Enhanced photoluminescence of gallium phosphide by surface plasmon resonances of metallic nanoparticles

Enhanced photoluminescence of gallium phosphide by surface plasmon resonances of metallic nanoparticles
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通过金属纳米颗粒的表面等离子体共振增强磷化镓的光致发光

DOI:
10.1039/c5ra07368e
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发表时间:
2015-05
期刊:
影响因子:
3.9
通讯作者:
Liu, Duo
Liu, Duo
中科院分区:
化学3区
文献类型:
--
作者:
Gao, Naikun;Zuo, Zhiyuan;Xu, Xiangang;Liu, Duo

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我们在这里报告了金属金和银纳米粒子增强了 GaP(一种间接带隙半导体)的光致发光(PL)。将金属 Au 和 Ag 纳米颗粒溅射涂覆到 GaP 上,然后进行热处理。优化表面覆盖率后,我们发现 Au 和 Ag 涂层样品的 PL 分别提高了 5.6 倍和 14.5 倍。时间分辨光致发光光谱表明Ag纳米颗粒可以有效加速PL衰减时间。我们的结果表明,PL 增强来自增强的光子散射和金属金和银纳米颗粒的局部场增强。
We report here enhanced photoluminescence (PL) from GaP, an indirect band gap semiconductor, by metallic Au and Ag nanoparticles. The metallic Au and Ag nanoparticles were sputtering-coated onto GaP followed by heat treatment. After optimization of the surface coverage ratios, we find 5.6-fold and 14.5-fold PL enhancement for the Au and Ag coated samples, respectively. Time resolved photoluminescence spectroscopy indicates that Ag nanoparticles can effectively accelerate the PL decay time. Our results indicate that the PL enhancement comes from enhanced photon scattering and localized field enhancement of metallic Au and Ag nanoparticles.
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