Journal article
CsI-antisolvent adduct formation in all-inorganic metal halide perovskites
- Abstract:
- The excellent optoelectronic properties demonstrated by hybrid organic/inorganic metal halide perovskites are all predicated on precisely controlling the exact nucleation and crystallization dynamics that occur during film formation. In general, high‐performance thin films are obtained by a method commonly called solvent engineering (or antisolvent quench) processing. The solvent engineering method removes excess solvent, but importantly leaves behind solvent that forms chemical adducts with the lead‐halide precursor salts. These adduct‐based precursor phases control nucleation and the growth of the polycrystalline domains. There has not yet been a comprehensive study comparing the various antisolvents used in different perovskite compositions containing cesium. In addition, there have been no reports of solvent engineering for high efficiency in all‐inorganic perovskites such as CsPbI3. In this work, inorganic perovskite composition CsPbI3 is specifically targeted and unique adducts formed between CsI and precursor solvents and antisolvents are found that have not been observed for other A‐site cation salts. These CsI adducts control nucleation more so than the PbI2–dimethyl sulfoxide (DMSO) adduct and demonstrate how the A‐site plays a significant role in crystallization. The use of methyl acetate (MeOAc) in this solvent engineering approach dictates crystallization through the formation of a CsI–MeOAc adduct and results in solar cells with a power conversion efficiency of 14.4%.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Accepted manuscript, 1.3MB, Terms of use)
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- Publisher copy:
- 10.1002/aenm.201903365
Authors
- Publisher:
- Wiley
- Journal:
- Advanced Energy Materials More from this journal
- Volume:
- 10
- Issue:
- 9
- Article number:
- 1903365
- Publication date:
- 2020-01-31
- Acceptance date:
- 2020-01-10
- DOI:
- EISSN:
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1614-6840
- ISSN:
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1614-6832
- Language:
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English
- Keywords:
- Pubs id:
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1084039
- Local pid:
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pubs:1084039
- Deposit date:
-
2020-01-30
Terms of use
- Copyright holder:
- Wiley
- Copyright date:
- 2020
- Rights statement:
- © 2020 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim
- Notes:
- This is the accepted manuscript version of the article. The final version is available from Wiley at: https://doi.org/10.1002/aenm.201903365
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