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Gradient 2D/3D Perovskite Films Prepared by Hot-Casting for Sensitive Photodetectors.
Advanced Science ( IF 14.3 ) Pub Date : 2020-05-29 , DOI: 10.1002/advs.202000776 Hok-Leung Loi 1 , Jiupeng Cao 1 , Xuyun Guo 1 , Chun-Ki Liu 1 , Naixiang Wang 1 , Jiajun Song 1 , Guanqi Tang 1 , Ye Zhu 1 , Feng Yan 1
Advanced Science ( IF 14.3 ) Pub Date : 2020-05-29 , DOI: 10.1002/advs.202000776 Hok-Leung Loi 1 , Jiupeng Cao 1 , Xuyun Guo 1 , Chun-Ki Liu 1 , Naixiang Wang 1 , Jiajun Song 1 , Guanqi Tang 1 , Ye Zhu 1 , Feng Yan 1
Affiliation
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2D Ruddlesden–Popper perovskites have attracted wide attention recently because of tunable optoelectronic properties and have been used as alternatives to their 3D counterparts in various optoelectronic devices. Here, a series of (PEA)2(MA)n −1Pbn I3n +1 perovskite thin films is designed and fabricated by a convenient hot‐casting method to obtain gradient n in the films, which leads to the formation of vertical heterojunctions that can enhance charge separation in the films under light illumination. Based on a single gradient perovskite film, a highly sensitive and stable photodetector with a responsivity up to 149 AW−1 and a specific detectivity of 2 × 1012 Jones is obtained. This work paves a way to realizing high‐performance optoelectronic devices with enhanced charge separation by introducing compositional gradient in a perovskite film.
中文翻译：
用于灵敏光电探测器的热铸造制备梯度 2D/3D 钙钛矿薄膜。
2D Ruddlesden-Popper 钙钛矿最近因其可调谐的光电特性而引起了广泛关注，并已在各种光电设备中用作 3D 钙钛矿的替代品。这里，通过方便的热铸造方法设计和制造了一系列(PEA) 2 (MA) n -1 Pb n I 3 n +1钙钛矿薄膜，以获得薄膜中的梯度n，从而形成垂直异质结可以增强光照下薄膜中的电荷分离。基于单梯度钙钛矿薄膜，获得了一种高灵敏度、稳定的光电探测器，其响应度高达149 AW -1，比探测率为2 × 10 12 Jones。这项工作为通过在钙钛矿薄膜中引入成分梯度来实现具有增强电荷分离的高性能光电器件铺平了道路。
更新日期：2020-07-22
中文翻译：
用于灵敏光电探测器的热铸造制备梯度 2D/3D 钙钛矿薄膜。
2D Ruddlesden-Popper 钙钛矿最近因其可调谐的光电特性而引起了广泛关注，并已在各种光电设备中用作 3D 钙钛矿的替代品。这里，通过方便的热铸造方法设计和制造了一系列(PEA) 2 (MA) n -1 Pb n I 3 n +1钙钛矿薄膜，以获得薄膜中的梯度n，从而形成垂直异质结可以增强光照下薄膜中的电荷分离。基于单梯度钙钛矿薄膜，获得了一种高灵敏度、稳定的光电探测器，其响应度高达149 AW -1，比探测率为2 × 10 12 Jones。这项工作为通过在钙钛矿薄膜中引入成分梯度来实现具有增强电荷分离的高性能光电器件铺平了道路。
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