期刊
CHEMISTRY OF MATERIALS
卷 32, 期 12, 页码 5327-5334出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.0c01708
关键词
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资金
- National Natural Science Foundation of China [51961145101, 51972118, 51722202]
- Fundamental Research Funds for the Central Universities [FRFTP-18-002C1]
- Guangzhou Science & Technology Project [202007020005]
- Guangdong Provincial Science &Technology Project [2018A050506004]
- Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01X137]
- RFBR [1952-80003]
Rational doping and compositional control remain significant challenges in designing luminescent metal halides to achieve highly efficient and tunable emission. Here, the air-stable lead-free Cs2InCl5 center dot H2O crystal with a zero-dimensional structure was investigated as a pristine compound to design new luminescence materials. Sb3+-doping inCs(2)InCl(5)center dot H2O:Sb3+ enabled broadband yellow emission with a photoluminescence quantum yield up to 95.5%. The emission colors can be expanded into the orange-red region by halogen compositional substitution for Cs2InCl5 center dot H2O:Sb3+ (X = Cl/Br/I). The optical characterizations along with the theoretical calculations demonstrate that the characteristic singlet and triplet self-trapped exciton emissions of ns(2)-metal-halide centers account for the tunable luminescence. Moreover, the admirable stability against air and heat pave way for its further applications in white light-emitting diodes and high-resolution fluorescent signs in anticounterfeiting technology. Our achievement in the case of Sb3+-doped Cs2InCl5 center dot H2O represents a successful strategy for developing stable lead-free metal halides with highly efficient emission for versatile optical applications.
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