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Controlled growth of organic-inorganic hybrid CH3NH3PbI3 perovskite thin films from phase-controlled crystalline powders

Title
Controlled growth of organic-inorganic hybrid CH3NH3PbI3 perovskite thin films from phase-controlled crystalline powders
Authors
Choi, Yong ChanLee, Se WonJo, Hyo JeongKim, Dae-HwanSung, Shi-Joon
DGIST Authors
Choi, Yong ChanKim, Dae-Hwan; Sung, Shi-Joon
Issue Date
2016
Citation
RSC Advances, 6(106), 104359-104365
Type
Article
Article Type
Article
Keywords
Crystalline MaterialsDichloromethaneGoldMorphology and StructuresN,N-DimethylformamideOrganic-Inorganic HybridOrganic SolventsPerovskitePerovskite Solar CellsPerovskite Thin FilmsPhotovoltaic PerformancePowdersPower Conversion EfficienciesSolar Cell FabricationSolar CellsSolution-Based ApproachesThin-Films
ISSN
2046-2069
Abstract
High-quality CH3NH3PbI3 (MAPbI3) crystalline powders were synthesized from a dispersion of MAPbI3 solution (solvent: N,N-dimethylformamide (DMF)) in the antisolvent dichloromethane. They were used as starting chemicals for precursor solutions. The PbI2-DMF-, perovskite-, and PbI2-MAI (methylammonium iodide)-DMF-dominant phases were preferentially formed under conditions of excess PbI2, moderate, and high-excess MAI input ratios, respectively. The input ratio of powders in fabricating the thin MAPbI3 films strongly affected not only the morphology and structure of the films, but also the photovoltaic performance of the devices using them. The devices were constructed as follows: Au/hole-transporting material/MAPbI3/mesoporous TiO2 layer/TiO2 blocking layer/F-doped SnO2. The best device performance was obtained from the powder with a specific ratio of PbI2:MAI = 1:1.6; the device exhibited a power conversion efficiency of ∼16% at 1.5G standard conditions. Our proposed method could provide a simple and versatile solution-based approach for a low-cost perovskite solar cell fabrication technology. © The Royal Society of Chemistry 2016.
URI
http://hdl.handle.net/20.500.11750/5146
DOI
10.1039/c6ra19203c
Publisher
Royal Society of Chemistry
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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