Journal article
Efficient energy transfer mitigates parasitic light absorption in molecular charge-extraction layers for perovskite solar cells
- Abstract:
- Organic semiconductors are commonly used as charge-extraction layers in metal-halide perovskite solar cells. However, parasitic light absorption in the sun-facing front molecular layer, through which sun light must propagate before reaching the perovskite layer, may lower the power conversion efficiency of such devices. Here, we show that such losses may be eliminated through efficient excitation energy transfer from a photoexcited polymer layer to the underlying perovskite. Experimentally observed energy transfer between a range of different polymer films and a methylammonium lead iodide perovskite layer was used as basis for modelling the efficacy of the mechanism as a function of layer thickness, photoluminescence quantum efficiency and absorption coefficient of the organic polymer film. Our findings reveal that efficient energy transfer can be achieved for thin (≤10 nm) organic charge-extraction layers exhibiting high photoluminescence quantum efficiency. We further explore how the morphology of such thin polymer layers may be affected by interface formation with the perovskite.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, 1.1MB, Terms of use)
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- Publisher copy:
- 10.1038/s41467-020-19268-w
Authors
- Publisher:
- Springer Science
- Journal:
- Nature Communications More from this journal
- Volume:
- 11
- Issue:
- 1
- Article number:
- 5525
- Place of publication:
- England
- Publication date:
- 2020-11-02
- Acceptance date:
- 2020-10-05
- DOI:
- EISSN:
-
2041-1723
- ISSN:
-
2041-1723
- Pmid:
-
33139733
- Language:
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English
- Keywords:
- Pubs id:
-
1140463
- Local pid:
-
pubs:1140463
- Deposit date:
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2021-02-05
Terms of use
- Copyright holder:
- Eggimann et al.
- Copyright date:
- 2020
- Rights statement:
- ©2020 The Authors. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
- Licence:
- CC Attribution (CC BY)
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