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Optica Publishing Group
  • Journal of Display Technology
  • Vol. 3,
  • Issue 2,
  • pp. 133-148
  • (2007)

Optimization of Light-Diffracting Photonic-Crystals for High Extraction Efficiency LEDs

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Abstract

Photonic-crystal (PhC)-assisted light extraction is a promising method for ultrahigh efficiency, planar light-emitting diodes (LEDs). However, modeling of such structures is challenging due to the variety of their parameters and the heavy computational burden they represent. We present a thorough theoretical discussion of the optimization of PhC LEDs, which relies both on approximate treatments and on rigorous 3-D calculations. Two material systems (GaAs and GaN) are investigated, leading to quite different optimal regimes. Notably, it appears that besides the properties of the 2-D PhC itself, design of the vertical structure plays a major role in optimization.

© 2007 IEEE

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