期刊
APPLIED PHYSICS LETTERS
卷 101, 期 14, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4757127
关键词
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资金
- NSFC [51172041, 60907016]
- Program for New Century Excellent Talents in University [NCET-11-0615]
- 973 Program [2012CB933703]
- Jilin Province [20121802, 201201061, 20100339]
- Fundamental Research Funds for the Central Universities [11CXPY004, 11QNJJ011, 11SSXT128]
Localized surface plasmon (LSP)-enhanced ultraviolet light-emitting diodes were manufactured by introducing Ag nanoparticles and MgO spacer layer into n-ZnO/i-ZnO/p-GaN heterostructures. By optimizing the MgO thickness, which can suppress the undesired charge transfer and nonradiative Forster resonant energy transfer between Ag and ZnO, a 7-fold electroluminescence enhancement was achieved. Time-resolved and temperature-dependent photoluminescence measurements reveal that both spontaneous emission rate and internal quantum efficiency are increased as a result of coupling between ZnO excitons and Ag LSPs, and simple calculations, based on experimental data, also indicate that most of LSP's energy can be converted into the photon energy. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4757127]
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