Ruthenium sensitizers based on heteroaromatic conjugated bypiridines for dye-sensitized solar cells

Alessandro Abbotto; Claudia Barolo; Jun-Ho Yum; Luca Bellotto; Filippo De Angelis; Michael Grätzel; Chiara Marinzi; Mohammad K. Nazeeruddin

doi:10.1117/12.783299

16 April 2008 Ruthenium sensitizers based on heteroaromatic conjugated bypiridines for dye-sensitized solar cells

Alessandro Abbotto, Claudia Barolo, Jun-Ho Yum, Luca Bellotto, Filippo De Angelis, Michael Grätzel, Chiara Marinzi, Mohammad K. Nazeeruddin

Author Affiliations +

Proceedings Volume 6999, Organic Optoelectronics and Photonics III; 69990O (2008) https://doi.org/10.1117/12.783299
Event: SPIE Photonics Europe, 2008, Strasbourg, France

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.

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Alessandro Abbotto, Claudia Barolo, Jun-Ho Yum, Luca Bellotto, Filippo De Angelis, Michael Grätzel, Chiara Marinzi, and Mohammad K. Nazeeruddin "Ruthenium sensitizers based on heteroaromatic conjugated bypiridines for dye-sensitized solar cells", Proc. SPIE 6999, Organic Optoelectronics and Photonics III, 69990O (16 April 2008); https://doi.org/10.1117/12.783299

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