Direct Resonant Coupling of Al Surface Plasmon for Ultraviolet Photoluminescence Enhancement of ZnO Microrods
Direct Resonant Coupling of Al Surface Plasmon for Ultraviolet Photoluminescence Enhancement of ZnO Microrods
复制标题
铝表面等离子体直接共振耦合增强 ZnO 微棒的紫外光致发光
DOI：
10.1021/am505492r
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发表时间：
2014-10-22
影响因子：
9.5
通讯作者：
Wang, Shufeng
中科院分区：
文献类型：
--
作者：
Lu, Junfeng;Li, Jitao;Wang, Shufeng
采用气相输运工艺合成的六方ZnO微棒，经纳米Al修饰后，其紫外发射增强达到170倍以上。基于不同时间铝纳米粒子溅射ZnO微棒的稳定和瞬态光致发光（PL）光谱，推导了ZnO微棒的发光机理，并将其归因于金属表面等离子体共振（SPR）与ZnO的耦合。有趣的是，随着溅射时间的增加，带隙发射与缺陷相关发射的比值从0.1增加到42.7。研究结果表明，用Al纳米粒子修饰ZnO微棒有助于开发稳定、高效的激子光电器件，如发光二极管和激光器。
More than 170-fold ultraviolet emission enhancement was obtained from the hexagonal ZnO microrods synthesized by a simple vapor-phase transport process and decorated by Al nanoparticles (NPs). Based on the stable and transient photoluminescence (PL) spectra of the ZnO microrods sputtered with Al NPs for different times, the underlying mechanism was deduced and can be attributed to the metal surface plasmon resonance (SPR) coupling with ZnO. Interestingly, with increasing of the sputtering time, the ratio of the band gap emission to the defect-related emission was increased from 0.1 to 42.7. Our results demonstrated that ZnO microrods decorated with Al NPs shed light on developing stable and high-efficiency excitonic optoelectronic devices such as light-emitting diodes and lasers.