journal article·2025-11-14

Enhancing Wide-Bandgap Perovskite Solar Cells with Synergistic Surface and Bulk Passivation

Thambidurai Mariyappan, Herlina Arianita Dewi, Joseph Chakar, Jean-Baptiste Puel, Daniela De Luca, Riyas Ahmad, Yue Tang, Matteo Degani, Giulia Grancini, Yvan Bonnassieux, Subodh G. Mhaisalkar, Annalisa Bruno

ACS Energy Letters· Volume 10· Issue 11
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Abstract

Wide-bandgap (WBG) perovskite solar cells (PSCs) are crucial for high-efficiency tandem photovoltaics; however, their performance and stability remain challenged. This work demonstrates the dual passivation role of 4-fluorinated-phenylethylammonium iodide (F-PEAI) in WBG PSCs. Using physics-based modeling and Bayesian analysis of the current density–voltage ( J – V ) curves, we have demonstrated for the first time that it is possible to identify the role of the passivation, either bulk or surface, which is difficult to separate using experimental analysis. The F-PEAI penetrates the perovskite layer, reducing defects, suppressing halide segregation, and improving charge transport. This results in PSCs with champion power conversion efficiency (PCE) of 20.6% for F-PEAI-passivated perovskites with a bandgap of 1.7 eV and 1 cm 2 PSCs with a PCE of 18.24%. Unencapsulated F-PEAI-treated PSCs retain their initial PCE more stably after 1000 h under inert and thermal conditions. These results emphasize the collaborative use of Bayesian and experimental approaches in revealing the distinct roles of F-PEAI for more stable and efficient WBG PSCs.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, 637553 Singapore

Laboratoire de Physique des Interfaces et des Couches Minces (LPICM), Centre National de la Recherche Scientifique (CNRS)

Ecole Polytechnique, Institut Polytechnique de Paris (IP Paris)

Institut Photovoltaïque d’Île-de-France (IPVF), 18 Boulevard Thomas Gobert, 91120 Palaiseau, France

EDF, R&D, 18 Boulevard Thomas Gobert, 91120 Palaiseau, France

Interdisciplinary Graduate Programme, Nanyang Technological University, Research Techno Plaza, 50 Nanyang Avenue, 637553 Singapore

Department of Chemistry and INSTM, University of Pavia, Via T. Taramelli 14, 27100 Pavia, Italy

School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore

SKKU Institute of Energy Science and Technology (SIEST)

Sungkyunkwan University

School of Physical and Mathematical Science

Nanyang Technological University

Funding

Agency for Science, Technology and Research · Ministry of Education - Singapore · Minist?re de l'Europe et des Affaires ?trang?res · Nanyang Technological University

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