Synthesis and luminescence properties of CaSnO3:Bi3+ blue phosphor and the emission improvement by Li+ ion |
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| Authors: | Renping Cao Jinlong Zhang Wudi Wang Qianglin Hu Wensheng Li Wen Ruan Hui Ao |
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| Affiliation: | 1. College of Mathematics and Physics, Jinggangshan University, Ji'an, China;2. Personnel Office, Jinggangshan University, Ji'an, China |
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| Abstract: | CaSnO3:Bi3+ blue‐emitting phosphor was synthesized using a high‐temperature solid‐state reaction method in air. The crystal structures and luminescence properties were investigated. A broad emission band peaking at ~448 nm upon excitation at 262 and 308 nm was observed in the range 330–680 nm at room temperature due to 3P1 → 1S0 transition of the Bi3+ ion. The chromaticity coordinate was (0.1786, 0.1665). The optimal Bi3+ ion concentration was ~0.6 mol% in CaSnO3:Bi3+ phosphor. The emission spectrum of CaSnO3:Bi3+ phosphor showed a blue‐shift with increasing temperature from 50 to 300 K due to the influence of temperature on the electron transition of the Bi3+ ion. The emission intensity of CaSnO3:Bi3+ phosphor may be increased ~1.45 times by co‐doping Li+ ions as a charge compensator and fluxing agent. The luminescence mechanism is explained by a configurational coordinate diagram of Bi3+ ion in CaSnO3:Bi3+ phosphor. |
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| Keywords: | Bi3+ ion blue‐emitting charge compensation perovskite phosphors |
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