期刊
OPTICS EXPRESS
卷 20, 期 13, 页码 14556-14563出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.20.014556
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资金
- Clean Energy Research Program under Singapore EDB [NRF2008EWT-CERP002-041, NUS R284-000-081-592]
- Du Pont Apollo
We present on a systematic study of the contribution of surface plasmon (SP) coupling and light extraction toward emission enhancement of Platinum (Pt) nano-patterns capped MgZnO films. Time resolved Photoluminescence (PL) results indicate that the Pt coating can greatly reduces the non-radiative recombination rate by passivation of surface states, making the decay slow down. Temperature dependence of the integrated photoluminescence intensity reveals that the Pt nano-patterns can offer a large amount of light transfer and scattering, which enormously increase the light extraction efficiency up to 3.8-fold. These results indicate that the increased light extraction efficiency caused by surface modification via Pt coating rather than SP coupling plays a dominant role in increasing bandgap emission of MgZnO film. (C)2012 Optical Society of America
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