期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 31, 页码 12709-12713出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202003234
关键词
doping; enhanced photoluminescence; lead-free perovskites; stability; zero-dimensional perovskites
资金
- National Key Research and Development Program of China [2017YFA0204800]
- National Natural Science Foundation of China [21833009, 21533010, 21525315]
- Scientific Instrument Developing Project of the Chinese Academy of Sciences [YJKYYQ20190003]
- Liao Ning Revitalization Talents Program [XLYC1802126]
- Dalian City Foundation for Science and Technology Innovation [2019J12GX031]
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(2)InCl(5)(H2O) (A=Rb, Cs) are presented that exhibit greatly enhanced yellow emission. To study the effect of coordination H2O, Sb-doped A(3)InCl(6) (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 Sb3+. We further explore the effect of Sb3+ 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.
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