Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
In the last two decades, significant advances in the optimization of DSSCs have been realized. The dye design has been addressed by the majority of the laboratories engaged in this research field and more recently, increasing attention is being paid to the engineering of the photoanode and of the counter electrode material in order to improve the electron collection efficiency and the kinetics of the electron transfer processes involving the electron mediator. In terms of practical exploitation of DSSCs, the use of non corrosive and non volatile electrolytes is of fundamental importance. On this respect, starting from 2001/2002, an increasing number of laboratories focused on new redox shuttles alternative to the I-/I3- . These efforts led to the control or to the complete suppression of the dark current, which correspond to charge recombination between injected electrons and oxidized mediator. The breakthrough was obtained coupling a sterically hindered dye with a mobile shuttle based on a transition metal complex, which allowed to reach on a single device the record efficiency of 12%.
Studies on new redox shuttles coupled to suitable dyes, and on new passivation methods for the photoanodes, in order to inhibit the contact with oxidized mediator, represent a new research front which should allow to beat this efficiency in the near future.
The presentation will focus on recent advances in the design of electron mediators based on Copper(I) complexes, on photoanode passivation with neutral and cationic siloxanes and on the fabrication of catalytic counter electrodes based on modified PEDOT with improved mechanical stability.
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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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