发光学报, 2015, 36 (12): 1416, 网络出版: 2016-02-02
Ba2SiO4∶Ce3+,Mn2+荧光粉的制备与光谱性质
Preparation and Photoluminescence Properties of Ba2SiO4∶Ce3+,Mn2+ Phosphor
摘要
用高温固相反应法合成了Ba2SiO4∶xCe3+,yMn2+(x=0~0.2, y=0~0.15)荧光粉,研究了荧光粉的晶体结构和发光性质。在紫外光激发下,Ba2SiO4∶xCe3+的发射光谱为位于384 nm附近的宽带。Ba2SiO4∶Mn2+样品的发射光谱位于376 nm的宽带较强,红光发射极弱。在Ce3+和Mn2+共掺的Ba2SiO4∶xCe3+,yMn2+样品中,位于606 nm附近的红光发射较强,来源于Mn2+的4T1(4G)-6A1(6S)跃迁。这说明Ce3+离子将部分能量传递给了Mn2+离子,有效地敏化了Mn2+离子的发光。当Ce3+的摩尔分数为0.2、Mn2+的摩尔分数为0.075时,Ba2SiO4∶xCe3+,yMn2+荧光粉位于606 nm的Mn2+的发射峰最强。
Abstract
The phosphors Ba2SiO4∶xCe3+,yMn2+(x=0-0.2, y=0-0.15) were synthesized through the solid-state reaction technique. The structure, photoluminescence properties of these phosphors were described. Under the excitation of UV light, the emission spectra of Ba2SiO4∶xCe3+ show broad band around 384 nm. The emission spectra of Ba2SiO4∶ Mn2+ show broad band around 376 nm, and the red emission is very weak. The red emission band located at around 606 nm is strongly enhanced in Ba2SiO4∶xCe3+,yMn2+, which is arised from 4T1(4G)-6A1(6S) transition of Mn2+. The results show that a part of the energy of Ce3+ ion is transferred to Mn2+ ion and sensitizes the luminescence of Mn2+ ion effectively. When the mole fractions of Ce3+ and Mn2+ are 0.2 and 0.075, the red emission around 606 nm is the strongest.
孙晓园, 张丽宏, 于立军, 骆永石, 吴春雷, 贺小光, 张家骅. Ba2SiO4∶Ce3+,Mn2+荧光粉的制备与光谱性质[J]. 发光学报, 2015, 36(12): 1416. SUN Xiao-yuan, ZHANG Li-hong, YU Li-jun, LUO Yong-shi, WU Chun-lei, HE Xiao-guang, ZHANG Jia-hua. Preparation and Photoluminescence Properties of Ba2SiO4∶Ce3+,Mn2+ Phosphor[J]. Chinese Journal of Luminescence, 2015, 36(12): 1416.