Improvement of photon extraction efficiency of GaN-based LED using micro and nano complex polymer structures
- Authors
- Cho, Joong-Yeon; Byeon, Kyeong-Jae; Park, Hyoungwon; Kim, Jinseung; Kim, Hyeong-Seok; Lee, Heon
- Issue Date
- 31-10월-2011
- Publisher
- SPRINGEROPEN
- Citation
- NANOSCALE RESEARCH LETTERS, v.6
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANOSCALE RESEARCH LETTERS
- Volume
- 6
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/111341
- DOI
- 10.1186/1556-276X-6-578
- ISSN
- 1931-7573
- Abstract
- A micro-and nanoscale complex structure made of a high refractive index polymer (n = 2.08) was formed on the ITO electrode layer of an edge-emitting type GaN blue light-emitting diode (LED), in order to improve the photon extraction efficiency by suppressing total internal reflection of photons. The nanoimprint lithography process was used to form the micro-and nanoscale complex structures, using a polymer resin with dispersed TiO2 nanoparticles as an imprint resin. Plasma processing, such as reactive ion etching, was used to form the micro-and nano-scale complex structure; thus, plasma-induced damage to the LED device can be avoided. Due to the high refractive index polymeric micro-and nanostructure on the ITO layer, the electroluminescence emission was increased up to 20%, compared to an identical LED that was grown on a patterned sapphire substrate to improve photon extraction efficiency.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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