首页|Bi3+-activated dual-wavelength emitting phosphors toward effective optical thermometry

Bi3+-activated dual-wavelength emitting phosphors toward effective optical thermometry

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Optical thermometry as an important local temperature-sensing technique,has received increasing atten-tion in scientific and industrial areas.However,it is still a big challenge to develop luminescent materi-als with self-activated dual-wavelength emissions toward high-sensitivity optical thermometers.Herein,a novel ratiometric thermometric strategy of Bi3+-activated dual-wavelength emission band was real-ized in the same lattice position with two local electronic states of La3Sb1-xTaxO7:Bi3+(0≤x≤ 1.0)ma-terials based on the different temperature-dependent emission behaviors,benefiting from the highly-sensitive and regulable emission to the coordination environment of Bi3+.The structural and spectral results demonstrate that the emission tremendously shifted from green to blue with 68 nm and the in-tensity was enhanced 2.6 times.Especially,the visual dual-wavelength emitting from two emission cen-ters was presented by increasing the Ta5+substitution concentration to 20％or 25％,mainly originating from the two local electronic states around the Bi3+emission center.Significantly,the dual-wavelength with different thermal-quenching performance provided high-temperature sensitivity and good discrim-ination signals for optical thermometry in the range between 303 and 493 K.The maximum rela-tive sensitivity reached 2.64％/K(La3Sb0.8Ta0.2O7:0.04Bi3+@383 K)and 1.91％/K(La3Sb0.75Ta0.25O7:0.04Bi3+@388 K).This work reveals a rational design strategy of different local electronic states around the single-doping multiple emission centers towards practical applications,such as luminescence thermometry and white LED lighting.

Dual-wavelength emittingCationic substitutionTwo local electronic statesOptical thermometryBi3+-doped phosphor

Yu Xue、Yuqi Chen、Guixian Li、Weixi Xia、Qinan Mao、Lang Pei、Meijiao Liu、Liang Chu、Jiasong Zhong

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Center of Advanced Optoelectronic Materials,College of Materials and Environmental Engineering,Hangzhou Dianzi University,Hangzhou 310018,China

Department of Chemistry,Zhejiang Sci-Tech University,Hangzhou 310018,China

College of Electronics and Information,Hangzhou Dianzi University,Hangzhou 310018,China

国家自然科学基金国家自然科学基金国家自然科学基金Fundamental Research Funds for the Provincial Universities of ZhejiangPostgraduate Research Innovation Fund of Hangzhou Dianzi University

520721015197208852172205GK229909299001-003CXJJ2022032

2024

10.1016/j.cclet.2023.108447

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(3)
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