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Issue 10, 2017
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Synthesis and application of stilbenoid phenothiazine dendrimers as additives for dye-sensitized solar cells

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Abstract

Stilbenoid dendrimers with phenothiazine as a surface group were synthesized in good yields by the Heck and Horner–Wadsworth–Emmons coupling reaction and characterized by spectral and analytical data. Various core units such as trimethylbenzene, pyridine, and triphenylamine with phenothiazine as the surface unit were employed for the synthesis of dendrimers. The photophysical properties of the dendrimers reveal that as the generation increases the light absorption ability also increases. Furthermore, as the generation increases the absorption maxima show a hypsochromic shift for the n–π* transition and a bathochromic shift for the π–π* transition. However, the fluorescence emission in general increases as the dendrimer generation increases. When the synthesized stilbenoid dendrimers are utilized as an additive in the redox couple (I/I3) of a Dye Sensitized Solar Cell (DSSC), the solar energy conversion efficiency increases with an increase in generation and reaches a maximum of 7.3% with the higher generation dendrimer 10.

Graphical abstract: Synthesis and application of stilbenoid phenothiazine dendrimers as additives for dye-sensitized solar cells

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Publication details

The article was received on 25 May 2017, accepted on 24 Jul 2017 and first published on 25 Jul 2017


Article type: Research Article
DOI: 10.1039/C7QM00238F
Citation: Mater. Chem. Front., 2017,1, 2117-2124
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    Synthesis and application of stilbenoid phenothiazine dendrimers as additives for dye-sensitized solar cells

    M. Ravivarma, C. Satheeshkumar, S. Ganesan and P. Rajakumar, Mater. Chem. Front., 2017, 1, 2117
    DOI: 10.1039/C7QM00238F

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