title: Perovskite solar cell with an efficient TiO₂ compact film.
abstract: A perovskite solar cell with a thin TiO2 compact film prepared by thermal oxidation of sputtered Ti film achieved a high efficiency of 15.07%. The thin TiO2 film prepared by thermal oxidation is very dense and inhibits the recombination process at the interface. The optimum thickness of the TiO2 compact film prepared by thermal oxidation is thinner than that prepared by spin-coating method. Also, the TiO2 compact film and the TiO2 porous film can be sintered at the same time. This one-step sintering process leads to a lower dark current density, a lower series resistance, and a higher recombination resistance than those of two-step sintering. Therefore, the perovskite solar cell with the TiO2 compact film prepared by thermal oxidation has a higher short-circuit current density and a higher fill factor.
authors.affiliation: Key Laboratory of Artificial Micro- and Nano-Structures of the Ministry of Education of China, Department of Electronic Science and Technology, School of Physics and Technology, Wuhan University , Wuhan 430072, People's Republic of China.
authors.forename: Weijun
authors.initials: W
authors.lastname: Ke
authors.forename: Guojia
authors.initials: G
authors.lastname: Fang
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.forename: Pingli
authors.initials: P
authors.lastname: Qin
authors.forename: Hong
authors.initials: H
authors.lastname: Tao
authors.forename: Hongwei
authors.initials: H
authors.lastname: Lei
authors.forename: Qin
authors.initials: Q
authors.lastname: Liu
authors.forename: Xin
authors.initials: X
authors.lastname: Dai
authors.forename: Xingzhong
authors.initials: X
authors.lastname: Zhao
keywords: compact electron transporting layer; interface resistance; one-step sintering; perovskite; solar cell