Light output enhancement of light-emitting diodes with photonic crystal structure

New light-emitting diodes (LED) structure constituted by the photonic crystal (PhC) is presented, and the effects of structure parameters are investigated. Relying on the results of investigation, the structure parameters of photonic crystal LED are optimized. By Using the FDTD algorithm, the enhancement factor of photonic crystal LED is calculated efficiently, and the optimum values of structure parameters are obtained after numerical optimization. With the optimum photonic crystal structure, the output efficiency of LED is enhanced.

[1]  Joel R. Wendt,et al.  InGaN/GaN quantum-well heterostructure light-emitting diodes employing photonic crystal structures , 2004 .

[2]  Photonic Crystal Slab Waveguides Based on Antiresonant Reflecting Optical Waveguide Structures , 2009, Journal of Lightwave Technology.

[3]  K. H. Kim,et al.  III-nitride blue and ultraviolet photonic crystal light emitting diodes , 2004 .

[4]  Chih-Chiang Kao,et al.  Light-output enhancement in a nitride-based light-emitting diode with 22° undercut sidewalls , 2005, IEEE Photonics Technology Letters.

[5]  T. Baba,et al.  Efficiency enhancement in a light-emitting diode with a two-dimensional surface grating photonic crystal , 2004 .

[6]  S. Denbaars,et al.  Increase in the extraction efficiency of GaN-based light-emitting diodes via surface roughening , 2004 .

[7]  T. Mukai,et al.  Recent progress in group-III nitride light-emitting diodes , 2002 .

[8]  Paul S. Martin,et al.  High performance thin-film flip-chip InGaN–GaN light-emitting diodes , 2006 .

[9]  P. Leisher,et al.  Photonic crystal structure effect on the enhancement in the external quantum efficiency of a red LED , 2006, IEEE Photonics Technology Letters.

[10]  Yong-Hee Lee,et al.  Enhancement of light extraction from two-dimensional photonic crystal slab structures , 2002 .

[11]  Chen Hongda,et al.  Enhancement of Light Extraction of LED by Photonic Crystal Structures , 2006 .

[12]  D. H. Mash,et al.  Light-emitting diodes , 1977, Nature.

[13]  M. Koike,et al.  Development of high efficiency GaN-based multiquantum-well light-emitting diodes and their applications , 2002 .

[14]  H. Rigneault,et al.  Extraction of light from sources located inside waveguide grating structures. , 1999, Optics Letters.