碘化胍脒铅：一种具有室温下红色发光的层状钙钛矿相关化合物。

Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Bioscience , ETH Zürich , Vladimir Prelog Weg 1 , CH-8093 Zürich , Switzerland.

Laboratory for Thin Films and Photovoltaics , Empa - Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129 , CH-8600 Dübendorf , Switzerland.

J Am Chem Soc. 2018 Mar 21;140(11):3850-3853. doi: 10.1021/jacs.8b00194. Epub 2018 Mar 12.

Two-dimensional hybrid organic-inorganic lead halides perovskite-type compounds have attracted immense scientific interest due to their remarkable optoelectronic properties and tailorable crystal structures. In this work, we present a new layered hybrid lead halide, namely [CH(NH)][C(NH)]PbI, wherein puckered lead-iodide layers are separated by two small and stable organic cations: formamidinium, CH(NH), and guanidinium, C(NH). This perovskite is thermally stable up to 255 °C, exhibits room-temperature photoluminescence in the red region with a quantum yield of 3.5%, and is photoconductive. This study highlights a vast structural diversity that exists in the compositional space typically used in perovskite photovoltaics.

二维混合有机-无机卤化铅钙钛矿型化合物由于其显著的光电性能和可调节的晶体结构，引起了科学界的极大兴趣。在这项工作中，我们提出了一种新的层状混合卤化铅，即[CH(NH)][C(NH)]PbI，其中，扭曲的铅-碘层由两个小而稳定的有机阳离子隔开：甲脒，CH(NH)，和胍，C(NH)。这种钙钛矿在 255°C 下热稳定，在室温下具有红色区域的光致发光，量子产率为 3.5%，并且具有光电导性。这项研究强调了在通常用于钙钛矿光伏的组成空间中存在着巨大的结构多样性。