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Co-sensitization Promoted Light Harvesting for Dye-Sensitized Solar Cells

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Abstract

Co-sensitization of two sensitizers on core/shell TiO2–Nb2O5 with Ta2O5 scattering layer photoanode arranged in different sequences are investigated for application to dye sensitized solar cells (DSSCs). The co-sensitization of N719/Coumarin and CdS–CdSe quantum dots/Coumarin exhibited enhanced photovoltaic performances for the pertinent cells compared with the cell made from corresponding individual sensitizers. In the present investigation, co-sensitization by N719/Coumarin showed better photovoltaic performance and have the power conversion efficiency (PCE) of 9.9 % while the performances of cells with the individual sensitizers are 8.2 % (N719) and 6.9 % (Coumarin) respectively. The PCE of DSSC with CdS–CdSe/Coumarin co-sensitization is found to be 8.7 % whereas the performances of DSSCs with the individual sensitizers are 4.5 % (CdS–CdSe) and 6.9 % (Coumarin) respectively. These results indicated that the co-sensitization of sensitizers promoted the light harvesting efficiency of DSSCs as compared the cells with the consequent individual sensitizers.

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Acknowledgments

The authors are thankful to the authorities of Annamalai University, for providing all necessary facilities to carried out the present work successfully. We also thank the anonymous referees who significantly contributed to improving the contents of the manuscript.

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Authors and Affiliations

  1. Research and Development Centre, Bharathiar University, Coimbatore, 641046, Tamil Nadu, India

    R. Elangovan

  2. Department of Physics (DDE), Annamalai University, Annamalai Nagar, 608002, Tamil Nadu, India

    P. Venkatachalam

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  1. R. Elangovan
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  2. P. Venkatachalam
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Correspondence to P. Venkatachalam.

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Elangovan, R., Venkatachalam, P. Co-sensitization Promoted Light Harvesting for Dye-Sensitized Solar Cells. J Inorg Organomet Polym 25, 823–831 (2015). https://doi.org/10.1007/s10904-015-0165-x

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  • DOI: https://doi.org/10.1007/s10904-015-0165-x

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