title: Controlled thickness and morphology for highly efficient inverted planar heterojunction perovskite solar cells.
abstract: Recently, inverted planar heterojunction (PHJ) perovskite solar cells have been developed rapidly by numerous preparations and relative optimizations. Sequential solution deposition is easy to manipulate but it is difficult to control the thickness and morphology of perovskite films. In this article, we report an improved sequential deposition, named twice dipping-vapor solution deposition (TD-VSD) technology, to accurately achieve superior perovskite films. It is demonstrated that the morphology of perovskite films depended on the substrate temperatures as well as the dipping times. The resulting solar cells showed the power conversion efficiency as high as 11.77% based on the ideal thickness and morphology. This work provides a simple but effective fabrication to well control the perovskite films and enhance the power conversion efficiency for inverted PHJ solar cells.
authors.affiliation: Key Laboratory of Photonics Technology for information, Key Laboratory for Physical Electronics and Devices of the Ministry of Education, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China. zhaoxinwu@mail.xjtu.edu.cn.
authors.forename: Jun
authors.initials: J
authors.lastname: Xi
authors.forename: Zhaoxin
authors.initials: Z
authors.lastname: Wu
authors.forename: Hua
authors.initials: H
authors.lastname: Dong
authors.forename: Bin
authors.initials: B
authors.lastname: Xia
authors.forename: Fang
authors.initials: F
authors.lastname: Yuan
authors.forename: Bo
authors.initials: B
authors.lastname: Jiao
authors.forename: Lixin
authors.initials: L
authors.lastname: Xiao
authors.forename: Qihang
authors.initials: Q
authors.lastname: Gong
authors.forename: Xun
authors.initials: X
authors.lastname: Hou