Proceedings of Online International Conference on Hybrid and Organic Photovoltaics (OnlineHOPV20)
Publication date: 22nd May 2020
Carbon dots (CDs) are nanoparticles with a carbon-rich core and, usually, a surface rich in functional groups such as carboxylic acids or amines. Their interesting properties, namely their absorption and fluorescence in the visible range, photo- and thermal stabilities, electrochemical properties and tuneable surface chemistry are some of the characteristics responsible for the high interest they have raised since their discovery. Some of these properties could also be beneficial for their use in combination with perovskite solar cells (PSCs). Although there are previous reports on carbon dots and PSCs being successfully combined, the general lack of understanding of useful CD properties is hampering even further progress. In this paper, we investigate the role of graphitic and amorphous nitrogen-doped carbon dots as additives for perovskite solar cells. The performances of the cells are evaluated, as well as the effect of the CDs on the stability of the devices. In each one of the considered cases, the introduction of a small amount of carbon dots was beneficial for the stability of the cells, and, under optimized conditions, their performances increased up to 109% of their initial performances after 40 days, while the reference’s dropped to 86%.
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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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