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Dyes based on the system: D/A-acetylene linker-phenothiazine for developing efficient dye-sensitized solar cells

Abstract

Two novel sensitizers 2a and 2b of D/A-π-D-π-A architecture based on phenothiazine framework connected via ethylene with 3,5-bis(trifluoromethyl)phenyl (A) and (p-methoxyphenyl) (D), and with a cyanoacrylic acid as an anchoring group (A) were designed and synthesized. A comparative analysis was performed to investigate the effect of the electronic character of end-capped D and A groups in 2a and 2b on their photophysical properties and photovoltaic performance. Optical, thermal, electrochemical and photovoltaic properties of 2a and 2b dyes were thoroughly investigated and confronted widely with DFT and TD-DFT calculations. Compound 2b of D-π-D-π-A type showed better photovoltaic parameters which verify the general trends, although the parameters for compound 2a of A-π-D-π-A type do not differ significantly from those for 2b. The metal-free 2a and 2b-based DSSC device exhibited a higher power conversion efficiency of 6.11% (2a) and 5.03% (2b) compared to 3.56% for the N719-based device.

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Publication details

The article was received on 31 Mar 2019, accepted on 12 Apr 2019 and first published on 15 Apr 2019


Article type: Paper
DOI: 10.1039/C9TC01727E
Citation: J. Mater. Chem. C, 2019, Accepted Manuscript

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    Dyes based on the system: D/A-acetylene linker-phenothiazine for developing efficient dye-sensitized solar cells

    A. Slodek, D. Zych, S. Golba, S. Zimosz, P. Gnida and E. Schab-Balcerzak, J. Mater. Chem. C, 2019, Accepted Manuscript , DOI: 10.1039/C9TC01727E

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