发光学报2011，Vol.32Issue(11)：1139-1142,4.
MgAl2O4:Mn2+绿色荧光粉的合成与光学性质
Fabrication and Optical Properties of MgAl2O4:Mn2+
焦学琛 1郝振东 2张霞 1张家骅1
作者信息
- 1. 中国科学院激发态物理重点实验室长春光学精密机械与物理研究所,吉林长春,130033
- 2. 中国科学院研究生院,北京,100039
- 折叠
摘要
Abstract
MgAl2O4: xMn2+ phosphors with various Mn2+ mole fraction x has been synthesized by high temperature solid-state reaction method. Upon blue excitation at 450 nm, the green emission band at 520 nm of Mn reaches the maximal intensity at x = 10%. Our study indicates that there is no considerable concentration quenching for x higher than 10% . The decrease of luminescence for x > 10% is due to more defects generated by Mn2+ introduction. The defects compete with Mn2+ for excitation absorption and also re-absorb luminescence of Mn2+. The temperature induced luminescence enhancement has been observed. The result is well explained in connect with the defects acting as traps basing on diffuse reflection spectra at different temperatures.关键词
concenlralion quenching/thermal quenching/MgAl2O4/blue excilalion/energy conversionKey words
concenlralion quenching/thermal quenching/MgAl2O4/blue excilalion/energy conversion引用本文复制引用
焦学琛,郝振东,张霞,张家骅..MgAl2O4:Mn2+绿色荧光粉的合成与光学性质[J].发光学报,2011,32(11):1139-1142,4.
