Year: 2025
Type: article
Abstract: Hybrid halide perovskites are among the most promising candidates for next‐generation photovoltaics. The most investigated perovskite solar cells are lead based, which poses environmental concerns, making finding sustainable alternatives a pressing issue. Tin‐based halide perovskites are attracting interest as an alternative. However, their application in photovoltaics is hindered by the high concentration of defects and sensitivity to oxidation, compromising their performance and stability. Herein, perfluoroarene organic cations, namely 2‐(perfluorophenyl)methylammonium (F‐BNA) and 1,4‐(perfluorophenyl)dimethylammonium (F‐PDMA), are applied to form layered (2D) Ruddlesden–Popper and Dion–Jacobson tin‐based perovskites, respectively. Following a detailed structural and optoelectronic characterization, the perfluoroarenes are applied to formamidinium (FA)‐based FASnI 3 perovskite solar cells and an effective solvent is identified for their processing, 2‐pentanol. While F‐PDMA forms a 2D/3D heterostructure, F‐BNA remains assembled as a molecular interlayer, demonstrating higher photovoltaic performance with limited operational stability. This challenges the conventional role of mixed‐dimensional heterostructures in tin perovskite photovoltaics and opens new perspectives for advanced material design and device engineering.
Authors: Mengqiong Zhu, Shivam Singh, Alejandra Maria Castro Chong, Jong‐Min Kim, Fulya Koc, Debendra Prasad Panda, Paul Zimmermann, Alexander Hinderhofer, Weifan Luo, Ghewa Alsabeh, Muhammad Okash Ur Rehman, Gyeongcheon Choi, Dmitry Chernyshov, Frank Schreiber, Ji‐Youn Seo, Yana Vaynzof, Antonio Abate, Jovana V. Milić
Institutions: University of Fribourg, Adolphe Merkle Institute, Leibniz Institute for Solid State and Materials Research, Technische Universität Dresden, Pusan National University, University of Naples Federico II, University of Tübingen, École Polytechnique Fédérale de Lausanne, European Synchrotron Radiation Facility, Bielefeld University, Helmholtz-Zentrum Berlin für Materialien und Energie
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,910
Funders: National Science Foundation, European Commission, National Research Foundation, European Synchrotron Radiation Facility, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Bundesministerium für Bildung und Forschung, Ministry of Education, National Research Foundation of Korea, China Scholarship Council, Université de Fribourg, Leibniz-Gemeinschaft
OpenAlex ID: W4409965157