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Proceedings Paper

Ruthenium sensitizers based on heteroaromatic conjugated bypiridines for dye-sensitized solar cells
Author(s): Alessandro Abbotto; Claudia Barolo; Jun-Ho Yum; Luca Bellotto; Filippo De Angelis; Michael Grätzel; Chiara Marinzi; Mohammad K. Nazeeruddin
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Paper Abstract

A new ruthenium sensitizer based on a heteroaromatic-4,4'-π-conjugated 2,2'-bipyridine, bearing conjugated π-excessive heteroaromatic rings as donors is presented. Dye-sensitized solar cells have been fabricated based on the novel ruthenium complex [Ru(II)LL'(NCS)2] (L = 4,4'-bis[(E)-2-(3,4-ethylenedioxythien-2-yl)vinyl]-2,2'-bipyridine, L' = 4,4'- (dicarboxylic acid)-2,2'-bipyridine) and their photoelectrochemical properties have been measured under various conditions. Using this sensitizer photovoltaic efficiencies up to 9.1 % under standard global AM 1.5 sunlight were obtained. DFT/TDDFT calculations have been performed for the sensitizer in solution. By calculating the excited states energy and character and comparing the results with the conduction band edge of a model TiO2 nanoparticle, we were able to highlight the factors affecting the measured photovoltaic efficiencies.

Paper Details

Date Published: 16 April 2008
PDF: 9 pages
Proc. SPIE 6999, Organic Optoelectronics and Photonics III, 69990O (16 April 2008); doi: 10.1117/12.783299
Show Author Affiliations
Alessandro Abbotto, Univ. of Milano-Bicocca (Italy)
Claudia Barolo, Swiss Federal Institute of Technology (Switzerland)
Jun-Ho Yum, Swiss Federal Institute of Technology (Switzerland)
Luca Bellotto, Univ. of Milano-Bicocca (Italy)
Filippo De Angelis, Istituto CNR di Scienze e Tecnologie Molecolari, Univ. of Perugia (Italy)
Michael Grätzel, Swiss Federal Institute of Technology (Switzerland)
Chiara Marinzi, Univ. of Milano-Bicocca (Italy)
Mohammad K. Nazeeruddin, Swiss Federal Institute of Technology (Switzerland)

Published in SPIE Proceedings Vol. 6999:
Organic Optoelectronics and Photonics III
Paul L. Heremans; Michele Muccini; Eric A. Meulenkamp, Editor(s)

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