Journal
MATERIALS RESEARCH BULLETIN
Volume 129, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2020.110907
Keywords
Lead halide perovskite; Luminescence; Doping; X-ray absorption spectroscopy; X-ray excited optical luminescence
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Funding
- National Natural Science Foundation of China (NSFC) [U1432106]
- Natural Science Research Program of Higher Education of Jiangsu Province [18KJB150026]
- Soochow University-Western University Center for Synchrotron Radiation Research
- Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Soochow University
- DOE Office of Science by Argonne National Laboratory [DE-AC02-06CH11357]
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CsPbCl3 perovskite nanocrystals are doped with heterovalent Pr3+ using hot-injection method. These Pr3+- doped CsPbCl(3 )nanocrystals exhibit a dramatically improved absolute photoluminescence quantum yield (PLQY) compared to the undoped CsPbCl3, reaching 78.9 % PLQY at 9 % Pr-substitution. The crystal structure modification upon Pr3+ doping and luminescence mechanism are investigated using conventional optical spectroscopy and synchrotron X-ray spectroscopy (i.e., X-ray absorption fine structure and X-ray excited optical luminescence). Both the Pr3+ and Cl- are found contributing to the luminescence enhancement, and their individual roles in luminescence enhancement are analyzed.
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