title: Efficient Perovskite Hybrid Solar Cells Through a Homogeneous High-Quality Organolead Iodide Layer.
abstract: Fabricating homogeneous and high-quality perovskite thin films via low-temperature solution processing is a challenge to realizing high-efficiency perovskite hybrid solar cells (pero-HSCs). Here, an approach is reported to realize smooth surface morphology of methylammonium lead iodide (CH3 NH3 PbI3 ) perovskite thin films via using strong-polar ethanol solution rather than less-polar isopropanol solution, which was previously used as the solvent for preparing perovskite thin films. In comparison with the pero-HSCs processed from isopropanol solution, more than 40% enhanced efficiency is observed from pero-HSCs processed from ethanol solution. The enhanced efficiency is attributed to a homogeneous high-quality perovskite thin film with dramatically low root-mean-square roughness and completely conversion of lead (II) iodide (PbI2 ) to CH3 NH3 PbI3 . The findings provide a simple way to realize high-efficiency high-reproducible pero-HSCs.
authors.affiliation: Department of Polymer Engineering, The University of Akron, Akron, OH, 44325, USA.
authors.forename: Kai
authors.initials: K
authors.lastname: Wang
authors.affiliation: Department of Polymer Engineering, The University of Akron, Akron, OH, 44325, USA.
authors.forename: Chang
authors.initials: C
authors.lastname: Liu
authors.affiliation: Department of Polymer Engineering, The University of Akron, Akron, OH, 44325, USA.|State Key Laboratory of Applied Organic Chemistry, College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China.
authors.forename: Pengcheng
authors.initials: P
authors.lastname: Du
authors.affiliation: State Key Laboratory of Applied Organic Chemistry, College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China.
authors.forename: Hao-Li
authors.initials: HL
authors.lastname: Zhang
authors.affiliation: Department of Polymer Engineering, The University of Akron, Akron, OH, 44325, USA.
authors.forename: Xiong
authors.initials: X
authors.lastname: Gong
keywords: perovskite solar cells; planar heterojunctions; reproducibility; thin-film morphology