Enhanced Efficiency and Stability of Inverted Perovskite Solar Cells via Isomerization Engineering of Self‐Assembled Monolayers

Abstract Carbazole‐based SAMs show great promise as interfacial modifiers in inverted perovskite solar cells (PSCs). Their large dipole moments and covalent binding capabilities suppress charge recombination and enhance device stability. We designed two isomeric carbazole SAMs (EPACz and PPACz) by adjusting the phenyl ring position. PPACz exhibits a higher dipole moment (2.60 D versus 1.77 D for EPACz) and a narrower HOMO‐LUMO gap (2.39 eV), enabling superior hole extraction. PPACz‐based devices achieved an excellent PCE of 26.1% (versus 22.0% for EPACz), with 23.5% efficiency for 1 cm 2 devices. The stronger tridentate anchoring of PPACz to ITO (compared with EPACz) improves interfacial stability. Unencapsulated devices retained over 90% of their initial efficiency after 540 h, demonstrating exceptional durability. This work provides key insights for designing high‐performance SAMs in perovskite photovoltaics.

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Publication Details

Journal
Angewandte Chemie
Published
2025-09-25
DOI
https://doi.org/10.1002/ange.202513338
Primary Topic
Perovskite Materials and Applications
Type
article
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article

Enhanced Efficiency and Stability of Inverted Perovskite Solar Cells via Isomerization Engineering of Self‐Assembled Monolayers

Chao Lv, Ke Gao, Yawei Miao, Fariba Tajabadi et al.
Angewandte Chemie
Perovskite Materials and Applications
article

Enhanced Efficiency and Stability of Inverted Perovskite Solar Cells via Isomerization Engineering of Self‐Assembled Monolayers

Chao Lv, Ke Gao, Yawei Miao, Fariba Tajabadi, Yuexing Zhang, Zeyuan Hu, Qifan Xue, Longlong Geng, Ying Li, Jiayu Li, Xiangchuan Meng, Jing Wang, Ping Wu, Nima Taghavinia
article en

Abstract

Abstract Carbazole‐based SAMs show great promise as interfacial modifiers in inverted perovskite solar cells (PSCs). Their large dipole moments and covalent binding capabilities suppress charge recombination and enhance device stability. We designed two isomeric carbazole SAMs (EPACz and PPACz) by adjusting the phenyl ring position. PPACz exhibits a higher dipole moment (2.60 D versus 1.77 D for EPACz) and a narrower HOMO‐LUMO gap (2.39 eV), enabling superior hole extraction. PPACz‐based devices achieved an excellent PCE of 26.1% (versus 22.0% for EPACz), with 23.5% efficiency for 1 cm 2 devices. The stronger tridentate anchoring of PPACz to ITO (compared with EPACz) improves interfacial stability. Unencapsulated devices retained over 90% of their initial efficiency after 540 h, demonstrating exceptional durability. This work provides key insights for designing high‐performance SAMs in perovskite photovoltaics.

Angewandte ChemieVol. 137(46)
Sharif University of Technology (IR), Guangdong University of Technology (CN), Nanchang University (CN), Shandong University (CN), Taishan University (CN), Materials and Energy Research Center (IR), Dezhou University (CN), South China University of Technology (CN)
Openalex Percentile: Top 74%
Perovskite Materials and Applications
DOISourceOpenAlex
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