Electron accumulation across the perovskite layer enhances tandem solar cells with textured silicon
- Oussama Er-raji
- Christoph Messmer
- Rakesh R. Pradhan
- Oliver Fischer
- Vladyslav Hnapovskyi
- Sofiia Kosar
- Marco Marengo
- Mathias List
- Jared Faisst
- José P. Jurado
- Oleksandr Matiash
- Hannu P. Pasanen
- Adi Prasetio
- Badri Vishal
- Shynggys Zhumagali
- Anil R. Pininti
- Yashika Gupta
- Clemens Baretzky
- Esma Ugur
- Christopher E. Petoukhoff
- Martin Bivour
- Erkan Aydin
- Randi Azmi
- Jonas Schön
- Florian Schindler
- Martin C. Schubert
- Udo Schwingenschlögl
- Frédéric Laquai
- Ahmed A. Said
- Juliane Borchert
- Patricia S. C. Schulze
- Stefaan De Wolf
- Stefan W. Glunz
2025-09-04
Reducing charge carrier transport losses, improving selectivity, and minimizing nonradiative recombination are essential for enhancing the efficiency and stability of perovskite/silicon tandem solar cells. We used a hybrid two-step perovskite deposition method that is compatible with industry-standard textured silicon, incorporating a perovskite surface treatment based on 1,3-diaminopropane dihydroiodide. The interaction of this molecule with the perovskite surface increased the majority charge carrier concentration at the electron-selective contact, which reduced interfacial recombination. Simultaneously, this field-effect passivation increased the electron concentration across the entire intrinsic perovskite absorber, which increased conductivity and reduced transport losses. Combined, this yields high-performance, fully textured perovskite/silicon tandem solar cells, achieving a 1-sun AM1.5G conversion efficiency of 33.1% with an open-circuit voltage of 2.01 volts and an extended outdoor stability in the Red Sea Coast.