Morphological Control for High Performance, Solution-Processed Planar Heterojunction Perovskite Solar Cells

Type
Article

Authors
Eperon, Giles E.
Burlakov, Victor M.
Docampo, Pablo
Goriely, Alain
Snaith, Henry J.

KAUST Grant Number
KUK-C1-013-04

Online Publication Date
2013-09-09

Print Publication Date
2014-01

Date
2013-09-09

Abstract
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-xCl x 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. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Citation
Eperon GE, Burlakov VM, Docampo P, Goriely A, Snaith HJ (2013) Morphological Control for High Performance, Solution-Processed Planar Heterojunction Perovskite Solar Cells. Advanced Functional Materials 24: 151–157. Available: http://dx.doi.org/10.1002/adfm.201302090.

Acknowledgements
This work was supported by EPSRC and Oxford Photovoltaics Ltd. through a Nanotechnology KTN CASE award, the European Research Council (ERC) HYPER PROJECT no. 279881. This publication is based in part upon work supported by Award No. KUK-C1-013-04, made by King Abdullah University of Science and Technology (KAUST). A.G. is a Wolfson/Royal Society Merit Award Holder and acknowledges support from a Reintegration Grant under EC Framework VII. V.B. is an Oxford Martin School Fellow and this work was in part supported by the Oxford Martin School. The authors would like to thank Edward Crossland and James Ball for valuable discussions.

Publisher
Wiley

Journal
Advanced Functional Materials

DOI
10.1002/adfm.201302090

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