Metal Phosphorus Chalcogenide Nanosheet-Modified SnO<sub>2</sub> Electron Transport Layers for Efficient Perovskite Solar Cells
The electron transport layer (ETL) of tin dioxide (SnO<sub>2</sub>) plays a pivotal role in n-i-p perovskite solar cells (PSCs) by facilitating the extraction of photogenerated electrons and blocking the transport of holes. However, the presence of oxygen vacancies in SnO<sub>2</sub> adversely affects the quality of the ETLs and impairs the electron transport properties, reducing the performance of PSCs. Here, we present a novel interfacial engineering route by incorporating an exfoliated two-dimensional (2D) metal-phosphorus-chalcogen complex of the SnPS<sub>3</sub> nanosheets into the SnO<sub>2</sub> ETL. The sulfur atoms in the SnPS<sub>3</sub> nanosheets fill the oxygen vacancies in SnO<sub>2</sub>, reducing the trap state density. Meanwhile, the SnPS<sub>3</sub>-modified SnO<sub>2</sub> layer exhibits an improved energy level alignment and enhanced electrical conductivity. As a result, a remarkable efficiency improvement from 21.51 to 23.01% was observed, accompanied by optimized stability. These results expand the application scenarios of 2D metal-phosphorus-chalcogen complexes and provide a novel approach to tune SnO<sub>2</sub>-based interfaces for PSCs.
Authors
- Zhonghui Du
- Peter Schaaf (ORCID: https://orcid.org/0000-0002-8802-6621)
- Peter A. van Aken (ORCID: https://orcid.org/0000-0003-1890-1256)
- Fedor Lipilin (ORCID: https://orcid.org/0009-0001-4649-032X)
- Runfeng Chen (ORCID: https://orcid.org/0000-0003-0222-0296)
- Zhizhi Wang (ORCID: https://orcid.org/0000-0002-1213-479X)
- Zdeněk Sofer (ORCID: https://orcid.org/0000-0002-1391-4448)
- Mingguang Li (ORCID: https://orcid.org/0009-0004-5962-8211)
- Honglei Wang (ORCID: https://orcid.org/0000-0003-2007-6048)
- Dong Wang (ORCID: https://orcid.org/0000-0001-5940-9538)
- Wei Wan (ORCID: https://orcid.org/0000-0002-5254-1234)
- Hongguang Wang (ORCID: https://orcid.org/0000-0001-8552-2323)
- Zheng Zhu (ORCID: https://orcid.org/0000-0002-4435-1692)
- Yaqing Chen (ORCID: https://orcid.org/0009-0007-6308-5637)
Institutions
- Technische Universität Ilmenau (DE)
- Shenzhen Polytechnic University (CN)
- Nanjing University of Posts and Telecommunications (CN)
- Max Planck Institute for Solid State Research (DE)
- The Polytechnic University of Japan (JP)
- University of Chemistry and Technology, Prague (CZ)
Publication Details
- Journal
- ACS Applied Materials & Interfaces
- Published
- 2025-04-28
- DOI
- https://doi.org/10.1021/acsami.5c02547
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Shenzhen Polytechnic
- Ministry of Education, Youth and Science
- Natural Science Foundation of Jiangsu Province
- Horizon 2020 Framework Programme
- European Regional Development Fund