Nucleation‐Layer Assisted Quasi‐2D Ruddlesden‐Popper Tin Perovskite Solar Cells with High Oxygen Stability
Tin (Sn)-based perovskite solar cells (PSCs) are extremely vulnerable to oxygen. Nevertheless, mechanism understanding and fundamental strategies to achieve oxygen-stable Sn-based PSCs are lacking. Here a nucleation-layer assisted (NLA) strategy by forming nucleation layer at the interface of hole transport layer and perovskite to attain highly oxygen-stable quasi-2D Ruddlesden-Popper (RP) Sn-based PSCs is reported. The formation process of nucleation layer consists of washing off the prepared perovskite film and annealing the residue on the substrate, which produces a new substrate for perovskite film fabrication. Such nucleation layer can transform the subsequently deposited perovskite film from a small-n-value dominated wide phase distribution with random crystal orientation into an intermediate-n-value dominated narrow phase distribution with vertical crystal orientation. This nucleation layer also improves the perovskite film morphology with highly coadjacent flake-like grains, leading to reduced grain boundaries and pinholes. The resultant NLA perovskite film shows more efficient carrier transport capability, lower exciton-binding energy, weakened electron-phonon coupling, and significantly decreased oxygen diffusion rate upon oxygen exposure. Consequently, a quasi-2D RP Sn-based PSC with a champion efficiency of 11.18% is obtained. The unencapsulated device preserves 95% of its initial efficiency after a 2700-h oxygen aging test, creating a record oxygen stability for Sn-based PSCs.
Authors
- Zhenhuang Su (ORCID: https://orcid.org/0000-0003-0026-2601)
- Jiangzhao Chen (ORCID: https://orcid.org/0000-0002-9066-7217)
- Chuanxiao Xiao (ORCID: https://orcid.org/0000-0002-4136-2249)
- Zicheng Li (ORCID: https://orcid.org/0000-0002-7704-3063)
- Dewei Zhao (ORCID: https://orcid.org/0000-0001-7914-6288)
- Shengqiang Ren (ORCID: https://orcid.org/0000-0001-5335-6324)
- Jialun Jin
- Junyu Qu (ORCID: https://orcid.org/0000-0002-8430-1120)
- Hao Huang (ORCID: https://orcid.org/0000-0001-9785-996X)
- Yi Luo (ORCID: https://orcid.org/0009-0000-9669-5115)
- Xingyu Gao (ORCID: https://orcid.org/0000-0003-1477-0092)
- Wenqing Liang (ORCID: https://orcid.org/0000-0001-9770-882X)
- Hao Zhang (ORCID: https://orcid.org/0000-0002-3094-6222)
- Minghui Li (ORCID: https://orcid.org/0000-0002-2056-1249)
- Can Wang (ORCID: https://orcid.org/0000-0002-4404-7957)
- Xiaoxue Wang (ORCID: https://orcid.org/0000-0003-4581-537X)
- Yuliang Xu (ORCID: https://orcid.org/0009-0006-7324-3240)
- Yiting Jiang (ORCID: https://orcid.org/0009-0001-0434-5204)
- Zhiyu Gao (ORCID: https://orcid.org/0009-0006-8496-8669)
- Jingwei Zhu (ORCID: https://orcid.org/0009-0003-1221-4110)
- Wenbo Jiao
- Peng Gao (ORCID: https://orcid.org/0000-0003-4859-4488)
- Yongbo Huang (ORCID: https://orcid.org/0009-0003-7399-3234)
- Zhihao Zhang
Institutions
- Guangxi University (CN)
- Chinese Academy of Sciences (CN)
- Sichuan University (CN)
- Shanghai Advanced Research Institute (CN)
- Fujian Institute of Research on the Structure of Matter (CN)
- Ningbo Institute of Industrial Technology (CN)
- State Key Laboratory of Modern Optical Instruments (CN)
- Zhejiang University (CN)
Publication Details
- Journal
- Advanced Materials
- Published
- 2025-05-08
- DOI
- https://doi.org/10.1002/adma.202501156
- Citations
- 7
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 5.11
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Sichuan Province
- Fundamental Research Funds for Central Universities of the Central South University