Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
In the last 15 years much effort has been devoted to the preparation, optimization and characterization of new materials for DSSCs, in this field the main part of the work has been concentrated on the synthesis of new photo-sensitizers considered as a key point to obtain good performances in this type of devices. Recently a great attention has been dedicated to organic dyes as a possible alternative to ruthenium coordination complexes for several reasons: (1) their cost and environmental impact are significantly reduced compared to organometallic sensitizers; (2) their molar extinction coefficients are usually higher than those of ruthenium complexes, making them attractive for thin film and solid-electrolyte DSSCs and in particular because (3) their electronic properties can be easily modulated by design and synthesis.
Here we present a systematic study on a new family of organic dyes characterized by a common block based on 3,3"'di-octyl-terthiophene (Fig. 1). The results obtained in conventional liquid I2/I3- - based devices, have been correlated to the number of thiophene units and to the number and position of the n-octyl chain. Moreover we report the variation of the efficiencies as a function of the active area size and, in the best conditions, devices with around 9 mm2 of active area generated PCE up to 10%.
Figure 1. Structure of the investigated dyes.
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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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