title: Efficient broadband near-infrared quantum cutting for solar cells.
abstract: Yb(2+) and Yb(3+) co-activated luminescent material that can cut one photon in ultraviolet and visible region into multi NIR photons could be used as a downconversion luminescent convertor in front of crystalline silicon solar cell panels to reduce thermalization loss of the solar cell. After a direct excitation of Yb(2+) ions, an intense Yb(3+) luminescence is observed based on a cooperative energy transfer process. The energy transfer process is discussed according to the dependence of Yb(3+) luminescence intensity on the excitation power and the ambient temperature.
authors.affiliation: State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, P. R. of China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Teng
authors.forename: Jiajia
authors.initials: J
authors.lastname: Zhou
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Liu
authors.forename: Song
authors.initials: S
authors.lastname: Ye
authors.forename: Jianrong
authors.initials: J
authors.lastname: Qiu