Journal
NANOSCALE
Volume 8, Issue 12, Pages 6265-6270Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr06189j
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Funding
- National Science Foundation [DMR-1305913, OIA-1538893]
- U.S. Department of Energy SunShot Initiative under Next Generation Photovoltaics 3 program [DE-FOA-0000990, DE-AC36-08-GO28308]
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The microstructure of the solid-PbI2 precursor thin film plays an important role in the intercalation crystallization of the formamidinium lead triiodide perovskite (alpha-HC(NH2)(2)PbI3). It is shown that microstructurally engineered PbI2 thin films with porosity and low crystallinity are the most favorable for conversion into uniform-coverage, phase-pure alpha-HC(NH2)(2)PbI3 perovskite thin films. Planar perovskite solar cells fabricated using these thin films deliver power conversion efficiency (PCE) up to 13.8%.
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