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Near-infrared luminescence investigation of Cr4+ ions doped Li2TiGeO5

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Abstract

In this paper, the preparation of a series of Li2TiGe1−xCrxO5 phosphors by high-temperature solid-state reaction is reported. The results of X-ray diffraction show that the doping of Cr4+ ions makes the lattice expand to a larger size. X-ray photoelectron spectroscopy analysis shows that the chromium ions in the sample are tetravalent, confirmed further by fluorescence spectroscopy. Under the excitation of 980 nm laser, the Cr4+ ions 3T2 → 3A2 radiates transition and emits light at 1300 nm. At the same time, the luminescence lifetime decreases with the increase in Cr4+ ions doping concentration. Li2TiGe1−xCrxO5 phosphors have a broad application prospect in near-infrared LEDs.

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Acknowledgements

This work was supported by Government Funded Projects (Grant No. 61409220309), International Science and Technology Cooperation Project of Jilin Province Science and Technology Department (Grant No. 20200801038GH), and Jilin Provincial Department Education (Grant Nos. JJKH20200771KJ, JJKH20200758KJ, JJKH20200761KJ).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, China

    Dongmei Wang, Xiliang Jiang, Zhuang Leng, Xinyu Wang, Weiling Yang, Tianqing Zhang, Xueming Shi, Xu Zhang, Fanming Zeng, Chun Li, Zhongmin Su, Hai Lin, Lina Liu & Yanyan Zhou

  2. Changchun Polytechnic, Changchun, 130033, Jilin, China

    Dongmei Wang

  3. Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, Changchun, 130022, China

    Fanming Zeng, Chun Li, Zhongmin Su, Hai Lin, Lina Liu & Yanyan Zhou

  4. Jilin Jianzhu University, Changchun, 130118, Jilin, China

    Xuejian Zhang, Huisheng Liu & Yongtao Li

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  1. Dongmei Wang
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Correspondence to Fanming Zeng, Chun Li or Zhongmin Su.

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Wang, D., Jiang, X., Leng, Z. et al. Near-infrared luminescence investigation of Cr4+ ions doped Li2TiGeO5. J Mater Sci: Mater Electron 32, 18544–18550 (2021). https://doi.org/10.1007/s10854-021-06118-8

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