发光学报2013，Vol.34Issue(8)：970-975,6.DOI:10.3788/fgxb20133408.0970
Na3GdSi2O7∶Tb3+荧光粉发光特性及Gd3+→Tb3+之间的能量传递
Luminescent Properties of Phosphor Na3GdSi2O7 ∶ Tb3 + and Gd3 +→Tb3 + Energy Transfer
摘要
Abstract
Tb3+ doped sodium gadolinium pyrosilicate phosphors Na3Gd1-xTbxSi2O7 were prepared using a high-temperature solid-state reaction technique.The spectroscopic properties of Na3Gd1-xTbxSi2O7 in VUV-UV-Vis range and fluorescent lifetimes were investigated.The lowest 5d orbitals of Tb3 + in two sites both 6-fold distorted octahedron coordination (trigonal antiprism tap) (Gd3+ (1)) and 6-fold regular trigonal prism coordination (tp) (Gd3 + (2)) were discussed.The lowest 5d orbitals of Tb3 + in Gd3+ (1) is 235 nm for allowed transition,and 280 nm for forbidden transition.The lowest 5d orbitals of Tb3+ in Gd3+ (2) is 224 nm for allowed transition,and 256 nm for forbidden transition.The nonradiative energy-transfer rate K and energy-transfer efficiency ηwere also investigated.The results show that there is efficient Gd3+-Tb3+ energy-transfer in Na3Gd1-xTbxSi2O7,for K and ηincreasing with the increasing of Tb3+ concentration.关键词
Na3GdSi2O7/Tb3+/荧光粉/稀土/能量传递Key words
Na3GdSi2O7 / Tb3+ / phosphor/ rare earth/ energy transfer分类
数理科学引用本文复制引用
倪海勇,梁宏斌,王灵利,张秋红..Na3GdSi2O7∶Tb3+荧光粉发光特性及Gd3+→Tb3+之间的能量传递[J].发光学报,2013,34(8):970-975,6.基金项目
广州市珠江科技新星项目(2011J2200034) （2011J2200034）
广东省战略新兴产业项目(粤财工[2010]633号)资助项目 （粤财工[2010]633号）
