Generalized Monte Carlo Presentation

20 Jun 2011 | Teaching Materials | Contributor(s): Dragica Vasileska

This presentation goes along with the Bulk Monte Carlo tool on the nanoHUB that calculates transients and steady-state velocity-field characteristics of arbitrary materials such as Si, Ge, GaAs, GaN, SiC, etc. The tool employs a non-parabolic bandstructure.

Optimize Solar Cells

10 Feb 2011 | Teaching Materials | Contributor(s): Dragica Vasileska

In this presentation different avenues used to enhance the performance of solar cells are explained.

Modeling of Light Emitting Diodes with SILVACO

07 Feb 2011 | Teaching Materials | Contributor(s): Dragica Vasileska

Simulation of LEDs with SILVACO is presented.

SILVACO Simulation of Solar Cells

07 Feb 2011 | Teaching Materials | Contributor(s): Dragica Vasileska

This set of lecture notes describes the SILVACO simulation of Solar Cells. In particular, emphasis is placed on the module LUMINOUS.

Solution of the Boltzmann Equation under low-field conditions

05 Feb 2011 | Teaching Materials | Contributor(s): Dragica Vasileska

In this presentation it is explained clearly when one can use the relaxation approximation and when one needs to use Rode's iterative method to calculate the low-field mobility in semiconductors. At the end examples are given of the effective and Hall mobilities which, as can be seen from the …

Acoustic Phonon Scattering Explained

05 Feb 2011 | Teaching Materials | Contributor(s): Dragica Vasileska

In this lecture notes we derive and explain acoustic deformation potential scattering as it applies to transport calculations in covalent semiconductors.

Boltzmann Transport Equation and Scattering Theory

01 Feb 2011 | Teaching Materials | Contributor(s): Dragica Vasileska

In this presentation we give simple derivation of the Boltzmann transport equation, describe the derivation of Fermi's Golden Rule, and present the derivation of most common scattering mechanisms in semiconductors.

MOSFET Lab - Scaling

03 Jan 2011 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Gerhard Klimeck, Dragica Vasileska

The concept of device scaling and the need to control short channel effects is used in this real life problem

ABACUS: Test for MOSFET Tool

18 Oct 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

The objective of this test is to give an idea to a self-learning students or to instructors in the case this test is used in a classroom the level of understanding of this topic when students have gone through the learning material, worked exercises and have completed the assignments and the …

Verification of the Validity of the MOSFET Tool

11 Oct 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

Output characteristics of a bulk MOSFET are computed using MOSFET lab and compared with an analytical model based on Bulk-Charge theory. Parasitic resistance is used as a fitting parameter in the analytical model. MATLAB script used for verification is also available for download.

ABACUS: Test for BJT lab Tool

06 Oct 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

The objective of this test is to give an idea to a self-learning student or to instructors in the case this test is used in a classroom the level of understanding of this topic when students have gone through the learning material, worked exercises and have completed the assignments and the …

Verification of the Validity of the BJT Tool

24 Aug 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

A pnp BJT in Common-Base configuration is analyzed both analytically and numerically using BJT Lab. DC current gain and Output characteristics are computed.MATLAB script used is also available for download.

MOSCAP Worked out problems (Basic)

19 Aug 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

A simple MOSCAP is analyzed under different operation modes namely: Accumulation, near threshold and Inversion.

Drift Diffusion Lab Worked out problems (Drift)

18 Aug 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

This sample worked out problem illustrated the concept of mobility. Mobility values are computed for different material and doping levels.

Drift Diffusion - Temperature Sensor

16 Aug 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

The fact that mobility of a semiconductor varies with temperature is used to design a temperature sensor in this test.

Worked Examples for Carrier Statistics (basic)

16 Aug 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

Several worked out examples are presented that illustrate the basic concept of carrier concentration in semiconductors.

ABACUS: Test for MOSCAP Tool

16 Aug 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

The objective of this test is to give an idea to a self-learning students or to instructors in the case this test is used in a classroom the level of understanding of this topic when students have gone through the learning material, worked exercises and have completed the assignments and the …

Worked Examples for Carrier Statistics (advanced)

16 Aug 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

Two worked out examples based on Fermi-Dirac Vs Maxwell-Boltzmann statistics and temperature effects are presented.

Drift Diffusion Lab Worked out problems (Diffusion)

16 Aug 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

A sample problem is worked out using Drift-Diffusion lab. The problem statement deals with the concept of diffusion in semiconductors.

ABACUS: Test for Drift Diffusion Lab

12 Aug 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

The objective of this test is to give an idea to a self-learning students or to instructors in the case this test is used in a classroom the level of understanding of this topic when students have gone through the learning material, worked exercises and have completed the assignments and the …

Verification of the Validity of the Drift-Diffusion Lab Tool

11 Aug 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

Drift-Diffusion Lab results are verified analytically. In the first test minority carrier concentration is computed in a semiconductor slab with constant carrier Generation rate (/cm3.s). In the second test bias is applied across a semiconductor slab and current is computed both analytically and …

Verification of the Validity of the MOSCap Tool

11 Aug 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

Numerical results for Surface Potential Vs Gate Bias are compared with analytical results to prove the validity of MOSCap Lab.

Carrier Statistics Tool Verification

10 Aug 2010 | Teaching Materials | Contributor(s): Saumitra Raj Mehrotra, Dragica Vasileska, Gerhard Klimeck

This test verifies the Carrier Statistics Tool by comparing the numerically computed and analytically extracted, electron and hole carrier densities. The results are close within 2% of margin.

Verification of the Validity of Bulk Bandstructure Lab

10 Aug 2010 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

This set of slides compares the optical gaps for Si, Ge and GaAs with those given in www.ioffe.ru, thus verifying the validity of the bulk Bandstructure Lab tool.

ABACUS: Test for Bandstructure Lab

10 Aug 2010 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

This is a test that examines ones understanding of electronic structure once he/she has gone through the materials and exercises provided on the nanoHUB as part of the ABACUS Bandstructure topic page and running the Bandstructure Lab.