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Co-sensitization of ZnO solar cells by organic dyes
We investigated the co-sensitization properties of organic dyes with complementary absorption spectra. Binary and ternary blends of organic dye molecules were used to sensitize nanostructured ZnO Dye-Sensitized Solar Cell (DSSC) devices. It was observed that the co-sensitization process can be optimized in order to increase device performance considerably. Sequential co-sensitization was used in order to enhance the performance of the DSSCs compared to co-sensitization using dye blends. In the case of sequential sensitization, the order of sensitization was found to play a significant role in increasing the efficiency of the device by enhancing the incident photon-to-current efficiency (IPCE) and dye loading of the device. The energy conversion efficiency (n) of co-sensitized ZnO cells was found to be considerably higher than the efficiency of cells sensitized with a single dye, due to the broader absorption spectrum of the co-sensitized cells, as confirmed by incident photon-to-current efficiency (IPCE) measurements. An increase in efficiency of up to 53% was noted for the most successful ternary blend as compared with the most efficient of the single dyes used in the blend. Sequential co-sensitization of DSSCs yielded even higher efficiency values. DSSCs sensitized sequentially had efficiency over 4 times greater than those of the cells sensitized with any of the single dyes, mainly due to optimized light harvesting and improved dye loading.
Co-sensitization of ZnO solar cells by organic dyes
We investigated the co-sensitization properties of organic dyes with complementary absorption spectra. Binary and ternary blends of organic dye molecules were used to sensitize nanostructured ZnO Dye-Sensitized Solar Cell (DSSC) devices. It was observed that the co-sensitization process can be optimized in order to increase device performance considerably. Sequential co-sensitization was used in order to enhance the performance of the DSSCs compared to co-sensitization using dye blends. In the case of sequential sensitization, the order of sensitization was found to play a significant role in increasing the efficiency of the device by enhancing the incident photon-to-current efficiency (IPCE) and dye loading of the device. The energy conversion efficiency (n) of co-sensitized ZnO cells was found to be considerably higher than the efficiency of cells sensitized with a single dye, due to the broader absorption spectrum of the co-sensitized cells, as confirmed by incident photon-to-current efficiency (IPCE) measurements. An increase in efficiency of up to 53% was noted for the most successful ternary blend as compared with the most efficient of the single dyes used in the blend. Sequential co-sensitization of DSSCs yielded even higher efficiency values. DSSCs sensitized sequentially had efficiency over 4 times greater than those of the cells sensitized with any of the single dyes, mainly due to optimized light harvesting and improved dye loading.
Co-sensitization of ZnO solar cells by organic dyes
Giannouli, M. (author) / Tziogkidou, G. (author) / Leftheriotis, G. (author)
2017-01-01
11 pages
Article (Journal)
Electronic Resource
English
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