22 February 2006 Omni-directional reflectors for light-emitting diodes
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Abstract
This article discusses possible solutions to limitations in light extraction efficiency of light-emitting diodes (LEDs) using new types of triple-layer omni-directional reflectors (ODRs). The ODRs have lower mirror losses than metal reflectors and distributed Bragg reflectors (DBRs). High-reflectivity ODRs have been incorporated into AlGaInP LEDs and GaInN LEDs. It is shown that the ODR significantly increases light extraction from ODR-LEDs as compared to reference LEDs employing a DBR or metal reflector. Other examples of innovative concepts to be presented include novel materials with unprecedented low-refractive index, which further enhance the optical properties of ODRs.
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Jong Kyu Kim, Jong Kyu Kim, J.-Q Xi, J.-Q Xi, E. Fred Schubert, E. Fred Schubert, } "Omni-directional reflectors for light-emitting diodes", Proc. SPIE 6134, Light-Emitting Diodes: Research, Manufacturing, and Applications X, 61340D (22 February 2006); doi: 10.1117/12.661563; https://doi.org/10.1117/12.661563
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