Bulk Photovoltaic Effect in a Pair of Chiral-Polar Layered Perovskite-Type Lead Iodides Altered by Chirality of Organic Cations
Bulk Photovoltaic Effect in a Pair of Chiral-Polar Layered Perovskite-Type Lead Iodides Altered by Chirality of Organic Cations
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DOI：
10.1021/jacs.9b06815
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发表时间：
2019-09-18
影响因子：
15
通讯作者：
Miyasaka, Hitoshi
中科院分区：
文献类型：
--
作者：
Huang, Po Jung;Taniguchi, Kouji;Miyasaka, Hitoshi
体光伏效应（BPVE）是一种很有前途的光电现象，可以在没有偏压的情况下产生稳态光电流。然而，如何设计简单合理的材料来展示BPVE仍然是相关领域的一个重要课题。在这里，我们报告的观察BPVE在一个简单的手性极性对层状钙钛矿型碘化铅的晶体空间群P1（#1），这是通过组装R-和S-手性有机阳离子，分别合成。零偏压光电流的符号被组装的阳离子的R/S-手性改变，所述组装的阳离子定义了源自晶体中对准的每个手性有机阳离子的电偶极矩的电极化方向。在寻找BPVE材料时，期望在晶体中的手性控制策略是有用的。
The bulk photovoltaic effect (BPVE) is a promising optoelectronic phenomenon for generating a steady-state photocurrent without a bias voltage. Nevertheless, the simple and rational design of materials exhibiting the BPVE remains an important topic in the relevant fields. Here, we report the observation of the BPVE in a simple chiral-polar pair of layered perovskitetype lead iodides in the crystal space group of P1 (#1), which were synthesized by assembling R- and S-chiral organic cations, respectively. The sign of the zero-bias photocurrent is altered by the R/S-chirality of the assembled cations, which define the direction of electric polarization derived from the electric dipole moment of each chiral organic cation aligned in a crystal. The strategy of chirality control in a crystal is expected to be useful when searching for BPVE materials.