Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV23)
DOI: https://doi.org/10.29363/nanoge.hopv.2023.129
Publication date: 30th March 2023
Organic semiconductors have shown an improvement in their molecular design resulting in a rapid increase in their efficiencies in organic photovoltaic and solar-to-fuel production.[1-3] The synthetic tunability of these semiconductors allows the preparation of low-cost and solution-processable materials with broad light absorption. Organic semiconductors heterojuction nanoparticles, prepared from a blend of conjugated polymer donor and non-fullerene small molecules acceptor, are currently among the most efficient visible light-active hydrogen evolution photocatalysts with an external quantum efficiency (EQE) for hydrogen evolution up to 7 % at a wavelength > 600 nm.[2] In this presentation, I will discuss the previusly unexplored charge carrier dynamics of such efficient donor/acceptor heterojunction nanoparticles photocatalysts for hydrogen evolution. Transient and operando photoinduced absorption spectroscopies, on timescales ranging from femtoseconds to seconds after light absorption, were employed to track the charge carrier dynamics of selected heterojunction nanoparticles, aimed to undestand their photophysycal properties and how this differs from those of organic solar cell devices.
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement no. 886664 (SGC).
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International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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