Multicomponent Solvent Engineered Spatially Uniform 2D/3D Perovskite Heterojunction for Solar Cells
This study introduces a multicomponent solvent engineering approach for constructing high-quality 2D/3D metal halide perovskite (MHP) heterostructures, addressing vertical inhomogeneity in ultrathin 2D capping layers for perovskite solar cells (PSCs). Through synergistic solvent coordination, isopropyl alcohol spatially confines 2D layer formation at the 3D perovskite surface, while dimethyl sulfoxide induces controlled 3D matrix dissolution to enable vertical phase propagation. Acetonitrile optimizes solvent penetration dynamics, achieving 2D layers with exceptional spatial homogeneity across multiple cation systems. The optimized PDAI2-derived 2D/3D architecture demonstrates a certified power conversion efficiency (PCE) of 25.57% (champion 26.14%) with an 85.62% fill factor, attributed to enhanced interfacial charge transport at the C60/perovskite junction through reduced nonradiative recombination. The spatially uniform 2D capping layer confers remarkable operational stability, retaining 92% initial PCE after 5,000 h dark aging and 90% efficiency following 1,700 h maximum power point tracking under continuous 1-sun illumination.
Authors
- Shengjie Du (ORCID: https://orcid.org/0009-0000-1715-4274)
- Guojia Fang (ORCID: https://orcid.org/0000-0002-3880-9943)
- Dexin Pu (ORCID: https://orcid.org/0009-0001-1439-8756)
- Ti Wang (ORCID: https://orcid.org/0000-0002-6828-7277)
- Weijun Ke (ORCID: https://orcid.org/0000-0003-2600-5419)
- Xingzhong Zhao
- Xihan Chen (ORCID: https://orcid.org/0000-0001-7907-2549)
- Shaokuan Gong
- Yang Zheng (ORCID: https://orcid.org/0000-0003-3575-7321)
- Wenbo Li (ORCID: https://orcid.org/0000-0002-5592-728X)
- Wei Liu (ORCID: https://orcid.org/0000-0003-4789-362X)
- Ke Wu (ORCID: https://orcid.org/0000-0003-2622-091X)
- Shaofu Wang (ORCID: https://orcid.org/0000-0002-9007-1747)
- Zhinan Zhang (ORCID: https://orcid.org/0000-0003-0500-2112)
- Zhenhua Yu (ORCID: https://orcid.org/0000-0002-0832-2384)
- Yinghao Xu (ORCID: https://orcid.org/0000-0001-6065-5250)
Institutions
- Ministry of Education of the People's Republic of China (CN)
- Energy Institute (GB)
- Southern University of Science and Technology (CN)
- Wuhan University (CN)
- Wuhan Textile University (CN)
Publication Details
- Journal
- ACS Energy Letters
- Published
- 2025-03-31
- DOI
- https://doi.org/10.1021/acsenergylett.5c00393
- Citations
- 10
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 7.30
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Guangdong Province
- Science, Technology and Innovation Commission of Shenzhen Municipality
- Science and Technology Department of Hubei Province
- Basic and Applied Basic Research Foundation of Guangdong Province