title: Perovskite solar cells with a DMSO-treated PEDOT:PSS hole transport layer exhibit higher photovoltaic performance and enhanced durability.
abstract: Despite being the most commonly used hole transport layer for p-i-n perovskite solar cells, the conventional PEDOT:PSS layer is far from being optimal for the best photovoltaic performance. Herein, we demonstrate highly conductive thin DMSO-doped PEDOT:PSS layers which significantly enhance the light harvesting, charge extraction, and photocurrent production of organo-lead iodide devices. Both imaging and X-ray analysis reveal that the perovskite thin films grown on DMSO-doped PEDOT:PSS exhibit larger grains with increased crystallinity. Altogether, these improvements result in a 37% boost in the power conversion efficiency (PCE) compared to standard p-i-n photovoltaics with pristine PEDOT:PSS. Furthermore, we demonstrate that DMSO-doped PEDOT:PSS devices possess enhanced PCE durability over time which we attribute primarily to fill factor stability.
authors.affiliation: Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing 100044, PR China. zhengxu@bjtu.edu.cn and Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06511, USA. andre.taylor@yale.edu and Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, PR China.
authors.forename: Di
authors.identifier: http://orcid.org/0000-0002-7279-9398
authors.initials: D
authors.lastname: Huang
authors.affiliation: Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06511, USA. andre.taylor@yale.edu.
authors.forename: Tenghooi
authors.initials: T
authors.lastname: Goh
authors.affiliation: Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06511, USA. andre.taylor@yale.edu.
authors.forename: Jaemin
authors.identifier: http://orcid.org/0000-0002-6496-9879
authors.initials: J
authors.lastname: Kong
authors.affiliation: Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06511, USA. andre.taylor@yale.edu.
authors.forename: Yifan
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing 100044, PR China. zhengxu@bjtu.edu.cn and Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, PR China.
authors.forename: Suling
authors.initials: S
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing 100044, PR China. zhengxu@bjtu.edu.cn and Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, PR China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Xu
authors.affiliation: Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06511, USA. andre.taylor@yale.edu.
authors.forename: André D
authors.initials: AD
authors.lastname: Taylor