Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 24, Issue 1, Pages 151-157Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201302090
Keywords
perovskite; solar cells; morphology; high efficiency; photovoltaics
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Funding
- EPSRC
- Oxford Photovoltaics Ltd. through a Nanotechnology KTN CASE award
- European Research Council (ERC) HYPER PROJECT [279881]
- King Abdullah University of Science and Technology (KAUST) [KUK-C1-013-04]
- EC
- Oxford Martin School
- Wolfson/Royal Society
- European Research Council (ERC) [279881] Funding Source: European Research Council (ERC)
- Engineering and Physical Sciences Research Council [1511477] Funding Source: researchfish
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Organometal trihalide perovskite based solar cells have exhibited the highest efficiencies to-date when incorporated into mesostructured composites. However, thin solid films of a perovskite absorber should be capable of operating at the highest efficiency in a simple planar heterojunction configuration. Here, it is shown that film morphology is a critical issue in planar heterojunction CH3NH3PbI3-xClx solar cells. The morphology is carefully controlled by varying processing conditions, and it is demonstrated that the highest photocurrents are attainable only with the highest perovskite surface coverages. With optimized solution based film formation, power conversion efficiencies of up to 11.4% are achieved, the first report of efficiencies above 10% in fully thin-film solution processed perovskite solar cells with no mesoporous layer.
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