【作者】 段忠超； 张军杰； 廖梅松； 于春雷； 胡丽丽；

【Author】 DUAN Zhong-chao, ZHANG Jun-jie, LIAO Mei-song, YU Chun-lei, HU Li-li ( Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; Graduate School of the Chinese Academy of Sciences, Beijing 100039, China)

【机构】 中国科学院上海光学精密机械研究所；

【摘要】 稀土掺杂氧氟玻璃是一种优良的上转换发光材料,制备了组分为35SiO2-15AlO1.5-(45-x)PbF22-xCdF2- 0．1TmF3-1．5YbF3(x=0,10,20,30)的氧氟硅酸盐玻璃,系统研究了CdF2含量对其热学性能和光学性能的影响。研究表明用CdF2部分替代pbF2可以提高玻璃的热稳定性、使紫外吸收截至边向短波方向移动;随着CdF2含量的增加,开始Tm3+蓝光和红光上转换发光增强缓慢,而后迅速增强,而近红外上转换发射先显著增强后增强放缓;由于蓝光和近红外发光强度远大于红光发光强度,所以该氧氟玻璃更适合于蓝光和近红外发光材料。最后,探讨了Tm3+的上转换发光机理。更多还原

【Abstract】 Tm3+-Yb3+ codoped oxyfluoride silicate glasses suitable for upconversion laser were fabricated and the effect of CdF2 addition on thermal stability and upconversion luminescence properties in it were systematically investigated. The experimental results indicate that, with the substitution CdF2 for PbF2, the glass thermal stability increases and the UV cutoff edge moves to short-wave band slightly. With increasing CdF2 content, the blue and red upconversion luminescence intensity increase slightly at first, and then increase rapidly. While the near infrared (NIR) upconversion emission intensity increases notably at first and then increases slightly. However the blue and NIR luminescence intensity are much stronger than that of red, indicating these oxyfluoride silicate glasses are more preferable for blue and NIR emissions than red emission. The possible upconversion mechanisms for the blue, red and NIR fluorescence are also estimated and evaluated.更多还原