Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV24)
DOI: https://doi.org/10.29363/nanoge.hopv.2024.061
Publication date: 6th February 2024
In recent years, self-assembled monolayers (SAMs) have revolutionized the design of perovskite solar cells (PSCs), particularly in p-i-n ("inverted") architectures, thanks to their low-temperature processing, minimal material usage, and excellent operational stability. This has made them the preferred material for hole-selective contacts on ITO. However, this preference doesn't extend to n-i-p (or "regular") architectures. Despite the widespread use of SAMs for hole-selective layers (HSL), it's remarkable that very few studies have explored electron-selective SAMs.
This study investigates a series of novel molecules for their potential as electron-selective SAMs on ITO. Charge selectivity and transfer rates were assessed using transient surface photovoltage (trSPV) across timescales ranging from 1 nanosecond to 1 second. The results demonstrate clear electron selectivity for certain molecular structures, indicating their strong electron injection capability into ITO and excellent hole-blocking properties.
This study highlights novel molecules with potential for efficient electron-selective SAMs, offering improved performance in perovskite solar cells.
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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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