title: Laser Crystallization of Organic-Inorganic Hybrid Perovskite Solar Cells.
abstract: Organic-inorganic hybrid perovskites attract enormous research interest for next generation solar energy harvest. Synergistic crystalline structures comprising organic and inorganic components enable solution processing of perovskite films. A reliable crystallization method for perovskites, compatible with fast continuous process over large-area flexible substrates, is crucial for high performance solar cell production. Here, we present laser crystallization of hybrid perovskite solar cells using near-infrared (NIR) laser (λ = 1064 nm). Crystalline morphology of CH3NH3PbI3 (MAPbI3) perovskite films are widely controllable with laser irradiation condition while maintaining film uniformity. Photothermal heating effectively assisted by interfacial photoconversion layers is critical for phase transformation without beam damage of multilayered device structures. Notably, laser crystallization attains higher device performances than conventional thermal annealing. Fast laser crystallization with manufacture level scan rate (1 m min(-1)) demonstrates inverted-type perovskite solar cells with 11.3 and 8.0% efficiencies on typical glass and flexible polymer substrates, respectively, without rigorous device optimization.
authors.affiliation: National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Taewoo
authors.initials: T
authors.lastname: Jeon
authors.affiliation: National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Hyeong Min
authors.initials: HM
authors.lastname: Jin
authors.affiliation: Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Seung Hyun
authors.initials: SH
authors.lastname: Lee
authors.affiliation: National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Ju Min
authors.initials: JM
authors.lastname: Lee
authors.affiliation: National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Hyung Il
authors.initials: HI
authors.lastname: Park
authors.affiliation: National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Mi Kyung
authors.initials: MK
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Keon Jae
authors.initials: KJ
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Byungha
authors.initials: B
authors.lastname: Shin
authors.affiliation: National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST , Daejeon 34141, Republic of Korea.
authors.forename: Sang Ouk
authors.initials: SO
authors.lastname: Kim
keywords: crystallization; flexible; laser; perovskite; solar cells