Author
Listed:
- Zaiwei Wang
(University of Toronto)
- Lewei Zeng
(University of Toronto)
- Tong Zhu
(University of Toronto)
- Hao Chen
(University of Toronto)
- Bin Chen
(University of Toronto
Northwestern University)
- Dominik J. Kubicki
(University of Warwick)
- Adam Balvanz
(Northwestern University)
- Chongwen Li
(University of Toronto
The University of Toledo)
- Aidan Maxwell
(University of Toronto)
- Esma Ugur
(King Abdullah University of Science and Technology (KAUST))
- Roberto Reis
(Northwestern University)
- Matthew Cheng
(Northwestern University)
- Guang Yang
(University of North Carolina at Chapel Hill)
- Biwas Subedi
(The University of Toledo)
- Deying Luo
(University of Toronto)
- Juntao Hu
(Yunnan University)
- Junke Wang
(University of Toronto)
- Sam Teale
(University of Toronto)
- Suhas Mahesh
(University of Toronto)
- Sasa Wang
(University of Toronto)
- Shuangyan Hu
(University of Toronto)
- Eui Dae Jung
(University of Toronto)
- Mingyang Wei
(University of Toronto
Ecole Polytechnique Fedérale de Lausanne (EPFL))
- So Min Park
(University of Toronto)
- Luke Grater
(University of Toronto)
- Erkan Aydin
(King Abdullah University of Science and Technology (KAUST))
- Zhaoning Song
(The University of Toledo)
- Nikolas J. Podraza
(The University of Toledo)
- Zheng-Hong Lu
(University of Toronto
Yunnan University)
- Jinsong Huang
(University of North Carolina at Chapel Hill)
- Vinayak P. Dravid
(Northwestern University)
- Stefaan De Wolf
(King Abdullah University of Science and Technology (KAUST))
- Yanfa Yan
(The University of Toledo)
- Michael Grätzel
(Ecole Polytechnique Fedérale de Lausanne (EPFL))
- Merx G. Kanatzidis
(Northwestern University)
- Edward H. Sargent
(University of Toronto
Northwestern University
Northwestern University)
Abstract
The tunable bandgaps and facile fabrication of perovskites make them attractive for multi-junction photovoltaics1,2. However, light-induced phase segregation limits their efficiency and stability3–5: this occurs in wide-bandgap (>1.65 electron volts) iodide/bromide mixed perovskite absorbers, and becomes even more acute in the top cells of triple-junction solar photovoltaics that require a fully 2.0-electron-volt bandgap absorber2,6. Here we report that lattice distortion in iodide/bromide mixed perovskites is correlated with the suppression of phase segregation, generating an increased ion-migration energy barrier arising from the decreased average interatomic distance between the A-site cation and iodide. Using an approximately 2.0-electron-volt rubidium/caesium mixed-cation inorganic perovskite with large lattice distortion in the top subcell, we fabricated all-perovskite triple-junction solar cells and achieved an efficiency of 24.3 per cent (23.3 per cent certified quasi-steady-state efficiency) with an open-circuit voltage of 3.21 volts. This is, to our knowledge, the first reported certified efficiency for perovskite-based triple-junction solar cells. The triple-junction devices retain 80 per cent of their initial efficiency following 420 hours of operation at the maximum power point.
Suggested Citation
Zaiwei Wang & Lewei Zeng & Tong Zhu & Hao Chen & Bin Chen & Dominik J. Kubicki & Adam Balvanz & Chongwen Li & Aidan Maxwell & Esma Ugur & Roberto Reis & Matthew Cheng & Guang Yang & Biwas Subedi & Dey, 2023.
"Suppressed phase segregation for triple-junction perovskite solar cells,"
Nature, Nature, vol. 618(7963), pages 74-79, June.
Handle:
RePEc:nat:nature:v:618:y:2023:i:7963:d:10.1038_s41586-023-06006-7
DOI: 10.1038/s41586-023-06006-7
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