Synthesis and Development of New Electron Transport Mediators for Tandem Dye-Sensitized Solar Cell (DSSC) Applications
Linah Alqahtani a b, Elizabeth Gibson a
a Department of Chemistry, University of Newcastle, Newcastle upon Tyne, NE1 7RU
b Department of Chemistry, Faculty of Science, King Faisal University
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
València, Spain, 2022 May 19th - 25th
Organizers: Pablo Docampo, Eva Unger and Elizabeth Gibson
Poster, Linah Alqahtani, 207
Publication date: 20th April 2022

In recent years, dye-sensitized solar cells (DSSCs) have received much interest as low-cost photovoltaic devices compared to traditional silicon solar cells. The development of these prospective low-cost solar cells focuses on finding efficient dyes and charge-transport materials for tandem DSSCs. Modifying the p-DSSC conversion efficiency would have a major impact on the molecular level performance of solar cells. This work focuses on the organic synthesis, characterization, electrochemical and photophysical properties of a series of compounds comprising a fullerene (C60) as electron transport mediators for application in dye-sensitized solar cells (DSSCs). Much of the previous work in the field has focused on n-type metal oxides and organic hole-transport materials. For solid state p-type DSSCs (and tandem devices) an electron transport mediator is required. We will investigate the possibility of using this approach in p-type DSSCs because of the beneficial influence of the C60 accepting, storing, and transporting electrons. In this work, the fulleropyrrolidines were characterized by UV-Vis, IR spectroscopy, 1H NMR, 13C NMR and HR-Mass Spectrometry. Cyclic voltametric studies reveal that all the derivatives exhibit four reversible redox waves for each compound. The derivatives will test as electron transport mediators in DSSC, and we are predicting to show high efficiency.  

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