期刊
INORGANIC CHEMISTRY
卷 58, 期 16, 页码 10620-10624出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.9b01980
关键词
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资金
- National Natural Science Foundation of China [U1832136, 21303038]
- Fundamental Research Fund for the Central Universities [WK2340000082, JZ2016HGTA0690]
An organic ligand-free solution method is developed for preparing homogeneous core shell quantum-dot (QD)-modified pure Cs4PbBr6 microcrystals on a large scale (similar to 12 g) at room temperature. The ligand-free Cs4PbBr6 microcrystals show a high green photoluminescence quantum yield of 76% with 360 nm of excitation light, which is attributed to their unique microarchitecture, with several features including quantum confinement of the outer QDs, stability of the inner Cs4PbBr6 microcrystals, improved light trapping, and interfacial recombination. UV-vis-near-IR and photoluminescence analyses provide valued evidence to support the ligand-free Cs4PbBr6 with synergy between the QDs and microcrystals.
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