Improving Perovskite/CIGS Tandem Solar Cells for Higher Power Conversion Efficiency through Light Management and Bandgap Engineering
Perovskite and chalcopyrite materials are excellent absorbers for highly efficient, all-thin-film tandem solar cells. This work presents a certified world record for such a device, achieving a power conversion efficiency of 24.6 ± 1.1% under steady-state conditions. The best <i>IV</i> parameters extracted from certified current-voltage measurements presented a short-circuit current density of around 19.3 mA/cm<sup>2</sup>, an open-circuit voltage of 1.765 V, and a fill factor of 71.8%. In comparison to our previous record, the current density improved considerably, mainly due to the lowering of the bandgap of the bottom subcell and the improved optics of the top perovskite cell.
Authors
- Christian A. Kaufmann (ORCID: https://orcid.org/0000-0001-9168-2032)
- Nikolaus Weinberger (ORCID: https://orcid.org/0000-0002-0531-5306)
- Rutger Schlatmann (ORCID: https://orcid.org/0000-0002-5951-9435)
- R. Klenk (ORCID: https://orcid.org/0000-0003-2045-4301)
- Klaus Jäger (ORCID: https://orcid.org/0000-0002-6008-9559)
- Nicolas Otto
- Emil List (ORCID: https://orcid.org/0000-0001-9206-800X)
- Iver Lauermann (ORCID: https://orcid.org/0000-0002-9119-3770)
- Guillermo A. Farias-Basulto (ORCID: https://orcid.org/0000-0002-8419-1494)
- Tobias Bertram (ORCID: https://orcid.org/0000-0002-4060-7523)
- Stefan Gall
- Thede Mehlhop
Institutions
- HTW Berlin - University of Applied Sciences (DE)
- Universität Innsbruck (AT)
- Zuse Institute Berlin (DE)
- Helmholtz-Zentrum Berlin für Materialien und Energie (DE)
- Humboldt-Universität zu Berlin (DE)
- Global Climate Forum (DE)
Publication Details
- Journal
- ACS Applied Materials & Interfaces
- Published
- 2025-09-25
- DOI
- https://doi.org/10.1021/acsami.5c15458
- Citations
- 3
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 2.19