D-pi-A Dye System Containing Cyano-Benzoic Acid as Anchoring Group for Dye-Sensitized Solar Cells
Katono, Masataka; Bessho, Takeru; Meng, Sheng; Humphry-Baker, Robin; Rothenberger, Guido; Zakeeruddin, Shaik M.; Kaxiras, Efthimios; Graetzel, Michael
2011

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Abstract

A D-pi-A dye (KM-1) incorporating cyanobenzoic acid as a new acceptor/anchoring group has been synthesized for dye-sensitized solar cells (DSCs) with a high molar extinction coefficient of 66 700 M-1 cm(-1) at 437 nm. Theoretical calculations show that the hydrogen bond between -CN and surface hydroxyl leads to the most stable configuration on the surface of TiO2. In addition, the adsorption of the dye on TiO2 follows a Brunauer-Emmett-Teller (BET) isotherm. Multilayer adsorption of KM-1 on TiO2 seems to take place particularly at higher dye concentrations. DSC device using KM-1 reached a maximum incident photon-to-current conversion efficiency (IPCE) of 84%, with a solar to electric power conversion efficiency (PCE) of 3.3% at AM1.5 G illumination (100 mW cm(-2)). This new type of anchoring group paves a way to light harvesting with strong binding to the metal oxide surface. design new dyes that combine good visible

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Title D-pi-A Dye System Containing Cyano-Benzoic Acid as Anchoring Group for Dye-Sensitized Solar Cells
Author(s) Katono, Masataka ; Bessho, Takeru ; Meng, Sheng ; Humphry-Baker, Robin ; Rothenberger, Guido ; Zakeeruddin, Shaik M. ; Kaxiras, Efthimios ; Graetzel, Michael
Published in Langmuir
Volume 27
Pages 14248-14252
Date 2011
Publisher American Chemical Society
ISSN 0743-7463
Keywords
DOI https://doi.org/10.1021/la203104v
Other identifier(s) View record in Web of Science
Laboratories LPI
Record Appears in Scientific production and competences > SB - School of Basic Sciences > ISIC - Institute of Chemical Sciences and Engineering > LPI - Laboratory of Photonics and Interfaces
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Record creation date 2012-01-13

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