窄带近红外钙钛矿/聚合物混合光电探测器
Narrowband Near-Infrared Perovskite/Polymer Hybrid Photodetectors.
作者信息
Lan Zhaojue, Cai Linfeng, Luo Dan, Zhu Furong
机构信息
Department of Physics, Research Centre of Excellence for Organic Electronics, and Institute of Advanced Materials, Hong Kong Baptist University, Hong Kong, China.
Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
出版信息
ACS Appl Mater Interfaces. 2021 Jan 13;13(1):981-988. doi: 10.1021/acsami.0c16047. Epub 2020 Dec 21.
The distinct visible-blind narrowband near-infrared (NIR) photodetection behaviors in the perovskite/polymer hybrid photodetectors (PDs) have been investigated. The narrowband NIR response in the hybrid PDs is realized through the buildup of the space charges at the perovskite/polymer interface. The semiconducting perovskite layer acts as an internal NIR bandpass due to its high absorption to the visible light and high transparency to the NIR light. It also acts as an excellent hole-transporting layer, facilitating the efficient extraction of the holes generated in the low band gap NIR light-absorbing polymer blend layer. The hybrid PDs thus demonstrated have a -3 dB cutoff frequency of 300 kHz, providing an exciting option for a plethora of applications in bioimaging, environmental detection, and security monitoring.
人们已经对钙钛矿/聚合物混合光电探测器（PDs）中独特的可见光-近红外（NIR）窄带光探测行为进行了研究。混合PDs中的窄带近红外响应是通过钙钛矿/聚合物界面处空间电荷的积累来实现的。半导体钙钛矿层由于对可见光具有高吸收性且对近红外光具有高透明度，因此充当内部近红外带通。它还充当优异的空穴传输层，有助于高效提取在低带隙近红外光吸收聚合物共混层中产生的空穴。如此展示的混合PDs具有300 kHz的-3 dB截止频率，为生物成像、环境检测和安全监测等众多应用提供了令人兴奋的选择。
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