文献类型：期刊文献

英文题名：Efficient Near-Infrared Down-Conversion in Pr³⁺-Yb³⁺ Codoped Glasses and Glass Ceramics Containing LaF₃ Nanocrystals

作者：Xu, Yinsheng[1,2,3];Zhang, Xianghua[2];Dai, Shixun[4];Fan, Bo[2];Ma, Hongli[2];Adam, Jean-luc[2];Ren, Jing[1];Chen, Guorong[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]Univ Rennes 1, CNRS, UMR 6226, Lab Verres & Ceram, F-35042 Rennes, France;[3]Ningbo Univ, Fac Mat Sci & Chem Engn, Ningbo 315211, Peoples R China;[4]Ningbo Univ, Fac Informat Sci & Engn, Ningbo 315211, Peoples R China

年份：2011

卷号：115

期号：26

起止页码：13056

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY C

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000292281100046)】；

基金：This study is supported by Shanghai Leading Academic Discipline Project, Project B502, Shanghai Key Laboratory Project (08DZ2230500), and National Natural Science Foundation of China, No. NSFC 51072052. The first author wishes to express thanks to China Scholarship Council for providing the scholarship to study in France.

语种：英文

摘要：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.