title: Efficient charge-transport in hybrid lead iodide perovskite solar cells.
abstract: Recently, highly efficient solar cells based on organic-inorganic perovskites have been intensively studied for developing fabricating methods and device structures. To improve the performance of perovskite film devices, delicate control of charge transfer material interconnectivity is required. Here, controlling the mesoporous TiO2 structure improves their charge collection and injection rate, and allows substantial enhancement of the corresponding device performance. We found that increasing the TiCl4 processing time deteriorates the device performance by introducing a large amount of excessively large perovskite particles, surface roughness and charge recombination. Proper TiCl4 processing dramatically improves the charge transport within the electron transfer layer, explaining the efficient performance of meso-superstructured solar cells.
authors.affiliation: School of Materials Science and Engineering, Shijiazhuang Tiedao University, 17 Northeast, Second Inner Ring, Shijiazhuang, 050043, China. jinjinzhao2012@163.com.
authors.forename: Jinjin
authors.initials: J
authors.lastname: Zhao
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.forename: Liyu
authors.initials: L
authors.lastname: Wei
authors.forename: Zhenghao
authors.initials: Z
authors.lastname: Liu
authors.forename: Xueqian
authors.initials: X
authors.lastname: Fang
authors.forename: Xianglin
authors.initials: X
authors.lastname: Liu
authors.forename: Deliang
authors.initials: D
authors.lastname: Ren
authors.forename: Yaohua
authors.initials: Y
authors.lastname: Mai