Journal
LASER & PHOTONICS REVIEWS
Volume 16, Issue 5, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/lpor.202100689
Keywords
ion doping; low-dimensional; photoluminescence; self-trapped excitons
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Funding
- National Natural Science Foundation of China [22103050, 21833009, 22088102]
- Natural Science Foundation of Shandong Province [ZR2021QB010]
- Liao Ning Revitalization Talents Program [XLYC1802126]
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This work reports a new all-inorganic zero-dimensional rare-earth perovskite material that exhibits tunable emission colors from blue-green to white to yellow at room temperature by controlling the excitation wavelength, and enhances the quantum yield of yellow emission by doping Sb3+ ions. The study not only presents a new type of light-emitting material, but also provides a strategy for the design of non-toxic and high-performance light-emitting materials.
Low-dimensional lead-free metal halides have recently attracted a great deal of attention for their unique photoluminescence properties. In this work, a new all-inorganic zero-dimensional (0D) rare-earth perovskite, namely Cs2ScCl5 center dot H2O is reported. The 0D crystal exhibits a rare phenomenon of excitation-wavelength dependent emission from blue-green to white to yellow at room temperature. Spectroscopic characterizations indicate the tunable emission is originated from two distinct self-trapped exciton states. In addition, the yellow emission quantum yield can be enhanced from 1.2% to approximate to 100% by doping Sb3+ ions into the crystal. The work not only presents a new all-inorganic semiconductor with tunable emission colors, but also provides a design strategy for developing nontoxic and high-performance light-emitting materials.
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