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Dual substitution of host lattice ions to enhance the luminescence properties of Zn2TiO4:Cr3+ phosphor |
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| Authors: | Kang Cheng Weichao Huang Xinyong Gong Chaoyong Deng |
| Affiliation: | 1. Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang, Guizhou, China Contribution: Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Writing - original draft, Writing - review & editing;2. Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang, Guizhou, China;3. Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang, Guizhou, China Contribution: Methodology, Supervision, Validation |
| Abstract: | Near-infrared light sources have potential applications in many fields. Cr3+ is a good luminescence centre to prepare near-infrared phosphors. Improving the performance of existing near-infrared luminescent materials has indeed attracted great interest from researchers. The luminescence properties of Zn2TiO4:Cr3+ were improved by crystal field engineering strategies. Zn2+–Ti4+ was partially replaced using a Li+–Nb5+ ion pair based on the Zn2TiO4:Cr3+ phosphors. Luminescence Cr3+-activated luminescent materials are sensitive to changes in the local crystal structure and crystal field environment. Doping of Li+–Nb5+ increased the luminescence intensity up to 2.7 times that of the undoped sample. Also, the thermal stability of the phosphor was greatly increased by the replacement of Li+–Nb5+. |
| Keywords: | Cr3+ ions crystal field engineering ion pairs near-infrared |