title: Intercalation crystallization of phase-pure α-HC(NH₂)₂PbI₃ upon microstructurally engineered PbI₂ thin films for planar perovskite solar cells.
abstract: The microstructure of the solid-PbI2 precursor thin film plays an important role in the intercalation crystallization of the formamidinium lead triiodide perovskite (α-HC(NH2)2PbI3). It is shown that microstructurally engineered PbI2 thin films with porosity and low crystallinity are the most favorable for conversion into uniform-coverage, phase-pure α-HC(NH2)2PbI3 perovskite thin films. Planar perovskite solar cells fabricated using these thin films deliver power conversion efficiency (PCE) up to 13.8%.
authors.affiliation: School of Engineering, Brown University, Providence, RI 02912, USA. nitin_padture@brown.edu.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO 80401, USA. kai.zhu@nrel.gov.
authors.forename: Mengjin
authors.initials: M
authors.lastname: Yang
authors.affiliation: School of Engineering, Brown University, Providence, RI 02912, USA. nitin_padture@brown.edu.
authors.forename: Joonsuh
authors.initials: J
authors.lastname: Kwun
authors.affiliation: School of Engineering, Brown University, Providence, RI 02912, USA. nitin_padture@brown.edu.
authors.forename: Onkar S
authors.initials: OS
authors.lastname: Game
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P.R. China.
authors.forename: Yixin
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, P.R. China.
authors.forename: Shuping
authors.initials: S
authors.lastname: Pang
authors.affiliation: School of Engineering, Brown University, Providence, RI 02912, USA. nitin_padture@brown.edu.
authors.forename: Nitin P
authors.initials: NP
authors.lastname: Padture
authors.affiliation: Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO 80401, USA. kai.zhu@nrel.gov.
authors.forename: Kai
authors.initials: K
authors.lastname: Zhu