Light‐Extraction Enhancement of GaInN Light‐Emitting Diodes by Graded‐Refractive‐Index Indium Tin Oxide Anti‐Reflection Contact

J. K. Kim, Sameer Chhajed, M. F. Schubert, E. F. Schubert, A. J. Fischer, Mary H. Crawford, Jaehee Cho, Hyonchol Kim, Cheolsoo Sone

Advanced Materials · 2008 · 298 citations · 19 references

Concepts

Abstract

GaInN LEDs with a six-layer graded- refractive-index antireflection coating made entirely of indium tin oxide (ITO) are demonstrated to have 24.3 % higher light output than LEDs with dense ITO coating. The increased light-output of the LEDs with graded-refractive-index antireflection coating is attributed to the virtual elimination of Fresnel reflection and surface roughening of low-refractive index ITO.

References

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