title: Mixed solvents for the optimization of morphology in solution-processed, inverted-type perovskite/fullerene hybrid solar cells.
abstract: We investigate mixed solvents of N,N-dimethylformamide (DMF) and γ-butyrolactone (GBL) to produce the smooth surface of a perovskite film and uniform crystal domains. This ideal morphology from mixed solvents enhances the power conversion efficiency to over 6% by improving the exciton dissociation efficiency and reducing the recombination loss at both interfaces of PEDOT:PSS/perovskite and perovskite/PCBM.
authors.affiliation: School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, South Korea. jykim@unist.ac.kr.
authors.forename: Hak-Beom
authors.initials: HB
authors.lastname: Kim
authors.forename: Hyosung
authors.initials: H
authors.lastname: Choi
authors.forename: Jaeki
authors.initials: J
authors.lastname: Jeong
authors.forename: Seongbeom
authors.initials: S
authors.lastname: Kim
authors.forename: Bright
authors.initials: B
authors.lastname: Walker
authors.forename: Seyeong
authors.initials: S
authors.lastname: Song
authors.forename: Jin Young
authors.initials: JY
authors.lastname: Kim