Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Many different types of dye-sensitized solar cells (DSSCs) have emerged during the past years. Liquid redox electrolyte DSSCs continue to be very interesting due to the large number of dyes and electrolytes, allowing continuous improvement. In liquid electrolyte DSSCs, the large term stability is compromised due to leakage of solvent and air or water infiltration.Several strategies to solve this problem have been explored, for example, the use of polymers to create quasi-solid electrolytes1,2 and the use of solvent free electrolytes (ionic liquids)4. We are exploring the use of these alternative electrolytes in combination with well-known efficient organic dyes such as D35,3 which is environmentally friendly and suitable for large scale manufacturing. The development of these types of DSSCs requires the understanding of the influence that different components in the electrolyte have on the electron transfer (ET) kinetics within the device. By means of ns- transient absorption spectroscopy, we are studying the effect of the ionic size and structure on the recombination kinetics between the TiO2 and D35; for this we have selected 1-Butyl-3-methylimidazolium ionic liquids with I-, Cl-, SCN- and PF6- as anions . It is also interesting to understand how the components in gel-based electrolytes affect the recombination kinetics, for this, we have selected polyacrylonitrile (PAN) as gelator agent with quaternary ammonium salts and ethylene/propylene carbonate as solvents.2
1 Kubo, W.; Murakoshi, K.; Kitamura, T.; Yoshida, S.; Haruki, M.; Hanabusa, K.; Shirai, H;Wada, Y; Yanagida, S. Quasi-Solid-State Dye-Sensitized TiO2 Solar Cells: Effective Charge Transport in Mesoporous Space Filled with Gel Electrolytes Containing Iodide and Iodine. J. Phys. Chem. B 2001, 105, 12809-12815. 2 Bandaram, T.; Jayasundara, W.; Dissanayake, M.; Furlani, M.; Albinsson, I., Mellander, B. Effect of cation size on the performance of dye sensitized nanocrystalline TiO2 solar cells based on quasi-solid state PAN electrolytes containing quaternary ammonium iodides. Electrochemical Acta 2013, 109, 609-616. 3 Hagberg, D.; Jiang, X.; Gabrielsson, E.; Linder, M.; Marinado, T.; Brinck, T.; Hagfeldt.; Sun, L. Symmetric and unsymmetric donor functionalization. Comparing structural and spectral benefits of chromophores for dye-sensitized solar cells. J. Mater. Chem 2009, 19, 7232-7238. 4-Zakeeruddin, S.; Grätzel, M. Solvent-Free Ionic Liquid Electrolytes for Mesoscopic Dye-Sensitized Solar Cells. Adv. Funct. Mater. 2009, 19, 2187-2202
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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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