title: Enhanced emissions of Eu(3+) by energy transfer from ZnO quantum dots embedded in SiO(2) glass.
abstract: SiO(2):Eu(3+) based bulk composites containing ZnO quantum dots were synthesized by an in situ sol-gel process. The quantum dots homogeneously distributed among the SiO(2) glass matrix exhibited a broad ultraviolet emission band centered at 385 nm. The ZnO ultraviolet luminescence intensity decreased monotonically with increasing Eu(3+) doping concentration, while the Eu(3+) visible emission was intensified significantly by the precipitation of ZnO quantum dots, ascribed to the energy transfer from ZnO to Eu(3+). The Eu(3+) luminescence at 612 nm for the sample with 20 mol% ZnO was about ten times stronger than that for the sample without ZnO. The influence of ZnO or Eu(3+) concentration on the energy transfer process is discussed.
authors.affiliation: The State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China. Graduate School of Chinese Academy of Sciences, Beijing 10049, People's Republic of China.
authors.forename: Yunlong
authors.initials: Y
authors.lastname: Yu
authors.forename: Yuansheng
authors.initials: Y
authors.lastname: Wang
authors.forename: Daqin
authors.initials: D
authors.lastname: Chen
authors.forename: Ping
authors.initials: P
authors.lastname: Huang
authors.forename: En
authors.initials: E
authors.lastname: Ma
authors.forename: Feng
authors.initials: F
authors.lastname: Bao