Tuning spectral properties of phenothiazine based donoracceptor dyes for efficient dye-sensitized solar cellsElectronic supplementary information (ESI) available. See DOI: 10.1039/c1jm14024h

Two novel metal-free organic donoracceptor dyes were synthesized using electron-rich 10-butyl-(2-methylthio)-10 H -phenothiazine as a donor and cyanoacrylic acid as an acceptor. The spectral response of the dye was tuned by introducing a vinylene thiophene -bridge. Obtained optical and electrochemic...

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Main Authors: Marszalek, Magdalena, Nagane, Satyawan, Ichake, Amol, Humphry-Baker, Robin, Paul, Vincent, Zakeeruddin, Shaik M, Grtzel, Michael
Format: Article
Language:English
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Summary:Two novel metal-free organic donoracceptor dyes were synthesized using electron-rich 10-butyl-(2-methylthio)-10 H -phenothiazine as a donor and cyanoacrylic acid as an acceptor. The spectral response of the dye was tuned by introducing a vinylene thiophene -bridge. Obtained optical and electrochemical properties of the dyes seemed to be promising in terms of employing them as light harvesters in dye-sensitized solar cells (DSCs). The efficiencies of the devices under standard AM 1.5G (100 mW cm 2 ) conditions reached 7.3% with volatile electrolyte. The differences in the photovoltaic parameters of these DSCs were explained by comparing the results of electrochemical impedance spectroscopy (EIS) measurements and transient photovoltage and photocurrent decay experiments. Metal-free organic donoracceptor dyes for efficient dye-sensitized solar cells using 10-butyl-(2-methylthio)-10 H -phenothiazine as a donor.
ISSN:0959-9428
1364-5501
DOI:10.1039/c1jm14024h