Plasmonic‐Functionalized Broadband Perovskite Photodetector

作者：Bowen Du, Wenqiang Yang, Qiao Jiang, Hangyong Shan, Deying Luo, Bowen Li, Weichen Tang, Feng Lin, Bo Shen, Qihuang Gong, Xing Zhu, Rui Zhu, Zheyu Fang · 发表于：Advanced Optical Materials · 年份：2018 · DOI：10.1002/adom.201701271 · 被引用次数：107 · 研究领域：Perovskite Materials and Applications、Organic Electronics and Photovoltaics、Organic Light-Emitting Diodes Research

Abstract 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/SiO 2 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.