Dual molecular bridges at perovskite heterointerfaces for efficient inverted solar cells
Utilizing molecular bridges presents a promising means to enhance the performance of perovskite solar cells (PSCs). However, concurrently bridging the perovskite absorber and its two adjacent interfaces remains a significant challenge that is yet to be achieved. Here, we construct dual molecular bridges at perovskite heterointerfaces, enabled by a self-organizing additive of 4-fluoro-phenethylammonium formate (4-F-PEAFa) and a synthesized hole transporter of [2-(7H-dibenzo[c, g]carbazol-7-yl)ethyl]phosphonic acid (DBZ-2PACz). The molecular bridges spanning two interfaces lead to the formation of an 'integral carrier transport pathway', mitigating both non-radiative recombination and charge-transport losses in the fabricated PSC devices. We thus achieve a champion power conversion efficiency (PCE) of 26.0% (25.6% certified) in inverted PSCs, accompanied by an exceptionally high fill factor of 0.87 (maximum 0.88 from the certified devices, 97% of its Shockley-Queisser limit) and a low ideality factor of 1.06. The unencapsulated devices retain 96% of their PCEs after aging at 85°C for 2200 h and 90% after maximum power point tracking at an elevated temperature of 50°C for 973 h.
Authors
- Liang Xiao (ORCID: https://orcid.org/0000-0001-9273-0331)
- Guangfu Luo (ORCID: https://orcid.org/0000-0002-0738-0507)
- Guoliang Wang (ORCID: https://orcid.org/0009-0008-0070-5920)
- Qing Lian (ORCID: https://orcid.org/0000-0002-9552-7555)
- Longbin Qiu (ORCID: https://orcid.org/0000-0002-7696-4901)
- Xihan Chen (ORCID: https://orcid.org/0000-0001-7907-2549)
- Manuel Kober‐Czerny (ORCID: https://orcid.org/0000-0002-7807-3133)
- Anita W. Y. Ho-Baillie (ORCID: https://orcid.org/0000-0001-9849-4755)
- Shaokuan Gong
- Deng Wang (ORCID: https://orcid.org/0000-0002-4464-9632)
- Hanlin Hu (ORCID: https://orcid.org/0000-0001-5617-0998)
- Joel A. Smith (ORCID: https://orcid.org/0000-0001-6889-4408)
- Wei Zhang (ORCID: https://orcid.org/0000-0003-2065-2535)
- Chun Cheng (ORCID: https://orcid.org/0000-0001-5976-3457)
- Pietro Caprioglio (ORCID: https://orcid.org/0000-0002-3465-2475)
- Henry James Snaith (ORCID: https://orcid.org/0000-0001-8511-790X)
- Xugang Guo (ORCID: https://orcid.org/0000-0001-6193-637X)
- Guojun Mi
- Jiong Yang (ORCID: https://orcid.org/0000-0002-4367-5281)
- Lina Wang (ORCID: https://orcid.org/0000-0002-1754-0308)
- Gang Li (ORCID: https://orcid.org/0000-0001-8399-7771)
- Dongyang Li (ORCID: https://orcid.org/0000-0003-3633-2050)
- Bowei Li (ORCID: https://orcid.org/0000-0002-8647-4068)
- Sibo Li (ORCID: https://orcid.org/0000-0001-5972-5207)
- Qiming Yin (ORCID: https://orcid.org/0009-0002-9826-9480)
- Baomin Xu
Institutions
- The University of Sydney (AU)
- Energy Institute (GB)
- Hong Kong Polytechnic University (HK)
- Shenzhen Polytechnic University (CN)
- Shanghai Jiao Tong University (CN)
- University of Surrey (GB)
- Southern University of Science and Technology (CN)
- Zhengzhou University (CN)
- University of Oxford (GB)
- Division of Materials Science and Engineering (AU)
Publication Details
- Journal
- National Science Review
- Published
- 2025-05-22
- DOI
- https://doi.org/10.1093/nsr/nwaf211
- Citations
- 7
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 5.11
Funders
- Ministry of Science and Technology
- National Natural Science Foundation of China
- University of Surrey
- Shanghai Jiao Tong University
- Science, Technology and Innovation Commission of Shenzhen Municipality
- Southern University of Science and Technology
- Engineering and Physical Sciences Research Council