Luminescence properties and optical thermometry behavior of Te4+-doped cesium zinc chloride crystals.
| Title: | Luminescence properties and optical thermometry behavior of Te4+-doped cesium zinc chloride crystals. |
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| Authors: | Yu, Hailong1 (AUTHOR), Liu, Jia1 (AUTHOR), Zhang, Jing1 (AUTHOR), Zhao, Shuang1 (AUTHOR), Li, Xiunan1 (AUTHOR), Wu, Wenzhi1 (AUTHOR) wuwenzhi@hlju.edu.cn |
| Source: | Ceramics International. Nov2024:Part A, Vol. 50 Issue 22, p45969-45975. 7p. |
| Subject Terms: | *ZINC crystals, *ZINC chloride, *METAL halides, *DENSITY functional theory, *OPTICAL properties |
| Abstract: | Herein, we successfully prepared Te4+-doped zero-dimensional (0D) cesium zinc chloride (Cs 2 ZnCl 4) crystals using solvothermal method. The structural and luminescence properties of Cs 2 ZnCl 4 : Te4+ crystals have been investigation in detail by means of spectral experiments and density functional theory calculations. The Cs 2 ZnCl 4 : Te4+ crystal exhibits broadband yellow emission at 580 nm with a photoluminescence quantum yield (PLQY) of 33.7% and a large full width at half maximum about 117 nm, of which emission is attributed to self-trapped excitons resulting from lattice vibration of the distorted structure. At low temperature, the PL intensity of Cs 2 ZnCl 4 : Te4+ crystals increase unusually, which is mainly related to the triplet state emission mechanism. In addition, PL lifetime is strongly temperature-dependent, and we calculated the maximum relative sensitivity is 0.93 %K−1 at 105–120 K and the maximum absolute sensitivity is 29 ns K−1 at 130 K. These findings not only provide important clues to the optical properties of 0D metal halides, but also highlight its significant potential in non-contact optical thermometry technology. [Display omitted] • Te4+ doped Cs 2 ZnCl 4 crystals are successfully synthesized by solvothermal method. • At low temperatures, Cs 2 ZnCl 4 : Te4+ crystals exhibit unusual luminescent behavior. • The maximum values of relative and absolute sensitivity are obtained as 0.93 % K−1 and 29 ns K−1, respectively. [ABSTRACT FROM AUTHOR] |
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| Database: | Academic Search Complete |
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