Wang Yajie, Yu Yue, Zou Ya, Zhang Liyan, Hu Lili, Chen Danping
Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences Shanghai 201800 China
University of Chinese Academy of Sciences Beijing 100049 China.
RSC Adv. 2018 Jan 29;8(9):4921-4927. doi: 10.1039/c7ra13366a. eCollection 2018 Jan 24.
The structure of tin fluorophosphate glasses and their low melting point properties have attracted a great deal of attention recently, but their own luminescent features have not been well studied. Photoluminescence properties of ultra-low glass transition temperature (<200 °C) tin fluorophosphate glasses with varying SnO/SnF molar ratios at room temperature have been investigated in the present study. Broad photoluminescence in the range from 400 nm to 700 nm, originating from the S-S and T-S transitions of Sn with the ultra-high concentration (70 mol%), was obtained. And the SnF-SnO-PO glasses exhibited a fast decay lifetime of 2 ns. Both wavelengths of the excitation peak and emission peak depend on the local structure of Sn, which is influenced by different SnO/SnF molar ratios. White light can be generated by appropriately altering the SnO/SnF molar ratios in the SnF-SnO-PO glasses. The ultra-low glass transition temperature SnF-SnO-PO glasses without rare earth elements are a possible candidate for future high white light emission.
锡氟磷酸盐玻璃的结构及其低熔点特性最近引起了广泛关注，但其自身的发光特性尚未得到充分研究。本研究对具有不同SnO/SnF摩尔比的超低玻璃化转变温度（<200°C）锡氟磷酸盐玻璃在室温下的光致发光特性进行了研究。获得了源于超高浓度（70 mol%）Sn的S-S和T-S跃迁的400 nm至700 nm范围内的宽带光致发光。并且SnF-SnO-PO玻璃表现出2 ns的快速衰减寿命。激发峰和发射峰的波长均取决于Sn的局部结构，而Sn的局部结构受不同SnO/SnF摩尔比的影响。通过适当改变SnF-SnO-PO玻璃中的SnO/SnF摩尔比可以产生白光。不含稀土元素的超低玻璃化转变温度SnF-SnO-PO玻璃是未来高白光发射的一个可能候选材料。
