title: Broadband downshifting luminescence in Cr³⁺₋Yb³⁺ codoped garnet for efficient photovoltaic generation.
abstract: The Cr³⁺₋Yb³⁺ codoped YAG crystals were synthesized by the solid state reaction method, in which the intense near-infrared emission around 1000 nm originated from Yb³⁺ ²F₅/₂ →²F₇/₂ transition was obtained due to the efficient energy transfer from Cr³⁺ to Yb³⁺. The stable and transient spectral measurements revealed that the phonon assistant energy transfer process is responsible for the energy transfer from Cr³⁺ to Yb³⁺ upon both the excitations of Cr³⁺: ⁴T₁ and ⁴T₂> energy levels. Due to the effective absorption of Cr³⁺ in the visible region in YAG and the efficient energy transfer to Yb³⁺, this material can be developed as spectral convertors to improve silicon solar cell photovoltaic conversion efficiency.
authors.affiliation: School of Materials Science and Engineering, Tongji University, Shanghai 201806, China. yesong@tongji.edu.cn
authors.forename: Song
authors.initials: S
authors.lastname: Ye
authors.forename: Jiajia
authors.initials: J
authors.lastname: Zhou
authors.forename: Shiting
authors.initials: S
authors.lastname: Wang
authors.forename: Rongxuan
authors.initials: R
authors.lastname: Hu
authors.forename: Deping
authors.initials: D
authors.lastname: Wang
authors.forename: Jianrong
authors.initials: J
authors.lastname: Qiu
mesh_terms: D011211:Electric Power Supplies; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008163:Luminescent Measurements / Q000295:instrumentation*; D012993:Solar Energy