Title
Organic dyes containing 2-(1,1-dicyanomethylene)rhodanine as an efficient electron acceptor and anchoring unit for Dye-Sensitized Solar Cells
Publication Date
3-20-2014
Document Type
Article
Abstract
Here we report the synthesis and characterization of five new organic dyes based on 2-(1,1-dicyanomethylene)rhodanine, which simultaneously serves as an efficient electron-acceptor moiety and anchoring unit to the TiO2. Triphenylamine was used as the electron donor and a vinylthiophene unit was introduced to increase the pi-conjugation of the system and to widen the absorption region. The dye containing two 2-(1,1-dicyanomethylene)rhodanine units and no thiophene units showed the best photovoltaic performance with a short-circuit photocurrent density of 7.76 mA/cm², an open circuit photovoltage of 0.62 V, and a fill factor of 0.68, corresponding to an overall conversion efficiency of 3.78% under AM 1.5 irradiation (100 mW/cm²).
Comments
Echeverry CA, Insuasty A, Herranz MÁ, Ortíz A, Cotta R, Dhas V, Echegoyen L, Insuasty B, Martín N. Organic dyes containing 2-(1,1-dicyanomethylene)rhodanine as an efficient electron acceptor and anchoring unit for dye-sensitized solar cells. Dyes and Pigments 2014 August 2014;107:9-14.