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Wideband near-infrared emission from GaScO3:Cr3+ phosphors with a perovskite structure |
| Chong Li(李翀)1, Mengyu Zhang(张梦宇)1, Chuancheng Zhang(张传成)1, Wenzhi Su(宿文志)1, Yong Zou(邹勇)1, Shoujun Ding(丁守军)1,2,†, and Qingli Zhang(张庆礼)3 |
1 School of Microelectronics and Data Science, Anhui University of Technology, Maanshan 243002, China;
2 Anhui Provincial Joint Key Laboratory of Disciplines for Industrial Big Data Analysis and Intelligent Decision, Maanshan 243002, China;
2 Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China |
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Abstract Cr$^{3+}$-activated phosphors have attracted significant attention for their tunable emission, spanning narrow-band red to broadband near-infrared (NIR) luminescence, depending on the crystal field environment. Here, we report the realization of wideband NIR emission in Cr$^{3+}$-doped GaScO$_{3}$ (GaScO$_{3}$:Cr$^{3+}$) phosphors with perovskite structure. The phosphors were synthesized by traditional solid-state reaction method. The first-principles calculations were conducted and the results demonstrate that the octahedral [GaO$_6$] sites exhibit relatively weak crystal field strength ($Dq/B\approx 2.2$), facilitating efficient spin-allowed transitions of Cr$^{3+}$ from the $^{4}$T$_{2}$ state to the $^{4}$A$_{2}$ state. The photoluminescence spectroscopy revealed an exceptionally broad NIR emission band from a range of 700 nm-1200 nm with full width at half maximum (FWHM) of 145 nm under 465-nm excitation. Overall, these results highlight the viability of GaScO$_{3}$:Cr$^{3+}$ as a highly promising material for wideband NIR applications.
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Received: 21 March 2025
Revised: 28 April 2025
Accepted manuscript online: 07 May 2025
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PACS:
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75.20.En
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(Metals and alloys)
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61.72.-y
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(Defects and impurities in crystals; microstructure)
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76.30.Fc
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(Iron group (3d) ions and impurities (Ti-Cu))
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78.55.-m
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(Photoluminescence, properties and materials)
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71.15.Mb
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(Density functional theory, local density approximation, gradient and other corrections)
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| Fund: Project supported by the Natural Science Research Project of Anhui Provincial Education Department for Excellent Young Scholars (Grant No. 2024AH030007) and the National Natural Science Foundation of China (Grant No. 52202001). |
Corresponding Authors:
Shoujun Ding
E-mail: sjding@ahut.edu.cn
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Cite this article:
Chong Li(李翀), Mengyu Zhang(张梦宇), Chuancheng Zhang(张传成), Wenzhi Su(宿文志), Yong Zou(邹勇), Shoujun Ding(丁守军), and Qingli Zhang(张庆礼) Wideband near-infrared emission from GaScO3:Cr3+ phosphors with a perovskite structure 2025 Chin. Phys. B 34 087502
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