Towards stable perovskite multijunction solar cells: from nanometer- to wafer-scale
Christian Wolff a
a STI IEM PVLAB, EPFL
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV25)
Roma, Italy, 2025 May 12th - 14th
Organizers: Filippo De Angelis, Francesca Brunetti and Claudia Barolo
Invited Speaker Session, Christian Wolff, presentation 110
Publication date: 17th February 2025

Perovskite-based multijunction solar cells are on the brink of commercialization, with efficiencies skyrocketing in the past 5 years. E.g., the most efficient two-terminal configuration ever made is a perovskite/Si tandem. Yet, the reliability of these devices is still a big question mark. This is in part due to the short time since their development hindering decade-long tests due to sheer time constraints, but also because there is a lack of established accelerated aging protocols due to a lack of understanding of primary failure modes. In the presentation, I will cover our recent results looking at the perovskite cells in multijunctions and how nanometric defects trigger device degradation and how they can be mitigated. I will further discuss effects on the um- and cm-scale, e.g., how the choice of the silicon cell texturing affects performance and stability, as well as long-distance ionic effects and how precise control over different length scales enabled us to fabricate excellent wafer-scale devices beyond the state-of-the-art.

© FUNDACIO DE LA COMUNITAT VALENCIANA SCITO
We use our own and third party cookies for analysing and measuring usage of our website to improve our services. If you continue browsing, we consider accepting its use. You can check our Cookies Policy in which you will also find how to configure your web browser for the use of cookies. More info