Controlling Intermediate Phase Formation to Enhance Photovoltaic Performance of Inverted FA-Based Perovskite Solar Cells
Formamidinium (FA)-based perovskites exhibit significant potential for highly efficient photovoltaics due to their promising optoelectronic properties and optimal bandgap. However, the undesired inactive phase arises from multiple crystal nucleation pathways formed by various intermediate phases during the film formation process, persistently accompanying it. FA-based perovskites frequently struggle to form uniform, highly crystalline films. This challenge complicates the development of reliable and highly reproducible crystallization processes for perovskites and the establishment of guidelines for controlling the α-phase formation. In this work, we investigate the role of poly(acrylonitril-co-methyl acrylate) (PAM) to simultaneously control nucleation and subsequent α-phase crystallization. This successfully demonstrates the regulation of oriented crystal growth through the creation of a PAM-PbI2 intermediate. Ultimately, PAM-modified p–i–n architecture devices obtain a promising power conversion efficiency (PCE) of 25.30%, with VOC (1.211 V), achieving 95% of the detailed balance limit. Additionally, PAM-modified devices maintain ≥90% of the initial efficiency for 1000 h under 1 sun and 65 °C operation.
Authors
- Marcus Halik (ORCID: https://orcid.org/0000-0001-5976-0862)
- Larry Lüer (ORCID: https://orcid.org/0000-0001-9952-4207)
- Karen Forberich (ORCID: https://orcid.org/0009-0001-8743-9045)
- Kaicheng Zhang (ORCID: https://orcid.org/0000-0003-3468-3543)
- Tobias Unruh (ORCID: https://orcid.org/0000-0002-8903-4850)
- Silke Christiansen (ORCID: https://orcid.org/0000-0002-4908-4087)
- Hyoungwon Park (ORCID: https://orcid.org/0000-0002-7614-6415)
- Andreas Späth (ORCID: https://orcid.org/0000-0002-6633-5124)
- Fabian Streller (ORCID: https://orcid.org/0000-0001-5069-2429)
- Shudi Qiu (ORCID: https://orcid.org/0000-0002-3005-5788)
- Andres Osvet (ORCID: https://orcid.org/0000-0001-9098-9171)
- Jianchang Wu (ORCID: https://orcid.org/0000-0002-7087-2205)
- Zhiqiang Xie (ORCID: https://orcid.org/0009-0006-9562-9291)
- Zijian Peng (ORCID: https://orcid.org/0000-0003-3678-6538)
- Jiyun Zhang (ORCID: https://orcid.org/0000-0001-6939-4771)
- Thomas Heumueller (ORCID: https://orcid.org/0000-0002-6974-410X)
- R. Fink (ORCID: https://orcid.org/0000-0002-6896-4266)
- Vincent M. Le Corre (ORCID: https://orcid.org/0000-0001-6365-179X)
- Chao Liu (ORCID: https://orcid.org/0009-0004-1281-5861)
- Ning Li (ORCID: https://orcid.org/0000-0003-1208-4638)
- Mingjie Feng
- Ying Shang (ORCID: https://orcid.org/0009-0002-2163-4267)
- Jingjing Tian (ORCID: https://orcid.org/0000-0003-1396-0986)
- Santanu Maiti (ORCID: https://orcid.org/0000-0003-1491-6688)
- Ji-Won Byun (ORCID: https://orcid.org/0009-0001-3605-8867)
- Chaohui Li (ORCID: https://orcid.org/0000-0002-8399-4244)
- Lirong Dong
- Christoph J. Brabec
Institutions
- Friedrich-Alexander-Universität Erlangen-Nürnberg (DE)
- Instituto de Ciencia de Materiales de Sevilla (ES)
- Helmholtz Institute Erlangen-Nürnberg (DE)
- Advanced Materials and Devices (United States) (US)
- Fraunhofer Institute for Ceramic Technologies and Systems (DE)
- South China University of Technology (CN)
Publication Details
- Journal
- ACS Energy Letters
- Published
- 2024-10-17
- DOI
- https://doi.org/10.1021/acsenergylett.4c02580
- Citations
- 9
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 1.88
Funders
- Solar Technologies go Hybrid
- Deutscher Akademischer Austauschdienst
- Deutsche Forschungsgemeinschaft
- Bundesministerium für Bildung und Forschung
- China Scholarship Council
- Bayerisches Staatsministerium für Wissenschaft und Kunst