Efficient Near-Infrared Down-Conversion in Pr3+-Yb3+ Codoped Glasses and Glass Ceramics Containing LaF3 Nanocrystals
Efficient Near-Infrared Down-Conversion in Pr3+-Yb3+ Codoped Glasses and Glass Ceramics Containing LaF3 Nanocrystals
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DOI：
10.1021/jp201503v
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发表时间：
2011-07-07
影响因子：
3.7
通讯作者：
Chen, Guorong
中科院分区：
文献类型：
--
作者：
Xu, Yinsheng;Zhang, Xianghua;Chen, Guorong
采用常规熔淬法制备了Pr3+-Yb3+离子共掺杂40SiO(2)-30Al(2)O(3)-18Na(2)O- 12laf(3)玻璃。实现了量子产率为12%的近红外下转换发射。采用热处理法制备了含LaF3纳米晶的透明玻璃陶瓷。x射线衍射和扫描电镜结果表明，氟化物有利于小晶体的形成。通过与玻璃陶瓷的吸收光谱和发射光谱的比较，发现由于LaF3晶体的晶格相似，Pr3+离子优先加入到LaF3晶体中。因此，能量转移。在目前的玻璃中，不能通过结晶来提高效率。结果表明，在铝硅酸盐玻璃中具有正交结构的TbF3到LuF3的氟化物（包括YF3）适合在结晶过程中掺入YbF3。
The Pr3+-Yb3+ ion codoped 40SiO(2)-30Al(2)O(3)-18Na(2)O-12LaF(3) glasses were synthesized by a conventional melting-quenching method. Near-infrared downconversion emission with 12% quantum yield has been realized. Transparent glass ceramics containing LaF3 nanocrystals were prepared by heat treatment. X-ray diffraction and scanning electron microscopy results show that fluorides favor the formation of small crystals. Comparing the absorption and emission spectra of the glasses with that of the glass ceramics indicates that the Pr3+ ions are incorporated in priority into the LaF3 crystals, due to the similar crystal lattice. Thus, energy transfer. efficiency cannot be enhanced in the present glass by crystallization. It is suggested that fluorides from TbF3 to LuF3 (including YF3) having the orthorhombic structure in aluminosilicate glass are suitable for incorporating YbF3 during the crystallization process.