Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
Publication date: 18th December 2023
Metal halide perovskites are a well-known family of solar cell materials. Despite their remarkable photovoltaic capabilities, there are a number of major obstacles in the field of metal halide perovskite solar cells (PSCs). These include limited light absorption at the edge of the infrared spectrum. One approach to address them is to modify the active layer by doping or even creating complex composites, which is common for the production of PSCs by solution-processed methods, but less so for the thermal evaporation method. However, thermal evaporation allows solubility problems to be solved as well as homogeneous distribution of the additive.
In this study, we focused on the modification of the perovskite layer. A composite consisting of a small organic molecule with near-infrared absorption (BDP-OMe) and perovskite (FA1-xCsxPbI3-xBrx) was deposited by thermal co-evaporation.
The composite formation was confirmed by UVvis, UPS, XPS methods. The presence of BDP-OMe broadens the absorption of composite. It was also shown that the composite formation does not disturb the perovskite crystal lattice.
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