摘要
采用高温还原法合成了Sr2 MgSi2 O7∶Eu ,Dy长余辉发光材料 ,并对其性能和余辉机制进行了研究 .实验分析表明 :这种磷光体的主发射峰位于 469nm附近 ,是由于Eu2 + 的 4f5d -4 f跃迁导致的 ;共掺杂的Dy3+ 离子能形成合适深度的能级陷阱 ,从而明显提高余辉性能 .其初始亮度可达 2 2 0 0mcd/m2 ,余辉时间可达
Long afterglow photoluminescent materials Sr 2MgSi 2O 7∶Eu, Dy were prepared by sintering in reductive atmosphere at high temperature. The luminescent properties and phosphorescent mechanism of Sr 2MgSi 2O 7_based luminescent phosphor were studied. The analytical results indicated that the emission spectra of Sr 2MgSi 2O 7: Eu, Dy lied in near 469 nm, resulted from the transition of 4 f5d-4f of Eu 2+ ions. Co_doped Dy 3+ produced suitable depth energy traps, which improved afterglow property dramatically. Its initial luminescent intensity reached 2 200 mcd/m 2 and the duration time lasted over 5 h.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2002年第2期216-219,共4页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金资助项目 (5 9872 0 16)
关键词
长余辉
磷光体
光致发光材料
硅酸锶镁
高温还原法
销
镝
long afterglow
phosphor
emission
photoluminescent materials
strontium magnesium silicate
