物理学报Issue(23)：237803-1-237803-9,9.DOI:10.7498/aps.62.237803
锰离子对镥基纳米晶体的荧光调控与增强
Mn2+induced luminescence regulation and enhancement of Lu-based nanocrystals
摘要
Abstract
Transformation from Lu-based nanocrystals in hexagonal and cubic mixed phases to pure cubic phase was observed through adjusting the doping concentration of Mn2+. The mechanism for the phase transformation was discussed in detail. Studies on the time and frequency domain spectra indicated that the semi-pure red emissions in cubic Na5Lu9F32: 40%Mn2+, 20%Yb3+, 2%Ln3+(Ln=Er3+, Ho3+) nanocrystals were caused by a two-step energy transfer between Mn2+and Ln3+ions. After incorporating of Mn2+ions into the host lattices, the local symmetry around the luminescent ion was reduced, which induced the increase of radiative rates for transitions that were mainly contributed by electric dipole radiations. Considerable enhancements in upconversion and downconversion luminescence were accompanied. The result of the current study has great application potential in bioimaging and solar cells.关键词
镥基纳米晶体/电偶极跃迁/两步能量转移/局域对称性Key words
Lu-based nanocrystals/electric dipole transition/two-step energy transfer/local symmetry引用本文复制引用
何恩节,郑海荣,高伟,鹿盈,李俊娜,魏映,王灯,朱刚强..锰离子对镥基纳米晶体的荧光调控与增强[J].物理学报,2013,(23):237803-1-237803-9,9.基金项目
国家自然科学基金(批准号:11174190)和安徽省高等学校省级自然科学研究项目(批准号:KJ2011Z082)资助的课题.*Project supported by the National Natural Science Foundation of China (Grant No.11174190), and the Natural Science Foundation of University in Anhui Province, China (Grant No. KJ2011Z082) （批准号:11174190）
