摘要
高温固相烧结法制备了Er3+∶Yb3+∶Tm3+共掺硼硅酸盐玻璃.在978 nm半导体激光器抽运下,测量了样品在300～573 K下光致发光谱强度随温度的变化,讨论了室温时上转换绿光和红光等波段的光谱劈裂.分析了Er3+,Yb3+和Tm3+之间的能量传递机制.研究结果表明,当温度升高时,Er3+∶Yb3+∶Tm3+共掺硼硅酸盐玻璃的481 nm蓝光、517和534 nm绿光、以及657 nm红光等光致发光强度单调下降,在490 K时几乎消失.但900 nm左右的近红外光谱则随温度的升高而持续增强,而且其中心波长向短波方向移动.在室温时,光谱劈裂明显,高温时劈裂逐渐消失.
Er^3＋：Yb^3＋：Tm^3＋ co-doped borosilicate glasses were prepared by high-temperature scorching under solid phase. The temperature characteristics of the photoluminescence spectra were measured in the range of 300-573 K under pumping by a 978 nm semiconductor laser, and spectra splitting of green and red up-conversion emissions at room temperature were discussed. The mechanisms of the energy transfer among Er^3＋：Yb^3＋ and Tm^3＋ ions were analyzed. The results show that photoluminescenee intensities of the samples at 480, 517, 534 and 657 nm descend monotonously with the increasing temperature, almost disappear at 490 K. However, the photoluminescence intensity of the near infrared at about 900 nm stronger and stronger when sample temperature increases, and peak wavelength shift to the short-wavelength direction. The photoluminescence spectra take on marked splitting at room temperature, but the splitting become weaker at high temperature.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第6期1189-1193,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:10804015)
辽宁省科技厅项目(批准号:20062137)资助
