Enhanced charge carrier lifetime and mobility as a result of Rb and Cs incorporation in hybrid perovskite
Name
063901_1_accepted_manuscript.pdf
Description
Accepted version
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6.17 MB
Format
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Checksum (MD5)
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Author(s)
Erodici, Matthew P
Pierone, Polly J
Hartono, Noor Titan Putri
Hidalgo, Juanita
Lai, Barry
Buonassisi, Tonio
Correa-Baena, Juan-Pablo
Sher, Meng-Ju
Date Issued
2021
Journal
Applied Physics Letters
Publisher
AIP Publishing
Citation
Erodici, Matthew P, Pierone, Polly J, Hartono, Noor Titan Putri, Hidalgo, Juanita, Lai, Barry et al. 2021. "Enhanced charge carrier lifetime and mobility as a result of Rb and Cs incorporation in hybrid perovskite." Applied Physics Letters, 118 (6).
Version
Author's final manuscript
Abstract
© 2021 Author(s). Alkali addition in organic-inorganic perovskite has become the standard recipe for achieving solar cells with efficiencies exceeding 20%, but the mechanism is not well understood. We use non-contact carrier lifetime measurements, mobility measurements, and synchrotron-based X-ray characterization techniques to show that there is a unique benefit to adding hybrid perovskite samples with Rb and Cs simultaneously. When either Rb or Cs is added, charge carrier mobility increases with alkali concentration. Charge carrier lifetime benefits from alkali incorporation as well, but is optimized with only moderate concentration at 1%. When both Rb and Cs are introduced, however, the high mobility is maintained and the charge carrier lifetime increases considerably. Our results show that when incorporated alone, Rb and Cs have very similar roles in a perovskite crystal, but when co-added, halide distribution becomes homogenized correlating with improved charge transport properties.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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DOI of Published Version
https://doi.org/10.1063/5.0030206
