title: Solvent engineering towards controlled grain growth in perovskite planar heterojunction solar cells.
abstract: We report an effective solvent engineering process to enable controlled perovskite crystal growth and a wider window for processing uniform and dense methyl ammonium lead iodide (MAPbI3) perovskite films. Planar heterojunction solar cells fabricated with this method demonstrate hysteresis-free performance with a power conversion efficiency around 10%. The crystal structure of an organic-based Pb iodide intermediate phase is identified for the first time, which is critical in controlling the crystal growth and optimizing thin film morphology.
authors.affiliation: Department of Electrical and Computer Engineering and Materials Science and Engineering Program, University of Houston, Houston, Texas 77204, USA. yyao4@uh.edu.
authors.forename: Yaoguang
authors.initials: Y
authors.lastname: Rong
authors.forename: Zhongjia
authors.initials: Z
authors.lastname: Tang
authors.forename: Yufeng
authors.initials: Y
authors.lastname: Zhao
authors.forename: Xin
authors.initials: X
authors.lastname: Zhong
authors.forename: Swaminathan
authors.initials: S
authors.lastname: Venkatesan
authors.forename: Harrison
authors.initials: H
authors.lastname: Graham
authors.forename: Matthew
authors.initials: M
authors.lastname: Patton
authors.forename: Yan
authors.initials: Y
authors.lastname: Jing
authors.forename: Arnold M
authors.initials: AM
authors.lastname: Guloy
authors.forename: Yan
authors.initials: Y
authors.lastname: Yao