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Exploiting the Bulk Photovoltaic Effect in a 2D Trilayered Hybrid Ferroelectric for Highly Sensitive Polarized Light Detection
Author(s) -
Peng Yu,
Liu Xitao,
Sun Zhihua,
Ji Chengmin,
Li Lina,
Wu Zhenyue,
Wang Sasa,
Yao Yunpeng,
Hong Maochun,
Luo Junhua
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201915094
Subject(s) - ferroelectricity , photodetector , materials science , polarization (electrochemistry) , perovskite (structure) , optoelectronics , anisotropy , photovoltaic system , optics , chemistry , dielectric , physics , crystallography , ecology , biology
Polarized light detection is attracting increasing attention for its wide applications ranging from optical switches to high‐resolution photodetectors. Two‐dimensional (2D) hybrid perovskite‐type ferroelectrics combining inherent light polarization dependence of bulk photovoltaic effect (BPVE) with excellent semiconducting performance present significant possibilities. Now, the BPVE‐driven highly sensitive polarized light detection in a 2D trilayered hybrid perovskite ferroelectric, (allyammonium) 2 (ethylammonium) 2 Pb 3 Br 10 ( 1 ), is presented. It shows a superior BPVE with near‐band gap photovoltage of ca. 2.5 V and high on/off switching ratio of current (ca. 10 4 ). Driven by the superior BPVE, 1 exhibits highly sensitive polarized light detection with a polarization ratio as high as ca. 15, which is far more beyond than those of structural anisotropy‐based monocomponent devices. This is the first realization of BPVE‐driven polarized light detection in hybrid perovskite ferroelectrics.