Synthesis and Characterization of Multilayer Films of Dendrimer- Assembled C60 Materials on Nanocrystalline TiO2 Electrodes
Keywords:
Modified electrodes, fullerene C60, dendrimers, TiO2, silanized, photovoltaic cellsAbstract
Abstract: Nanocrystalline TiO2 electrodes were silanized and further modified with C60 fullerene films linked by StarburstTM (PAMAM G0.0) dendrimers of poly(amidoamine), generation 0.0, using a layerby-layer technique into either branched dendritic or linear structures. The resulting films provide organized nanoassembled photoactive surfaces that adsorb in the visible region and offer a high molar extinction coefficient. The linear nanocomposite structure in particular increases the photocurrent efficiency of the polycrystalline TiO2 and decreases the recombination effect, yielding a global collection efficiency of 0.14%.
Resumen: Electrodos nanocristalinos semiconductores de TiO2 fueron silanizados y modificados con películas de fulereno C60 y dendrímeros de poli(amidoamina) generación 0.0 (PAMAM G0.0), usando la técnica de capa-por-capa en una secuencia dendrítica y lineal. Las películas resultantes proporcionan superficies nanoensambladas fotoactivas organizadas que, además de absorber en la región visible, presentan altos coeficientes de extinción molar. En particular, la organización lineal incrementó la eficiencia de fotocorriente del TiO2 policristalino minimizando el efecto de recombinación, con lo que se alcanzó una eficiencia de colección global del 0.14%.
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