Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV24)
DOI: https://doi.org/10.29363/nanoge.hopv.2024.086
Publication date: 6th February 2024
In this presentation we will follow the history of spiro-OMeTAD as a high-performance solid-state charge-transfer material which was central to the development of solid-state dye-sensitized solar cells and perovskite solar cells. The original objective was to replace the liquid, corrosive iodide-based electrolyte in dye-sensitized solar cells with a more benign solid material. Spiro-linked solid-state hole transport materials were originally developed for their application in OLEDs. Spiro-OMeTAD was a slightly modified version of the original molecules and featured eight methoxy-groups, following the rational that these groups would help to shift the energy levels to facilitate efficient hole-transfer from a photooxidised dye. Doping through partial oxidation and blending with lithium salts and pyridine derivatives further helped to boost the performance of these materials. In 2012 the use of spiro-OMeTAD enabled the fabrication of the first solid-state perovskite solar cells, overcoming stability and performance limitations of the photoelectrochemical perovskite solar cells used hitherto. Twelve years later spiro-OMeTAD still remains the most-commonly used hole transport material in perovskite solar cells.
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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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