Elimination of total internal reflection in GaInN light-emitting diodes by graded-refractive-index micropillars
SCIE
SCOPUS
- Title
- Elimination of total internal reflection in GaInN light-emitting diodes by graded-refractive-index micropillars
- Authors
- Kim, JK; Noemaun, AN; Mont, FW; Meyaard, D; Schubert, EF; Poxson, DJ; Kim, H; Sone, C; Park, Y
- Date Issued
- 2008-12-01
- Publisher
- AMER INST PHYSICS
- Abstract
- A method for enhancing the light-extraction efficiency of GaInN light-emitting diodes (LEDs) by complete elimination of total internal reflection is reported. Analytical calculations show that GaInN LEDs with multilayer graded-refractive-index pillars, in which the thickness and refractive index of each layer are optimized, have no total internal reflection. This results in a remarkable improvement in light-extraction efficiency. GaInN LEDs with five-layer graded-refractive-index pillars, fabricated by cosputtering TiO(2) and SiO(2), show a light-output power enhanced by 73% and a strong side emission, consistent with analytical calculations and ray-tracing simulations.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/9615
- DOI
- 10.1063/1.3041644
- ISSN
- 0003-6951
- Article Type
- Article
- Citation
- APPLIED PHYSICS LETTERS, vol. 93, no. 22, 2008-12-01
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