期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 121, 期 37, 页码 20387-20395出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.7b06929
关键词
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资金
- National key research and development program of China [2016YFB0401302]
- National Natural Science Foundation of China [61575019, 11474018]
- Fundamental Research Funds for the Central Universities [2016JBM066]
- Key Project of the Beijing Scientific Committee [D161100003416001]
CsPbX3 (X = Cl, Br, I) perovskite nanocrystals (NCs) are promising materials due to their excellent optoelectronic properties. In this work, we show a successful partial and reversible cation exchange reaction between Pb and Mn in both CsPbCl3 NCs and CsMnCl3 NCs systems to yield luminescent CsPb(1-x)MnxCl(3) NCs. By adjusting the reaction time, the photoluminescence from the exciton emission of CsPbCl3 and the electron transition of Mn2+ can be tuned gradually. This work highlights the feasibility of a postsynthetic interconversion of Pb2+ and Mn2+ in cesium lead chloride perovskite nanocrystals, which enables a new strategy to reduce the toxicity and adjust the emissions of CsPbCl3 NCs. In the end, we also discuss the plausible mechanisms for cation exchange in perovskite materials.
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