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Enhancement of light extraction in GaN-based light-emitting diodes by Al2O3-coated ZnO nanorod arrays
- Authors
- Park, Jinsub; Shin, Dong Su; Kim, Do-Hyun
- Issue Date
- Oct-2014
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- GaN; Light-emitting diodes; Al2O3/ZnO; Nano-hybrid; Light extraction
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.611, pp.157 - 160
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 611
- Start Page
- 157
- End Page
- 160
- ISSN
- 0925-8388
- Abstract
- We report on the improvement of light extraction efficiency in blue light-emitting diodes (LEDs) by the use of Al2O3/ZnO core/shell nanorods (NRs) grown on the surface of the LED epi-structure. The electroluminescence intensity at a current injection of 20 mA of LEDs with 40 nm-thick Al2O3-coated ZnO NR arrays is 2.1 and 4.0 times than those of LEDs with bare ZnO NRs and no NRs, respectively. The enhanced light extraction of LEDs with Al2O3-coated ZnO NRs can be attributed to an increase in transmission and improved light extraction probability for photons generated in blue LEDs due to a reduction of Fresnel reflection loss.
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Related Researcher
- Park, Jinsub
- COLLEGE OF ENGINEERING (SCHOOL OF ELECTRONIC ENGINEERING)