Enhancement of light extraction in GaN-based light-emitting diodes by Al2O3-coated ZnO nanorod arrays
- Title
- Enhancement of light extraction in GaN-based light-emitting diodes by Al2O3-coated ZnO nanorod arrays
- Author
- 박진섭
- Keywords
- GaN; Al2O3/ZnO; Al2O3/ZnO
- Issue Date
- 2014-08
- Publisher
- ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
- Citation
- Journal Of Alloys And Compounds, 2014, 611, p157-160
- 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. (C) 2014 Elsevier B.V. All rights reserved.
- URI
- https://www.sciencedirect.com/science/article/pii/S0925838814010858?via%3Dihubhttp://hdl.handle.net/20.500.11754/46994
- ISSN
- 0925-8388
- DOI
- 10.1016/j.jallcom.2014.05.019
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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