Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 22, Issue 3, Pages 889-894Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1jm14024h
Keywords
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Funding
- Swiss National Science Foundation
- Department of Science & Technology, New Delhi [INT/SWISS/P-33/2009]
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Two novel metal-free organic donor-pi-acceptor dyes were synthesized using electron-rich 10-butyl-(2-methylthio)-10H-phenothiazine as a donor and cyanoacrylic acid as an acceptor. The spectral response of the dye was tuned by introducing a vinylene thiophene pi-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.
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