Enhancement of the light extraction of GaN-based green light emitting diodes via nanohybrid structures
- Title
- Enhancement of the light extraction of GaN-based green light emitting diodes via nanohybrid structures
- Author
- 박진섭
- Keywords
- Light emitting diode; Extraction efficiency; ZnO nanorods; Morphology; ZNO NANOSTRUCTURES; EFFICIENCY; SURFACE; ARRAYS; LEDS
- Issue Date
- 2013-05
- Publisher
- 한국물리학회
- Citation
- CURRENT APPLIED PHYSICS 권: 13 호: 6 페이지: 1042-1045
- Abstract
- Improvement in the light extraction efficiency (LEE) of GaN-based green light emitting diodes (LEDs)with ZnO nanostructures synthesized by a hydrothermal method is reported. Formation of ZnO nanorods,hemispheres, and cones was controlled by varying the pH of the aqueous synthesis solution. The shape of the ZnO nanostructures integrated onto the LEDs shows a strong relationship with the LEE characteristics of GaN-based green LEDs. The electroluminescence (EL) intensity of LEDs covered by ZnO nanostructures increased compared to conventional LEDs. In terms of LEE, LEDs with surface-textured ZnO hemispheres showed the highest EL intensity, which can be attributed to an increase in the effective critical angle, the escape cone, and multiple scattering. Finite difference time domain (FDTD)simulation was conducted to theoretically confirm the experimental results.
- URI
- http://www.sciencedirect.com/science/article/pii/S1567173913000916?via%3Dihub
- ISSN
- 1567-1739
- DOI
- 10.1016/j.cap.2013.02.010
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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