摘要
实验制备了Ce3+掺杂重金属锗酸盐玻璃样品,测试了透射、发射、激发光谱。结果表明:由于锗酸盐玻璃的光碱度较大,Ce3+的发射波长发生了明显红移。La3+的加入对Ce3+具有分散作用,有助于提高Ce3+的掺入量且降低了浓度淬灭效应。对于Ce3+和Tb3+共掺杂玻璃,Ce3+和Tb3+的发光均有所减弱,这可能是由于Ce3+,Tb3+二者在351～381nm波长处有激发峰的重叠,而存在竞争吸收所致。
Cerous ion-doped heavy-metal germinate glasses were prepared and their transmission, emission and excitation spectra were measured. The results show that the emission peak wavelength of Ce^3＋ has an obvious red-shift due to the higher optical basicity of germanate glasses. It was also found that the addition of La^3＋ disperses Ce^3＋ in the glass matrix, enhances the doping content of Ce^3＋ in the glasses and reduces the effect of concentration quenching. As for Ce^3＋ and Tb^3. co-doped glasses, the luminescence intensifies of Ce^3＋ and Tb^3＋ both decrease. This could be related to the competitive absorption between Ce3＋ and Tb^3＋ because their excita- tion peaks pile up on the wavelength of 351-381 nm.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2006年第7期827-830,841,共5页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(50572027)
上海市科委国际合作(035207015)资助项目
关键词
锗酸盐玻璃
铈掺杂
能量传递
发光性能
闪烁体
germanate glass
cerium-doped
energy transfer
luminescent property
scintillator
