Cao Renping, Zhang Jinlong, Wang Wudi, Hu Qianglin, Li Wensheng, Ruan Wen, Ao Hui
College of Mathematics and Physics, Jinggangshan University, Ji'an, China.
Personnel Office, Jinggangshan University, Ji'an, China.
Luminescence. 2017 Sep;32(6):908-912. doi: 10.1002/bio.3268. Epub 2017 Jan 10.
CaSnO :Bi 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 P → S transition of the Bi ion. The chromaticity coordinate was (0.1786, 0.1665). The optimal Bi ion concentration was ~0.6 mol% in CaSnO :Bi phosphor. The emission spectrum of CaSnO :Bi 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 Bi ion. The emission intensity of CaSnO :Bi 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 Bi ion in CaSnO :Bi phosphor.
采用高温固相反应法在空气中合成了CaSnO:Bi蓝色发光荧光粉。对其晶体结构和发光性能进行了研究。室温下，在330 - 680 nm范围内，当在262和308 nm激发时，由于Bi离子的P→S跃迁，观察到一个在~448 nm处达到峰值的宽发射带。色度坐标为(0.1786, 0.1665)。在CaSnO:Bi荧光粉中，最佳Bi离子浓度约为0.6 mol%。由于温度对Bi离子电子跃迁的影响，CaSnO:Bi荧光粉的发射光谱在50至300 K温度范围内随温度升高出现蓝移。通过共掺杂Li离子作为电荷补偿剂和助熔剂，CaSnO:Bi荧光粉的发射强度可提高约1.45倍。通过CaSnO:Bi荧光粉中Bi离子的组态坐标图解释了发光机理。
