Vapour-Deposited Cesium Lead Iodide Perovskites: Microsecond Charge Carrier Lifetimes and Enhanced Photovoltaic Performance.
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Authors
Hutter, Eline M
Sutton, Rebecca J
Chandrashekar, Sanjana
Abdi-Jalebi, Mojtaba
Snaith, Henry J
Savenije, Tom J
Publication Date
2017-08-11Journal Title
ACS Energy Lett
ISSN
2380-8195
Publisher
American Chemical Society (ACS)
Volume
2
Issue
8
Pages
1901-1908
Language
eng
Type
Article
Physical Medium
Print-Electronic
Metadata
Show full item recordCitation
Hutter, E. M., Sutton, R. J., Chandrashekar, S., Abdi-Jalebi, M., Stranks, S., Snaith, H. J., & Savenije, T. J. (2017). Vapour-Deposited Cesium Lead Iodide Perovskites: Microsecond Charge Carrier Lifetimes and Enhanced Photovoltaic Performance.. ACS Energy Lett, 2 (8), 1901-1908. https://doi.org/10.1021/acsenergylett.7b00591
Abstract
Metal halide perovskites such as methylammonium lead iodide (MAPbI3) are highly promising materials for photovoltaics. However, the relationship between the organic nature of the cation and the optoelectronic quality remains debated. In this work, we investigate the optoelectronic properties of fully inorganic vapour-deposited and spin-coated black-phase CsPbI3 thin films. Using the time-resolved microwave conductivity technique, we measure charge carrier mobilities up to 25 cm2/(V s) and impressively long charge carrier lifetimes exceeding 10 μs for vapour-deposited CsPbI3, while the carrier lifetime reaches less than 0.2 μs in the spin-coated samples. Finally, we show that these improved lifetimes result in enhanced device performance with power conversion efficiencies close to 9%. Altogether, these results suggest that the charge carrier mobility and recombination lifetime are mainly dictated by the inorganic framework rather than the organic nature of the cation.
Identifiers
External DOI: https://doi.org/10.1021/acsenergylett.7b00591
This record's URL: https://www.repository.cam.ac.uk/handle/1810/284492
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International
Licence URL: https://creativecommons.org/licenses/by-nc-nd/4.0/
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