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Suppressed phase segregation for triple-junction perovskite solar cells.
- Source :
-
Nature [Nature] 2023 Jun; Vol. 618 (7963), pp. 74-79. Date of Electronic Publication: 2023 Mar 28. - Publication Year :
- 2023
-
Abstract
- The tunable bandgaps and facile fabrication of perovskites make them attractive for multi-junction photovoltaics <superscript>1,2</superscript> . However, light-induced phase segregation limits their efficiency and stability <superscript>3-5</superscript> : 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 absorber <superscript>2,6</superscript> . 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.<br /> (© 2023. The Author(s), under exclusive licence to Springer Nature Limited.)
Details
- Language :
- English
- ISSN :
- 1476-4687
- Volume :
- 618
- Issue :
- 7963
- Database :
- MEDLINE
- Journal :
- Nature
- Publication Type :
- Academic Journal
- Accession number :
- 36977463
- Full Text :
- https://doi.org/10.1038/s41586-023-06006-7