level. The user can choose between doped and undoped semi-conductors. silicon, germanium, and gallium arsenide can be studied as a function of doping or Fermi level, and temperature. The Carrier Statistics Lab is supported by a homework assignment in which students are asked to explore the differences between Fermi-Dirac and Maxwell-Boltzmann distributions, compute electron and hole concentrations, study temperature dependences, and the phenomenon of freeze-out.
First time use of the tool is supported by: Carrier Statistics Lab: First-Time User Guide
- Exercise: MATLAB Tool Construction for Degenerate/Nondegenerate Semiconductors That Includes Partial Ionization of the Dopants
- Exercise: Dopants and Semiconductor Statistics
- Hall Effect - Theoretical Exercise
Carrier Statistics Lab Learning Materials – Comprehensive set of learning materials for the Carrier Statistics Lab.
Drift Diffusion Lab in ABACUS
The Drift Diffusion Lab in ABACUS enables users to understand the basic concepts of the drift and diffusion of carriers inside a semiconductor slab using different kinds of experiments. Experiments like shining light onto the semiconductor, applying bias, as well as both processes simultaneously, can be performed. This tool provides important information about carrier densities, transient and steady state currents, Fermi-levels and electrostatic potentials. It is supported by two related homework assignments #1 and #2 in which students are asked to explore the concepts of drift, diffusion, quasi Fermi-levels, and the response to light.
Drift-Diffusion Lab Learning Materials – Comprehensive set of learning materials for the Drift-Diffusion Lab.
There is a dedicated group page for Faculty Only, where further assignments and solutions are shared. Access to that group is granted on an individual basis.