Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/101063
Title: A selective co-sensitization approach to increase photon conversion efficiency and electron lifetime in dye-sensitized solar cells
Authors: Nguyen, Loc H.
Mulmudi, Hemant K.
Sabba, Dharani
Kulkarni, Sneha A.
Batabyal, Sudip Kumar
Nonomura, Kazuteru
Grätzel, Michael
Mhaisalkar, Subodh Gautam
Issue Date: 2012
Source: Nguyen, L. H., Mulmudi, H. K., Sabba, D., Kulkarni, S. A., Batabyal, S. K., Nonomura, K., et al. (2012). A selective co-sensitization approach to increase photon conversion efficiency and electron lifetime in dye-sensitized solar cells. Physical Chemistry Chemical Physics, 14(47), 16182-16186.
Series/Report no.: Physical chemistry chemical physics
Abstract: Ruthenium-based C106 and organic D131 sensitizers have been judicially chosen for co-sensitization due to their complementary absorption properties and different molecular sizes. Co-sensitization yields a higher light-harvesting efficiency as well as better dye coverage to passivate the surface of TiO2. The co-sensitized devices C106 + D131 showed significant enhancement in the performance (η = 11.1%), which is a marked improvement over baseline devices sensitized with either D131 (η = 5.6%) or C106 (η = 9.5%). The improved performance of the co-sensitized cell is attributed to the combined enhancement in the short circuit current, open circuit voltage, and the fill-factor of the solar cells. Jsc is improved because of the complementary absorption spectra and favorable energy level alignments of both dyes; whereas, Voc is improved because of the better surface coverage helping to reduce the recombination and increase the electron life time. The origins of these enhancements have been systematically studied through dye desorption, absorption spectroscopy, and intensity modulated photovoltage spectroscopy investigations.
URI: https://hdl.handle.net/10356/101063
http://hdl.handle.net/10220/11061
DOI: 10.1039/C2CP42959D
Rights: © The Owner Societies.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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