Han Peigeng, Luo Cheng, Yang Songqiu, Yang Yang, Deng Weiqiao, Han Keli
State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian, 116023, P. R. China.
University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Angew Chem Int Ed Engl. 2020 Jul 27;59(31):12709-12713. doi: 10.1002/anie.202003234. Epub 2020 May 28.
Zero-dimensional (0D) lead-free perovskites have unique structures and optoelectronic properties. Undoped and Sb-doped all inorganic, lead-free, 0D perovskite single crystals A InCl (H O) (A=Rb, Cs) are presented that exhibit greatly enhanced yellow emission. To study the effect of coordination H O, Sb-doped A InCl (A=Rb, Cs) are also synthesized and further studied. The photoluminescence (PL) color changes from yellow to green emission. Interestingly, the photoluminescence quantum yield (PLQY) realizes a great boost from <2 % to 85-95 % through doping Sb . We further explore the effect of Sb dopants and the origin of bright emission by ultrafast transient absorption techniques. Furthermore, Sb-doped 0D rubidium indium chloride perovskites show excellent stability. These findings not only provide a way to design a set of new high-performance 0D lead-free perovskites, but also reveal the relationship between structure and PL properties.
零维（0D）无铅钙钛矿具有独特的结构和光电特性。本文展示了未掺杂和锑掺杂的全无机、无铅、0D钙钛矿单晶AInCl（H₂O）（A = Rb、Cs），它们表现出显著增强的黄色发射。为了研究配位H₂O的影响，还合成并进一步研究了锑掺杂的AInCl（A = Rb、Cs）。光致发光（PL）颜色从黄色变为绿色发射。有趣的是，通过掺杂锑，光致发光量子产率（PLQY）从<2%大幅提高到85 - 95%。我们通过超快瞬态吸收技术进一步探究了锑掺杂剂的影响以及明亮发射的起源。此外，锑掺杂的0D氯化铷铟钙钛矿表现出优异的稳定性。这些发现不仅提供了一种设计新型高性能0D无铅钙钛矿的方法，还揭示了结构与PL性质之间的关系。
