High Open-Circuit Voltage Solid-State Dye-Sensitized Solar Cells with Organic Dye

Chen, PeterYum, Jun HoDe Angelis, FilippoMosconi, EdoardoFantacci, SimonaMoon, Soo-JinBaker, Robin HumphryKo, JaejungNazeeruddin, Md. K.Graetzel, Michael2010-11-302010-11-302010-11-30200910.1021/nl901246ghttps://infoscience.epfl.ch/handle/20.500.14299/60148WOS:000266969400053Solid-state dye-sensitized solar cells were fabricated using an organic dye, 2-cyanoacrylic acid-4-(bis-dimethylfluoreneaniline)dithiophene (JK2), which exhibits more than 1 V open-circuit potential (V-oc). To scrutinize the origin of high voltage in these cells, transient V-oc decay measurements and density functional theroy calculations of the interacting dye/semiconductor surface were performed. A negative conduction band shift was observed due to the favorable dipolar field exerted by the JK2 sensitizer to the TiO2 surface, at variance with heteroleptic Ru(II)-dyes for which an opposite dipole effect was found, providing an increased V-oc.Density-Functional TheoryMolecular-DynamicsTio2 NanoparticlesElectronic-PropertiesRecombinationCoadsorbentPerformanceFabricationMonolayersDevicesHigh Open-Circuit Voltage Solid-State Dye-Sensitized Solar Cells with Organic Dyetext::journal::journal article::research article