title: Bi3+ sensitized Y2WO6:Ln3+ (Ln=Dy, Eu, and Sm) phosphors for solar spectral conversion.
abstract: The phosphors of Y2WO6:Bi3+, Ln3+ (Ln=Dy, Eu and Sm) were synthesized by solid-state reaction in this study. The crystal structure, photoluminescence properties and energy transfer mechanism were investigated. By introducing Bi3+ ions, the excitation band of the phosphors was broadened to be 250-380 nm, which could be absorbed by the dye-sensitized solar cells (DSSCs). The overlap between excitation of W-O groups/Bi3+ and the emission of Ln3+ (Dy, Eu, and Sm) indicated that the probability of energy transfer from W-O groups and Bi3+ to Ln3+. The energy transfer efficiency from Bi3+ to Ln3+ (Ln=Dy, Eu and Sm) are calculated to be 16%, 20% and 58%. This work suggested that Y2WO6:Bi3+, Ln3+ (Ln=Dy, Eu and Sm) might be a promising ultraviolet-absorbing luminescent converter to enhance the photoelectrical conversion efficiency of dye-sensitized solar cells (DSSCs).
authors.affiliation: State Key Laboratory of Luminescence Materials and Devices, and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, PR China.
authors.forename: M N
authors.initials: MN
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Luminescence Materials and Devices, and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, PR China.
authors.forename: Y Y
authors.initials: YY
authors.lastname: Ma
authors.affiliation: State Key Laboratory of Luminescence Materials and Devices, and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, PR China.
authors.forename: F
authors.initials: F
authors.lastname: Xiao
authors.affiliation: State Key Laboratory of Luminescence Materials and Devices, and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, PR China. Electronic address: qyzhang@scut.edu.cn.
authors.forename: Q Y
authors.initials: QY
authors.lastname: Zhang
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005063:Europium / Q000737:chemistry*; D049449:Luminescence; D049408:Luminescent Agents / Q000737:chemistry*; D008163:Luminescent Measurements; D008958:Models, Molecular; D012493:Samarium / Q000737:chemistry*; D012993:Solar Energy; D017973:Tungsten Compounds / Q000737:chemistry*; D015019:Yttrium / Q000737:chemistry*
chemical_list: D049408:Luminescent Agents; D017973:Tungsten Compounds; D012493:Samarium; D005063:Europium; D015019:Yttrium; C045951:tungstate; D001729:Bismuth
keywords: Energy transfer; Phosphors; Photoluminescence; Solar cells