title: Long afterglow Sr4Al14O25:Eu,Dy phosphors as both scattering and down converting layer for CdS quantum dot-sensitized solar cells.
abstract: Long afterglow Sr4Al14O25:Eu,Dy phosphors were introduced into the TiO2 photoanode of CdS quantum dot-sensitized solar cells (QDSSCs) as both a scattering and down converting layer, and the photovoltaic performances of the cells were investigated. The results show that the cell with Sr4Al14O25:Eu,Dy achieves a power conversion efficiency of 1.40%, which is an increase of 38% compared to the cell without Sr4Al14O25:Eu,Dy (1.02%). The performance improvement is attributed to enhanced light harvesting via improved light absorption and scattering processes. After a single sun illumination for 1 min and subsequent removal of the light source, the cell with Sr4Al14O25:Eu,Dy could be driven even in the dark by the long persistent light from Sr4Al14O25:Eu,Dy.
authors.affiliation: Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, Department of Physics, East China Normal University, Shanghai, China. lkpan@phy.ecnu.edu.cn.
authors.forename: Hengchao
authors.initials: H
authors.lastname: Sun
authors.forename: Likun
authors.initials: L
authors.lastname: Pan
authors.forename: Guang
authors.initials: G
authors.lastname: Zhu
authors.forename: Xianqing
authors.initials: X
authors.lastname: Piao
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.forename: Zhuo
authors.initials: Z
authors.lastname: Sun