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|Title:||Enhancement of bandgap emission of Pt-capped MgZnO films: Important role of light extraction versus exciton-plasmon coupling|
|Authors:||Yang, W.F. |
|Source:||Yang, W.F., Xie, Y.N., Liao, R.Y., Sun, J., Wu, Z.Y., Wong, L.M., Wang, S.J., Wang, C.F., Lee, A.Y.S., Gong, H. (2012-06-18). Enhancement of bandgap emission of Pt-capped MgZnO films: Important role of light extraction versus exciton-plasmon coupling. Optics Express 20 (13) : 14556-14563. ScholarBank@NUS Repository. https://doi.org/10.1364/OE.20.014556|
|Abstract:||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. © 2012 Optical Society of America.|
|Source Title:||Optics Express|
|Appears in Collections:||Staff Publications|
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