title: Highly Efficient Perovskite Solar Cells with Substantial Reduction of Lead Content.
abstract: Despite organometal halide perovskite solar cells have recently exhibited a significant leap in efficiency, the Sn-based perovskite solar cells still suffer from low efficiency. Here, a series homogeneous CH3NH3Pb(1-x)SnxI3(0 ≤ x ≤ 1) perovskite thin films with full coverage were obtained via solvent engineering. In particular, the intermediate complexes of PbI2/(SnI2)∙(DMSO)xwere proved to retard the crystallization of CH3NH3SnI3, thus allowing the realization of high quality Sn-introduced perovskite thin films. The external quantum efficiency (EQE) of as-prepared solar cells were demonstrated to extend a broad absorption minimum over 50% in the wavelength range from 350 to 950 nm accompanied by a noteworthy absorption onset up to 1050 nm. The CH3NH3Pb0.75Sn0.25I3perovskite solar cells with inverted structure were consequently realized with maximum power conversion efficiency (PCE) of 14.12%.
authors.affiliation: Institute of Photovoltaics, College of Physics Science and Technology, Hebei University, Baoding, 071002, China.
authors.forename: Chong
authors.initials: C
authors.lastname: Liu
authors.affiliation: Institute of Photovoltaics, College of Physics Science and Technology, Hebei University, Baoding, 071002, China.|Institute of New Energy Technology, College of Information and Technology, Jinan University, Guangzhou, 510632, China.
authors.forename: Jiandong
authors.initials: J
authors.lastname: Fan
authors.affiliation: Institute of Photovoltaics, College of Physics Science and Technology, Hebei University, Baoding, 071002, China.
authors.forename: Hongliang
authors.initials: H
authors.lastname: Li
authors.affiliation: Institute of Photovoltaics, College of Physics Science and Technology, Hebei University, Baoding, 071002, China.
authors.forename: Cuiling
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Institute of Photovoltaics, College of Physics Science and Technology, Hebei University, Baoding, 071002, China.|Institute of New Energy Technology, College of Information and Technology, Jinan University, Guangzhou, 510632, China.
authors.forename: Yaohua
authors.initials: Y
authors.lastname: Mai