All-Inorganic Halide Perovskite Alloy Nanowire Network Photodetectors with High Performance
All-Inorganic Halide Perovskite Alloy Nanowire Network Photodetectors with High Performance
复制标题
高性能全无机卤化物钙钛矿合金纳米线网络光电探测器
DOI：
10.1021/acsami.9b21666
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发表时间：
2020-01-29
影响因子：
9.5
通讯作者：
Wang, Hao
中科院分区：
文献类型：
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作者：
Tang, Xiaoming;Zhou, Hai;Wang, Hao
有机-无机杂化卤化铅钙钛矿材料由于具有禁带宽度可调、制备工艺简单、光电转换效率高等优点，在光电领域引起了广泛的关注。然而，基于钙钛矿的器件的商业化仍然面临许多挑战，其中之一是包含有毒的铅。在此，我们展示了一种两步溶液法合成锡基钙钛矿纳米线（NW）及其在光电探测器（PD）中的应用。通过改变卤化物交换时间和前体中的Sn含量，CsPbxSn 1-x（BryI 1-y）（3）钙钛矿NW PD s的暗电流随着锡含量的增加而增加，并且随着Br浓度的增加而降低，并且对于用0.5mg mL（-1）SnI 2合成的钙钛矿合金NW PD s，在1V下实现了最低的暗电流值0.672nA。我们优化的钙钛矿合金NW PD表现出高性能，线性动态范围高达120 dB，上升/下降时间为4.25/4.82 ms，探测率为2 x 10（10）Jones。此外，我们的锡基钙钛矿NW器件在空气中储存30天后仍能保持良好的性能。这些结果证明了Sn基钙钛矿NW器件的良好的实际应用。
Organic-inorganic hybrid lead halide perovskites have attracted much attention in the photoelectric field due to their excellent characteristics, such as a tunable band gap, simple fabrication process, and high photoelectric conversion efficiency. However, the commercialization of the perovskite-based devices still faces many challenges, one of which is the inclusion of the toxic lead. Herein, we demonstrated a two-step solution method for synthesizing tin-based perovskite nanowires (NWs) with their application in photodetectors (PDs). By changing the halide exchange time and the Sn content in the precursor, the dark current of the CsPbxSn1-x(BryI1-y)(3), perovskite NW PDs increased with increasing content of tin and decreased with increasing Br concentration, and the lowest dark current with a value of 0.672 nA at 1 V was achieved for the perovskite alloy NW PDs synthesized with 0.5 mg mL(-1) SnI2. Our optimized perovskite alloy NW PDs showed high performance with a linear dynamic range of up to 120 dB, a rising/falling time of 4.25/4.82 ms, and a detectivity of 2 x 10(10) Jones. In addition, our Sn-based perovskite NW devices could maintain good performance after storing in air for 30 days. These results demonstrated good practical application for the Sn-based perovskite NW devices.