1. The photoluminescence adjustment of red phosphors ANaWO2F4:Mn4+ (A = Li, Na, K) by suitable tolerance factor designing.
- Author
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Hu, Meiqing, Liu, Zhifu, Xia, Yujuan, Zhang, Ganghua, Fang, Yongzheng, Liu, Yufeng, Zhao, Guoying, and Hou, Jingshan
- Subjects
PHOSPHORS ,PHOTOLUMINESCENCE ,RED ,COPRECIPITATION (Chemistry) ,ALKALI metals - Abstract
Mn
4+ -activated perovskite-structured ANaWO2 F4 (A = Li, Na, K) red phosphors were successfully prepared by a facile co-precipitation method. By changing the A-site ions, the tolerance factor (t) of host material ANaWO2 F4 became adjustable. Red emissions in LiNaWO2 F4 :Mn4+ , Na2 WO2 F4 :Mn4+ and KNaWO2 F4 :Mn4+ were found to be gradually increased. The relationship between the structure and their photoluminescence properties was discussed. The results suggested that a t-dependent photoluminescence behavior may exist in perovskite-structured phosphors. As the tolerance factor increases, the emission intensity of ANaWO2 F4 (A = Li, Na, K) red phosphors increases. This work also provides a reference for the exploration and optimization of Mn4+ -activated perovskite-structured red phosphors. [ABSTRACT FROM AUTHOR]- Published
- 2020
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