Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV23)
DOI: https://doi.org/10.29363/nanoge.hopv.2023.227
Publication date: 30th March 2023
Electron and hole transport layers are of outmost importance for thin film solar cells, determining not only their efficiency but also their stability. When considering the necessary steps to bring one of these thin film technologies towards commercialization, more factors besides efficiency and stability become important, for example the ease of deposition in a scalable manner and the cost of the different material’s layers. Herein, highly efficient organic solar cells (OSCs), in the so-called inverted structure (n-i-p), are demonstrated by using as electron transport layer (ETL) tin oxide (SnO2) deposited by atomic layer deposition (ALD) but also by nanocrystals. ALD is an industrial grade technique which can be applied both at the wafer level but also in a roll-to-roll configuration. A champion efficiency of 17.26% and a record FF of 79% is shown by PM6:L8-BO OSCs when using ALD-SnO2 as ETL. These devices outperform not only solar cells with SnO2 nanoparticles casted from solution (PCE 16.03%, FF 74%) but also those utilizing the more common sol-gel ZnO (PCE 16.84%, FF 77%). The outstanding results are attributed to a reduced charge carrier recombination at the interface between the ALD SnO2 and the active layer.
While SnO2 nanocrystals seems to have large problems of light soaking and stability, I will report a very simple method to increase performances of this solution processable ETL making devices become more stable and reaching efficiencies up to 16.26 for PM6:L8-BO OSCs.
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International Conference on Hybrid and Organic Photovoltaics
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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