SiLENSe - Simulator for Light Emitters based on Nitride Semiconductors—software tool for light emitting diode (LED) bandgap engineering
The software tool, Simulator of Light Emitters based on Nitride Semiconductors (SiLENSe), is offered for modeling band diagrams and characteristics of light emitting diodes (LEDs) based on group-III nitrides. The SiLENSe software provides researchers with exhaustive information about complex physical processes responsible for the operation of group-III nitride-based LEDs. The code provides the most important properties of an LED heterostructure.
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Supported Technologies
Windows XP/2000/NT
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Pricing
- Unspecified -
silense@semitech.us
+1 804 304 8092
Additional Product Information
1.Overview
The software tool, Simulator of Light Emitters based on Nitride Semiconductors (SiLENSe), is offered for modeling band diagrams and characteristics of light emitting diodes (LEDs) based on group-III nitrides. The SiLENSe software provides researchers with exhaustive information about complex physical processes responsible for the operation of group-III nitride-based LEDs.
The code provides the following properties of an LED heterostructure:
·Band diagram of a nitride LED at various biases
·Distribution of electron and hole concentrations in the device structure
·Electric field distribution
·Radiative and non-radiative recombination rates
·Current-voltage (I-V) characteristic
·Internal light emission efficiency as a function of current density
·Wave functions of electrons and holes in a quantum-well active region
·Light emission spectra of the LED
2.Underlying physics
The LED operation is considered within the 1D drift-diffusion model of carrier transport in the heterostructure that accounts for specific features of the nitride semiconductors - strong piezoeffect, existence of spontaneous electric polarization, low efficiency of acceptor activation, and high threading dislocation density (normally, ~1e7-1e9 cm-2) in the material. Additionally, the code is capable of modeling graded-composition heterostructures, which is important in view of the use of bandgap engineering principles.
3.Interface
The SiLENSe software has a friendly graphical user interface (GUI) which is aimed at minimization of the user efforts needed for starting simulations. Using the GUI, user can specify the LED structure and main computational grid, change the default materials properties, and run computations. The main computational grid has a variable density that can be flexibly adjusted by a number of alternative ways.
4.Database of materials properties
The code is provided with an internal database of materials properties necessary for simulations. The database can be modified by user and stored within each individual simulation project.