Giant enhancement of bandgap emission of ZnO nanorods by platinum nanoparticles
Giant enhancement of bandgap emission of ZnO nanorods by platinum nanoparticles
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DOI：
10.1088/0957-4484/17/17/017
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发表时间：
2006-09-14
期刊：
影响因子：
3.5
通讯作者：
Chen, Yang Fang
中科院分区：
文献类型：
--
作者：
Lin, Jian Ming;Lin, Hsia Yu;Chen, Yang Fang
通过形成ZnO和Pt纳米复合材料，可以大大增强带隙发射，而将缺陷发射抑制到噪声水平。带隙与缺陷发射之间的光致发光强度比可提高103倍。带隙发射增强和缺陷发射猝灭背后的潜在机制是Pt纳米粒子中缺陷之间的能量传递和表面等离子体共振以及ZnO纳米棒中电子空穴对的产生和重组的结合。我们的研究结果将对高效光电器件的制造商非常有用。
By the formation of ZnO and Pt nanocomposites, it is found that the bandgap emission can be greatly enhanced, while the defect emission is suppressed to the noise level. The photoluminescence intensity ratio between the bandgap and defect emission can be improved by up to 103 times. The underlying mechanism behind enhancement of the bandgap emission and quenching of the defect emission is a combination of the energy transfer between defects and surface plasmon resonance in Pt nanoparticles, as well as electron - hole pair generation and recombination in the ZnO nanorods. Our results will be very useful to manufacturers of highly efficient optoelectronic devices.