Journal
NANOSCALE
Volume 7, Issue 24, Pages 10595-10599Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr02866c
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We report an effective solvent engineering process to enable controlled perovskite crystal growth and a wider window for processing uniform and dense methyl ammonium lead iodide (MAPbI(3)) perovskite films. Planar heterojunction solar cells fabricated with this method demonstrate hysteresis-free performance with a power conversion efficiency around 10%. The crystal structure of an organic-based Pb iodide intermediate phase is identified for the first time, which is critical in controlling the crystal growth and optimizing thin film morphology.
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