Inductive effects in molecular contacts enable wide-bandgap perovskite cells for efficient perovskite/TOPCon tandems
Organic molecules that serve as hole-selective contacts, known as self-assembled monolayers (SAMs), play a pivotal role in ensuring high-performance perovskite photovoltaics. Optimal energy alignment between the SAM and the perovskite is essential for desired photovoltaic performance. However, many SAMs are studied in optimal-bandgap perovskites, with limited energy level modification specifically catering to wide-bandgap perovskites. Herein, we demonstrate that the energy level of SAMs can be systematically tuned in a stepwise manner via inductive effects in the conjugated moieties, enabling rational design tailored for specific perovskite bandgaps. The resulting WBG perovskite device based on our tuned SAM achieved a power conversion efficiency (PCE) of 22.8%. Integration with crystalline silicon TOPCon subcells further enabled the construction of a perovskite/TOPCon tandem device with a PCE of 31.1% (certified 30.9%).
Authors
- Ruzhang Liu (ORCID: https://orcid.org/0000-0002-9569-2622)
- Zhendong Cheng
- Caner Değer (ORCID: https://orcid.org/0000-0002-8472-1651)
- Xiaohe Miao (ORCID: https://orcid.org/0000-0001-5997-609X)
- Mengyuan Tian (ORCID: https://orcid.org/0000-0002-6727-7843)
- Jingjing Xue (ORCID: https://orcid.org/0000-0002-7861-8367)
- İlhan Yavuz (ORCID: https://orcid.org/0000-0002-3268-6268)
- Deren Yang (ORCID: https://orcid.org/0000-0002-1745-2105)
- Chen Liu (ORCID: https://orcid.org/0000-0001-5505-2447)
- Jiahui Shen (ORCID: https://orcid.org/0000-0003-2531-7752)
- Libing Yao (ORCID: https://orcid.org/0000-0002-0793-9921)
- Weiping Mao
- Ke‐Qing Zhao (ORCID: https://orcid.org/0000-0001-5703-3768)
- Rui Wang (ORCID: https://orcid.org/0000-0003-2185-0752)
- Xu Zhang (ORCID: https://orcid.org/0000-0002-6491-3234)
- Zhongwei Zhang (ORCID: https://orcid.org/0000-0002-5759-2487)
- Yixin Luo (ORCID: https://orcid.org/0000-0002-5592-162X)
- Na Dong (ORCID: https://orcid.org/0009-0008-6547-1248)
- Pengju Shi (ORCID: https://orcid.org/0009-0002-8078-5882)
- Yuan Tian (ORCID: https://orcid.org/0009-0001-8093-5513)
- Donger Jin
- Xuechun Sun
- J.C. Deng
Institutions
- Shaoxing University (CN)
- Westlake University (CN)
- Dongfang Electric Corporation (China) (CN)
- Institute of New Materials (CN)
- Marmara University (TR)
- Zhejiang University (CN)
- Yangzhou University (CN)
Publication Details
- Journal
- Nature Communications
- Published
- 2025-05-15
- DOI
- https://doi.org/10.1038/s41467-025-59896-8
- Citations
- 21
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 15.34
Funders
- Westlake University
- National Natural Science Foundation of China
- China Scholarship Council
- Fundamental Research Funds for the Central Universities
- Natural Science Foundation of Zhejiang Province