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Plasmonic‐Functionalized Broadband Perovskite Photodetector
Advanced Optical Materials ( IF 9 ) Pub Date : 2018-02-14 , DOI: 10.1002/adom.201701271
Bowen Du 1 , Wenqiang Yang 1 , Qiao Jiang 1 , Hangyong Shan 1 , Deying Luo 1 , Bowen Li 1 , Weichen Tang 1 , Feng Lin 1 , Bo Shen 1 , Qihuang Gong 1, 2 , Xing Zhu 1 , Rui Zhu 1, 2 , Zheyu Fang 1
Affiliation  

Organic–inorganic hybrid perovskite photodetectors have been reported to possess superior optoelectronic properties, such as high sensitivity, ultrafast response, and capability of strongly absorbing the light in the visible range. While in the near‐infrared range, the performances of these photodetectors deteriorate seriously, originating from the weak coupling of infrared light to the perovskites. In this study, an organic–inorganic hybrid perovskite photodetector on arrays of Au nanostructures is fabricated, which exhibits a remarkable photocurrent enhancement in the visible and near‐infrared range, ascribed to the huge localized electric field induced by the surface plasmon resonance of Au nanostructures. The maximum external quantum efficiency of this photodetector is as high as about 65%, 2.5 times that on a usual Si/SiO2 substrate without Au nanostructures. Obviously, by exploiting Au nanostructures, the light harvesting ability of the photodetector breaks through the perovskite absorption edge, and extends to the near‐infrared range.

中文翻译:

等离子功能宽带钙钛矿光电探测器

据报道,有机-无机混合钙钛矿光电探测器具有优异的光电性能,例如高灵敏度,超快响应以及在可见光范围内强烈吸收光的能力。在近红外范围内,这些光电探测器的性能严重下降,这是由于红外光与钙钛矿之间的弱耦合所致。在这项研究中,制造了一种在Au纳米结构阵列上的有机-无机杂化钙钛矿光电探测器,该探测器在可见光和近红外范围内表现出显着的光电流增强,这归因于Au纳米结构的表面等离子体激元共振引起的巨大局部电场。 。该光电探测器的最大外部量子效率高达约65%,是普通Si / SiO的2.5倍2没有金纳米结构的衬底。显然,通过利用金纳米结构,光电探测器的光收集能力突破了钙钛矿的吸收边缘,并扩展到了近红外范围。
更新日期:2018-02-14
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