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A reduced-dimensional polar hybrid perovskite for self-powered broad-spectrum photodetection
Chemical Science ( IF 7.6 ) Pub Date : 2021-1-4 , DOI: 10.1039/d0sc06112c Dong Li 1, 2 , Wentao Wu 1, 2 , Shiguo Han 1, 2, 3 , Xitao Liu 1, 2, 3 , Yu Peng 1, 2 , Xiaoqi Li 1, 2 , Lina Li 1, 2, 3 , Maochun Hong 1, 2, 3 , Junhua Luo 1, 2, 3
Chemical Science ( IF 7.6 ) Pub Date : 2021-1-4 , DOI: 10.1039/d0sc06112c Dong Li 1, 2 , Wentao Wu 1, 2 , Shiguo Han 1, 2, 3 , Xitao Liu 1, 2, 3 , Yu Peng 1, 2 , Xiaoqi Li 1, 2 , Lina Li 1, 2, 3 , Maochun Hong 1, 2, 3 , Junhua Luo 1, 2, 3
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Polar hybrid perovskites have been explored for self-powered photodetection benefitting from prominent transport of photo-induced carriers and the bulk photovoltaic effect (BPVE). However, these self-powered photodetection ranges are relatively narrow depending on their intrinsic wide bandgaps (>2.08 eV), and the realization of broad-spectrum self-powered photodetection is still a difficult task. Herein, we successfully obtained a polar multilayered perovskite, (I-BA)2(MA)2Pb3I10 (IMP, MA+ = methylammonium and I-BA+ = 4-iodobutylammonium), via rational dimension reduction of CH3NH3PbI3. It features the narrowest bandgap of 1.71 eV in a BPV material. As a consequence, the integration of narrow bandgap and BPVE causes the self-powered photodetection to extend to 724 nm for IMP, and a repeatable photovoltaic current reaching 1.0 μA cm−2 is acquired with a high “on/off” ratio of ∼103 and photodetectivity (∼109 Jones) at zero bias. This innovative research provides a foothold for adjusting the physical properties of hybrid perovskites and will expand their potential for self-powered broad-spectrum detection.
中文翻译：
用于自供电广谱光电检测的降维极性杂化钙钛矿
得益于光生载流子的显着传输和体光伏效应（BPVE），极性杂化钙钛矿已被探索用于自供电光电检测。然而，由于其固有的宽带隙（>2.08 eV），这些自供电光电探测范围相对较窄，实现广谱自供电光电探测仍然是一项艰巨的任务。在此，我们通过CH 3 NH的合理降维，成功获得了极性多层钙钛矿，(I-BA) 2 (MA) 2 Pb 3 I 10 （ IMP ，MA + =甲基铵和I-BA + = 4-碘丁基铵） 3 PbI 3 。它具有 BPV 材料中最窄的带隙 1.71 eV。因此，窄带隙和BPVE的集成使得IMP的自供电光电探测扩展到724 nm，并且以~10的高“开/关”比获得了达到1.0 μA cm -2的可重复光伏电流。 3和零偏压下的光电探测能力 (∼10 9 Jones)。这项创新研究为调整杂化钙钛矿的物理特性提供了立足点，并将扩大其自供电广谱检测的潜力。
更新日期：2021-01-18
中文翻译：
用于自供电广谱光电检测的降维极性杂化钙钛矿
得益于光生载流子的显着传输和体光伏效应（BPVE），极性杂化钙钛矿已被探索用于自供电光电检测。然而，由于其固有的宽带隙（>2.08 eV），这些自供电光电探测范围相对较窄，实现广谱自供电光电探测仍然是一项艰巨的任务。在此，我们通过CH 3 NH的合理降维，成功获得了极性多层钙钛矿，(I-BA) 2 (MA) 2 Pb 3 I 10 （ IMP ，MA + =甲基铵和I-BA + = 4-碘丁基铵） 3 PbI 3 。它具有 BPV 材料中最窄的带隙 1.71 eV。因此，窄带隙和BPVE的集成使得IMP的自供电光电探测扩展到724 nm，并且以~10的高“开/关”比获得了达到1.0 μA cm -2的可重复光伏电流。 3和零偏压下的光电探测能力 (∼10 9 Jones)。这项创新研究为调整杂化钙钛矿的物理特性提供了立足点，并将扩大其自供电广谱检测的潜力。
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