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Drift-Diffusion Lab

Simulate single semiconductor characteristics

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Version 1.8.3 - published on 16 Aug 2010

doi:10.4231/D36Q1SG88 cite this

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First-Time User Guide View All Supporting Documents

Bias_option Bias_Potential Light_edge Excess_carrier Light_top_option Energy_band_light_top

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Abstract

This tool 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 on the semiconductor, applying bias, or both can be performed. This tool provides important information about carrier densities, transient and steady state currents, fermi-levels and electrostatic potentials.
    Typical simulation runtime : Less than a minute
    Improvements / modifications in subsequent version releases:
  • 1.8.3 - Added Field dependent and Concentration dependent mobility.
  • 1.8.2 - Fixed for overwriting of previous simulation runs.
  • 1.8.1 - 'Net Recombination' plot changed to 'Net Thermal Recombination' plot. Photo-generation rate is not included in the calculation.
  • 1.8 - Fixed potential plot for 'Bias only' case to show zero slope at equilibrium. Fixed recombination rate plot - It now reads 'Net Recombination' (+ve values mean net recombination & -ve values mean net generation in the bar).
  • 1.7 - Meshing made robust to treat different examples.
  • 1.6 - Added option for solution of Electrons and Holes simultaneously (Ambipolar), Electron only & Hole only contunuity equations. Fixed for improved meshing.
  • 1.5 - Updated to include carrier mobility in the input deck. Fixed for Absorption length for light shine experiments. Corrected for carrier concentration near edges with No Surface recombination at both ends.
  • 1.4 - Included status bar for running simulations.
  • 1.32 - Changed penetration depth for light shine at the edge. Thin penetration is allowed now.
  • 1.131 - Fixed for minor error in meshing. Accurate definition of mesh with light shine option.
  • 1.13 - Fixed for error in Surface Recombination Velocity (cm/s) at the contacts and added another tab to for it. Recombination velocity can now be defined for electrons and holes and at both contacts separately.
  • 1.11 - Added Surface Recombination Velocity (cm/s) in input deck .
  • 1.1 - Updated for GUI. Carrier Generation Rate (/cm2/s) with light shine is user defined. Added Current density in output plot J(x)
  • 1.0 - 1D linear Drift-Diffusion simulator launched.

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Cite this work

Researchers should cite this work as follows:

  • Gerhard Klimeck; Saumitra Raj Mehrotra; Nicholas I Kisseberth; Abhijeet Paul (2010), "Drift-Diffusion Lab," http://nanohub.org/resources/semi. (DOI: 10.4231/D36Q1SG88).

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