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Characterization of metal free D- (-A)2 organic dye and its application as co-sensitizer along with N719 dye for efficient dye sensitized solar cells


Reference:

Singh, M., Kurchania, R., Pockett, A., Ball, R., Koukaras, E., Cameron, P. and Sharma, G. D., 2015. Characterization of metal free D- (-A)2 organic dye and its application as co-sensitizer along with N719 dye for efficient dye sensitized solar cells. Indian Journal of Physics

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    Official URL:

    http://dx.doi.org/10.1007/s12648-015-0681-0

    Abstract

    The optical, electrochemical and density functional theory molecular simulation of a metal free D-(-A)2 i.e. 3,3'-(5,5'-(9-hexyl-9H-carbazole-3,6-diyl)bis(thiophene-5,2-diyl))bis(2-cyanoacrylic acid denoted as D) has been investigated. A step wise cosensitization of D with N719 dye is adopted to enhance the power conversion efficiency of dye sensitized solar cells. The metal free dye possesses strong absorption in the 370-450 nm wavelength range and effectively overcome the competitive light absorption by . The N719/D cosensitized dye sensitized solar cell shows a power conversion efficiency of about 7.24 % which is higher than the dye sensitized solar cells based on either N719 (5.78 %) or D (3.95 %) sensitizers. The improved power conversion efficiency of the co-sensitized dye sensitized solar cell is attributed to the combined enhancement of both short circuit photocurrent and open circuit voltage. The short circuit photocurrent improvement is attributed to the increase in the both light harvesting efficiency of the cosensitized photoanode and charge collection efficiency of the dye sensitized solar cell. However, the open circuit voltage is improved due to better adsorption and surface coverage of TiO2 on cosensitization and an associated reduction in the back electron recombination with increased electron lifetime. These effects are analyzed using electrochemical impedance spectroscopy and dark current voltage measurements of the dye sensitized solar cells.

    Details

    Item Type Articles
    CreatorsSingh, M., Kurchania, R., Pockett, A., Ball, R., Koukaras, E., Cameron, P. and Sharma, G. D.
    DOI10.1007/s12648-015-0681-0
    DepartmentsFaculty of Science > Chemistry
    Faculty of Engineering & Design > Architecture & Civil Engineering
    Research CentresCentre for Sustainable Chemical Technologies
    BRE Centre in Innovative Construction Materials
    Materials Research Centre
    Publisher StatementManjeet_Indian_Journal_of_Physics_2015.pdf: The final publication is available at Springer via http://dx.doi.org/10.1007/s12648-015-0681-0
    RefereedYes
    StatusPublished
    ID Code43897

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