Sb~(3+)-Doping in Cesium Zinc Halides Single Crystals Enabling High-Efficiency Near-Infrared Emission

Su Binbin; Li Mingze; Song EnhaiXia Zhiguo

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Sb~(3+)-Doping in Cesium Zinc Halides Single Crystals Enabling High-Efficiency Near-Infrared Emission

机译：Sb~(3+)-Doping in Cesium Zinc Halides Single Crystals Enabling High-Efficiency Near-Infrared Emission

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Luminescent metal halide materials with flexible crystallography/electronic structures and tunable emission have demonstrated broad application prospects in the visible light region. However, designing near-infrared (NIR) light-emitting metal halides remains a challenge. Here, an enlightening prototype is proposed to explore the high-efficiency broadband NIR emission in metal halide systems by incorporating Sb3+ into the Cs2ZnCl4 matrix. Combined experimental analysis and density functional theory calculations reveal a modified self-trapped excitons model to elaborate the NIR emission. The high photoluminescence quantum yield of 69.9% peaking at 745 nm and large full width at half maximum of 175 nm, along with excellent air/thermal stability, show the unique advantages of lead-free metal halide Cs2ZnCl4:Sb3+ as the NIR light source. The substitution of Cl- by Br- further enables the red-shift of emission peak from 745 to 823 nm. The NIR light-emitting diode device based on Cs2ZnCl4:Sb3+ demonstrates potential as a non-visible light source in night vision. This study puts forward an effective strategy to design the novel eco-friendly and high-efficiency NIR emissive materials and provides guidance for expanding the application scope of luminescent metal halides.

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《Advanced functional materials》 |2021年第40期|2105316.1-2105316.10|共10页
作者
Su Binbin; Li Mingze; Song EnhaiXia Zhiguo;
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作者单位

South China Univ Technol, Sch Mat Sci & Engn, State Key Lab Luminescent Mat & Devices, Guangdong Prov Key Lab Fiber Laser Mat & Appl Tec, Guangzhou 510641, Peoples R China;

South China Univ Technol, Sch Mat Sci & Engn, State Key Lab Luminescent Mat & Devices, Guangdong Prov Key Lab Fiber Laser Mat & Appl Tec, Guangzhou 510641, Peoples R China|South China Univ Technol, Sch Phys & Optoelect, Guangzhou 510641, Peoples R China;

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正文语种英语
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metal halides; near-infrared emission; photoluminescence; Sb; (3+) doping;

Sb~(3+)-Doping in Cesium Zinc Halides Single Crystals Enabling High-Efficiency Near-Infrared Emission

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