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Device design and simulation for GaN based dual wavelength LEDs.

Dong-Xue Wang1, Ian T Ferguson, John A Buck

  • 1School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA. mdxwang@gmail.com

Applied Optics
|April 10, 2013
PubMed
Summary

A new optical model simulates dual wavelength LEDs, incorporating material dispersion. This model optimizes LED design for enhanced light extraction efficiency.

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Area of Science:

  • Optoelectronics and Semiconductor Devices
  • Computational Physics and Materials Science

Background:

  • Dual wavelength Light Emitting Diodes (LEDs) require precise optical modeling for efficient performance.
  • Understanding the optical dispersion of semiconductor materials like Gallium Nitride (GaN), Indium Gallium Nitride (InGaN), and Aluminum Gallium Nitride (AlGaN) is crucial for accurate LED simulations.

Purpose of the Study:

  • To develop a comprehensive optical model for dual wavelength LEDs.
  • To incorporate the optical dispersion of key semiconductor materials into the numerical model.
  • To enable the calculation and optimization of LED light extraction efficiency.

Main Methods:

  • Development of a numerical optical model utilizing optical ray tracing programs.
  • Inclusion of optical dispersion data for GaN, InGaN, and AlGaN within the model.

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  • Simulation of LED device structures to assess light extraction efficiency.

    • Main Results:

    • A functional optical model capable of simulating dual wavelength LEDs has been established.
    • The model accurately accounts for the optical dispersion of relevant semiconductor materials.
    • The developed model allows for the calculation of light extraction efficiency based on device structure and material properties.

    Conclusions:

    • The comprehensive optical model provides a robust tool for analyzing dual wavelength LED performance.
    • The model facilitates the optimization of LED device structures to maximize light extraction efficiency.
    • This approach is valuable for the design and development of advanced LED technologies.