Molecular Design of Oligomers for Codeposited Perovskite Solar Cells: Enabling Synergistic Control of Crystallization and Carrier Dynamics

Achieving high-efficiency, stable perovskite solar cells (PSCs) requires simultaneous control of film defects and buried interfaces. Here, we report a codeposition strategy using rationally designed 4PACz oligomers. Featuring multidirectional phosphate groups, these oligomers self-assemble to tune the substrate work function, facilitate charge transport, and guide crystallization while passivating defects. Specifically, tri-4PACz achieves an optimal balance between solubility and defect suppression. Consequently, tri-4PACz-based PSCs deliver efficiencies of 26.2% (0.098 cm2) and 22.2% (69.5 cm2 modules). Unencapsulated devices retain 98.7% of initial efficiency after 1000 h of illumination and 96.6% after 500 h at 85 °C. This strategy effectively resolves the trade-off between structural control and defect passivation, paving the way for high-performance, stable PSCs.

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Publication Details

Journal
ACS Energy Letters
Published
2025-12-12
DOI
https://doi.org/10.1021/acsenergylett.5c03201
Citations
2
Primary Topic
Perovskite Materials and Applications
Type
article
Field-Weighted Citation Impact
1.46
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article

Molecular Design of Oligomers for Codeposited Perovskite Solar Cells: Enabling Synergistic Control of Crystallization and Carrier Dynamics

Zhenhuang Su, Weiwei Zuo, Antonio Abate, Zuhong Zhang et al.
2 citations
ACS Energy Letters
Perovskite Materials and Applications
1.46
article

Molecular Design of Oligomers for Codeposited Perovskite Solar Cells: Enabling Synergistic Control of Crystallization and Carrier Dynamics

Zhenhuang Su, Weiwei Zuo, Antonio Abate, Zuhong Zhang, Bingchen He, Meng Ke Li, Kexin Zhao, Michael Saliba, Bekele Hailegnaw, Jinsheng Song, Xingyu Gao, Ying Tang, Yanru Xue
article en
2 citations

Abstract

Achieving high-efficiency, stable perovskite solar cells (PSCs) requires simultaneous control of film defects and buried interfaces. Here, we report a codeposition strategy using rationally designed 4PACz oligomers. Featuring multidirectional phosphate groups, these oligomers self-assemble to tune the substrate work function, facilitate charge transport, and guide crystallization while passivating defects. Specifically, tri-4PACz achieves an optimal balance between solubility and defect suppression. Consequently, tri-4PACz-based PSCs deliver efficiencies of 26.2% (0.098 cm2) and 22.2% (69.5 cm2 modules). Unencapsulated devices retain 98.7% of initial efficiency after 1000 h of illumination and 96.6% after 500 h at 85 °C. This strategy effectively resolves the trade-off between structural control and defect passivation, paving the way for high-performance, stable PSCs.

ACS Energy LettersVol. 11(1)
University of Stuttgart (DE), Henan University (CN), Chinese Academy of Sciences (CN), Helmholtz-Zentrum Berlin für Materialien und Energie (DE), Ministry of Education (IR), Shanghai Advanced Research Institute (CN), Oxford Photovoltaics (United Kingdom) (GB)
Openalex Percentile: Top 14%
Perovskite Materials and Applications
1.46
DOISourceOpenAlex
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