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- Title
A new blue long-lasting phosphorescence phosphor Mg<sub>2</sub>SnO<sub>4</sub>:Bi<sup>3+</sup>: synthesis and luminescence properties.
- Authors
Li, Jiayu; Pang, Ran; Sun, Wenzhi; Wu, Haiyan; Li, Huimin; Jiang, Lihong; Zhang, Su; Feng, Jing; Liu, Liyan; Li, Chengyu
- Abstract
In this article, we synthesized a new long-lasting phosphor Mg2SnO4:Bi3+ by traditional high-temperature solid-state reaction method. The structure and luminescence properties were characterized using X-ray powder diffraction, photoluminescence spectra, phosphorescence spectra, decay curves and thermoluminescence curves. The results show that the phosphor can exhibit blue emission corresponding to 3P1–1S0 transition of Bi3+ under UV light excitation. After ceasing the excitation, blue phosphorescence can be observed. For the optimal phosphor its blue phosphorescence could be observed by human naked eyes in the dark even after 3 h. The thermoluminescence analysis reveals that three kinds of trapping centers exist in the phosphor, of which the ones at 329 and 359 K are responsible for the long-lasting phosphorescence at room temperature. Bi3+ ions took the sites of Mg2+ and Sn4+ forming three different types of emitting centers, and yielding charged impurity defects which acted as charge trap centers and partly stored the excitation energy.
- Subjects
PHOSPHORUS compound synthesis; PHOTOLUMINESCENCE; X-ray powder diffraction; PHOSPHORESCENCE spectroscopy; THERMOLUMINESCENCE; ULTRAVIOLET radiation
- Publication
Journal of Materials Science: Materials in Electronics, 2018, Vol 29, Issue 5, p4163
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-017-8361-9