Improved light extraction efficiency and leakage characteristics in light-emitting diodes by nanorod arrays formed on hexagonal pits

Title
Improved light extraction efficiency and leakage characteristics in light-emitting diodes by nanorod arrays formed on hexagonal pits
Authors
박진섭
Keywords
Light-emitting diode; Etch pit; ZnO; Light extraction
Issue Date
2015-01
Publisher
ELSEVIER SCI LTD
Citation
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, v. 29, Page. 380-385
Abstract
We report the enhancement of light extraction efficiency (LEE) and electrical performance in GaN-based green light-emitting diodes (LEDs) using ZnO nanorods formed on the etched surface of p-GaN. Green LEDs with hybrid ZnO nanorod structures grown on the hexagonally etched topmost layer of the LEDs, show an improvement in electroluminescence intensity that is 3.5 times higher than LEDs without any other surface treatments. The improvement in LEE in LEDs with nanohybrid structures was confirmed by finite-difference time-domain simulation analysis. Besides LEE enhancement, the surface etching effects on the reduction of leakage current of fabricated LEDs were also investigated. (C) 2014 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/20.500.11754/21384http://www.sciencedirect.com/science/article/pii/S1369800114004405
ISSN
1369-8001
DOI
http://dx.doi.org/10.1016/j.mssp.2014.08.005
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > DEPARTMENT OF ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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