Journal article : Review
Polarons and charge localization in metal-halide semiconductors for photovoltaic and light-emitting devices
- Abstract:
- Metal-halide semiconductors have shown excellent performance in optoelectronic applications such as solar cells, light-emitting diodes, and detectors. In this review the role of charge–lattice interactions and polaron formation in a wide range of these promising materials, including perovskites, double perovskites, Ruddlesden–Popper layered perovskites, nanocrystals, vacancy-ordered, and other novel structures, is summarized. The formation of Fröhlich-type “large” polarons in archetypal bulk metal-halide ABX3 perovskites and its dependence on A-cation, B-metal, and X-halide composition, which is now relatively well understood, are discussed. It is found that, for nanostructured and novel metal-halide materials, a larger variation in the strengths of polaronic effects is reported across the literature, potentially deriving from variations in potential barriers and the presence of interfaces at which lattice relaxation may be enhanced. Such findings are further discussed in the context of different experimental approaches used to explore polaronic effects, cautioning that firm conclusions are often hampered by the presence of alternate processes and interactions giving rise to similar experimental signatures. Overall, a complete understanding of polaronic effects will prove essential given their direct influence on optoelectronic properties such as charge-carrier mobilities and emission spectra, which are critical to the performance of energy and optoelectronic applications.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
Actions
Access Document
- Files:
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(Preview, Accepted manuscript, 9.6MB, Terms of use)
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- Publisher copy:
- 10.1002/adma.202007057
Authors
- Publisher:
- Wiley
- Journal:
- Advanced Materials More from this journal
- Volume:
- 33
- Issue:
- 24
- Article number:
- 2007057
- Publication date:
- 2021-05-06
- Acceptance date:
- 2020-12-02
- DOI:
- EISSN:
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1521-4095
- ISSN:
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0935-9648
- Pmid:
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33955594
- Language:
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English
- Keywords:
- Subtype:
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Review
- Pubs id:
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1176062
- Local pid:
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pubs:1176062
- Deposit date:
-
2021-11-25
Terms of use
- Copyright holder:
- Wiley-VCH GmbH
- Copyright date:
- 2021
- Rights statement:
- © 2021 Wiley-VCH GmbH.
- Notes:
-
This is the accepted manuscript version of the article. The final version is available from Wiley at https://doi.org/10.1002/adma.202007057
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