Issue 3, 2012
From the journal:

Journal of Materials Chemistry

Tuning spectral properties of phenothiazine based donor–π–acceptor dyes for efficient dye-sensitized solar cells†

Magdalena Marszalek,a   Satyawan Nagane,b   Amol Ichake,b   Robin Humphry-Baker,a   Vincent Paul,*b   Shaik M. Zakeeruddin*a  and  Michael Grätzel*a  

* Corresponding authors

a Laboratory for Photonics and Interfaces, EcolePolytechniqueFédérale de Lausanne, Lausanne, Switzerland
E-mail: shaik.zakeer@epfl.ch, michael.graetzel@epfl.ch
Fax: +41 (0)21 693 61 00
Tel: +41(0)21 693 31 12

b Organic Chemistry Division, National Chemical Laboratory, Room 288, Pashan Road, Pune, India
E-mail: vp.swamy@ncl.res.in
Fax: +91 (0)20 2590 2629
Tel: +91 (0)20 2590 2286

Abstract

Two novel metal-free organic donor–π–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 π-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.

Graphical abstract: Tuning spectral properties of phenothiazine based donor–π–acceptor dyes for efficient dye-sensitized solar cells

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Article information

DOI
https://doi.org/10.1039/C1JM14024H
Article type
Paper
Submitted
18 Aug 2011
Accepted
12 Oct 2011
First published
14 Nov 2011

J. Mater. Chem., 2012,22, 889-894

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Tuning spectral properties of phenothiazine based donor–π–acceptor dyes for efficient dye-sensitized solar cells

M. Marszalek, S. Nagane, A. Ichake, R. Humphry-Baker, V. Paul, S. M. Zakeeruddin and M. Grätzel, J. Mater. Chem., 2012, 22, 889 DOI: 10.1039/C1JM14024H

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