Dual Interface Modification for Reduced Nonradiative Recombination in n-i-p Methylammonium-Free Perovskite Solar Cells
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Date
2025-01-22
Authors
Rodriguez-Perez, Juan José
Esparza, Diego
Ans, Muhammad
Contreras-Solorio, David Armando
Diaz Perez, Teresa
Rodriguez Pereira, Jhonatan
Barea, Eva Maria
Zarazua, Isaac
Prochowicz, Daniel
Akin, Seckin
ORCID
Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
AMER CHEMICAL SOC
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Abstract
High defect concentrations at the interfaces are the basis of charge extraction losses and instability in perovskite solar cells. Surface engineering with organic cations is a common practice to solve this issue. However, the full implications of the counteranions of these cations for device functioning are often neglected. In this work, we used 4-fluorophenethylammonium cation with varying halide counteranions for the modification of both interfaces in methylammonium-free Pb-based n-i-p devices, observing significant differences among iodide, bromide, and chloride. The cation treatment of the buried and top interfaces resulted in improved surface quality of the perovskite films and largely improved carrier dynamics with reduced nonradiative recombination. Consequently, the optimal interface-modified methylammonium-free perovskite solar cells surpassed 20% efficiency and demonstrated remarkable operational stability. Our findings underscore the potential of comprehensive surface engineering strategies in advancing the perovskite film and device quality, thereby facilitating their broader and more successful applications.
Description
Citation
ACS applied materials & interfaces. 2025, vol. 17, issue 5, p. 8610-8618.
https://pubs.acs.org/doi/10.1021/acsami.4c20462
https://pubs.acs.org/doi/10.1021/acsami.4c20462
Document type
Peer-reviewed
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Published version
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Language of document
en