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
Abbotto, A., Barolo, C., Yum, J., Bellotto, L., De Angelis, F., Grätzel, M., et al. (2008). Ruthenium sensitizers based on heteroaromatic conjugated bipyridines for dye-sensitized solar cells. In Conference on Organic Optoelectronics and Photonics III (pp.69990O-1-69990O-9). SPIE [10.1117/12.783299].
Ruthenium sensitizers based on heteroaromatic conjugated bipyridines for dye-sensitized solar cells
ABBOTTO, ALESSANDRO
;
2008
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
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
