Rubidium Induced Phase Regulation for High-Performance Quasi-2D Perovskite Solar Cells
Quasi-two-dimensional (2D) perovskites are notable for their diverse formulations and environmental stability. However, solution-processed quasi-2D perovskites often exhibit inherent multiple-quantum-well structures with broad phase distributions, limiting their efficiency in photovoltaic applications. Here, we demonstrate that incorporating rubidium ions effectively narrows the phase distribution in quasi-2D perovskite by accelerating the formation of the n = 1 2D perovskite phase during the initial crystallization stage. This leads to a decrease in the remaining free organic spacer cations, which in turn limits the transition to medium-n phases (n = 3, 4) and promotes the formation of high-quality 3D-like or large-n perovskites, ultimately enhancing charge transport of quasi-2D perovskite. Consequently, we achieve quasi-2D perovskite solar cells with a champion power conversion efficiency of 21.9%. Furthermore, the thermal stability of the unencapsulated devices containing rubidium is significantly improved, with the T80 lifetime under continuous 60 °C stress increasing from 1150 to over 3000 h.
Authors
- Jinfei Zhou (ORCID: https://orcid.org/0000-0003-3791-6365)
- Wen Liang Tan (ORCID: https://orcid.org/0000-0002-0180-3919)
- Daliang Zhang (ORCID: https://orcid.org/0000-0003-3494-7000)
- Jianpu Wang (ORCID: https://orcid.org/0000-0002-2158-8689)
- X X Wang
- Christopher Robert McNeill (ORCID: https://orcid.org/0000-0001-5221-878X)
- Renzhi Li (ORCID: https://orcid.org/0009-0004-6212-0283)
- Wenbo Liu (ORCID: https://orcid.org/0000-0001-5636-5461)
- Wei Huang (ORCID: https://orcid.org/0000-0001-7004-6408)
- Jingwei Li (ORCID: https://orcid.org/0000-0001-5137-0405)
- Yu Chen (ORCID: https://orcid.org/0000-0002-7258-2607)
- Bo Xu (ORCID: https://orcid.org/0000-0003-2758-7772)
- Xuan Gao (ORCID: https://orcid.org/0000-0003-1250-2537)
- Fengwei Wang (ORCID: https://orcid.org/0000-0002-4730-1578)
- Rong Yang
- Pinghui Yang
Institutions
- Australian Nuclear Science and Technology Organisation (AU)
- Nanjing Tech University (CN)
- Chongqing University (CN)
- Northwestern Polytechnical University (CN)
- Chinese University of Hong Kong (HK)
- Australian Synchrotron (AU)
- Changzhou University (CN)
- Monash University (AU)
Publication Details
- Journal
- ACS Energy Letters
- Published
- 2024-11-26
- DOI
- https://doi.org/10.1021/acsenergylett.4c02883
- Citations
- 11
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 2.30
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Jiangsu Province
- Nanjing Tech University
- Jiangsu Science and Technology Department
- National Key Research and Development Program of China