期刊
DALTON TRANSACTIONS
卷 51, 期 35, 页码 13499-13506出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2dt02386e
关键词
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资金
- National Natural Science Foundation of China [51902080]
- Natural Science Foundation of Hebei Province, China [E2019201223]
- Personnel Training Project of Hebei Province, China [A201902005]
- Central Government to Guide Local Scientific and Technological Development [206Z1102G, 216Z1101G]
A new near-infrared phosphor Ca2GeO4:xCr with a narrow emission range and good optical properties was developed. By oxidizing Cr3+ ions in the raw material, the dominant substitution of Cr4+ ions into the lattice sites was achieved, resulting in near-infrared light emission suitable for non-destructive testing applications.
In this work, a new NIR phosphor Ca2GeO4:xCr was developed, whose emission range (1000-1700 nm) is well within NIR-II, with a full width at half maximum (FWHM) of 215 nm. Interestingly, by sintering under an air atmosphere, the Cr3+ ions in the raw material are oxidized to Cr4+, and the near-infrared light emitted by the material is not the usual luminescence of Cr3+ ions located in NIR-I, which can be attributed to the dominant substitution of Cr4+ ions doped into the lattice sites. A pc-LED fabricated with this phosphor can detect different concentrations of ethanol, which demonstrates its good potential for non-destructive testing applications.
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