Regensburg 2025 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 32: Poster Session II

CPP 32.39: Poster

Thursday, March 20, 2025, 09:30–12:00, P3

Enhanced Stability of Perovskite Solar Cells via Double-End Coupling Silane — •Xinwei Tian, Xiongzhuo Jiang, and Peter Müller-Buschbaum — TUM School of Natural Science, Chair for Functional Materials, 85748 Garching, Germany

Containing reactive triethoxysilyl groups, 1,4-bis(triethoxysilyl)benzol (BTEB) has high thermal stability by forming robust siloxane networks through hydrolysis and condensation reaction. Besides, BTEB has good hydrophobicity, so it can function as a protective barrier to prevent moisture ingression into the sample, which ensures long-term operation of the perovskite solar cells (PSCs). BTEB can also passivate the interface defect, thus reducing non-radiative recombination. On the other hand, because of the surface passivation effect of BTEB, a smoother and more uniform film layer can be obtained, which can enhance light absorption and reduce scattering loss effectively. In this way, the power conversion efficiency (PCE) can also be improved. In our work, we aim to apply BTEB as the interface modification material, ethyl acetate as antisolvent, to construct inverted perovskite solar cells with higher efficiency and stability.

Keywords: perovskite solar cells; surface passivation; silane; thermal stability; 1,4-Bis(triethoxysilyl)benzol