Journal article
Steering perovskite precursor solutions for multijunction photovoltaics
- Abstract:
- Multijunction photovoltaics (PVs) are gaining prominence owing to their superior capability of achieving power conversion efficiencies (PCEs) beyond the radiative limit of single-junction cells1-8, where improving narrow bandgap tin–lead perovskites is critical for thin-film devices9. With a focus on understanding the chemistry of tin–lead perovskite precursor solutions, we herein find that Sn(II) species dominate interactions with precursors and additives and uncover the exclusive role of carboxylic acid in regulating solution colloidal properties and film crystallisation, and ammonium in improving film optoelectronic properties. Materials that combine these two function groups, amino acid salts, considerably improve the semiconducting quality and homogeneity of perovskite films, surpassing the effect of the individual functional groups when introduced as part of separate molecules. Our enhanced tin–lead perovskite layer allows us to fabricate solar cells with PCEs of 23.9, 29.7 (certified 29.26%), and 28.7% for single-, double-, and triple-junction devices, respectively. Our 1-cm2 triple-junction devices show PCEs of 28.4% (certified 27.28%). Encapsulated triple-junction cells maintain 80% of their initial efficiencies after 860 h maximum power point tracking in ambient. We further fabricate quadruple-junction devices and obtain PCEs of 27.9% with the highest open-circuit voltage of 4.94 V. This work establishes a new benchmark for multijunction PVs.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 13.4MB, Terms of use)
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(Preview, Supplementary materials, pdf, 3.4MB, Terms of use)
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- Publisher copy:
- 10.1038/s41586-024-08546-y
Authors
+ European Commission
More from this funder
- Funder identifier:
- https://ror.org/00k4n6c32
- Grant:
- 101075330
- Programme:
- Horizon Europe
+ Engineering and Physical Sciences Research Council
More from this funder
- Funder identifier:
- https://ror.org/0439y7842
- Grant:
- EP/X038777/1
- EP/S004947/1
- EP/T028513/1
- EP/Y029216/1
- EP/Y029135/1
- EP/M022900/1
+ UK Research and Innovation
More from this funder
- Funder identifier:
- https://ror.org/001aqnf71
- Grant:
- 10054976
- Publisher:
- Springer Nature
- Journal:
- Nature More from this journal
- Volume:
- 639
- Issue:
- 8053
- Pages:
- 93-101
- Place of publication:
- England
- Publication date:
- 2024-12-23
- Acceptance date:
- 2024-12-18
- DOI:
- EISSN:
-
1476-4687
- ISSN:
-
0028-0836
- Pmid:
-
39715627
- Language:
-
English
- Keywords:
- Pubs id:
-
2072302
- Local pid:
-
pubs:2072302
- Deposit date:
-
2024-12-28
Terms of use
- Copyright holder:
- Hu et al.
- Copyright date:
- 2024
- Rights statement:
- © The Author(s) 2024. 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence 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.
- Licence:
- CC Attribution (CC BY)
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