#6534. Mixing of Azetidinium in Formamidinium Tin Triiodide Perovskite Solar Cells for Enhanced Photovoltaic Performance and High Stability in Air

February 2027publication date
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Journal’s subject area:
Chemical Engineering (all);
Energy (all);
Materials Science (all);
Environmental Chemistry;
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Abstract:
Overcoming the issue of the stability of tin-based perovskites is a major challenge for the commercial development of lead-free perovskite solar cells. To attack this problem, a new organic cation, azetidinium (AZ), is incorporated into the crystal structure of formamidinium tin triiodide (FASnI3) to form the mixed-cation perovskite AZxFA1-xSnI3. As AZ has a similar size to FA but a larger dipole moment, hybrid AZxFA1-xSnI3 films exhibit variation in optical and electronic properties on increasing the proportion of AZ. Trifluoromethylbenzene (CF3C6H5) serves as antisolvent to fabricate smooth and uniform perovskite films for the devices with an inverted planar heterojunction structure.
Keywords:
antisolvent effects; azetidinium; perovskites; solar cells; tin

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