Abstract
A new approach for the large-scale production of flexible photoelectrodes for dye-sensitized solar cells (DSSCs) is presented by roll-to-roll coating of a titanium dioxide nanodispersion containing the block copolymer ‘Pluronic®’ (PEOx-PPOy-PEOx, PEO: poly(ethylene oxide), PPO: poly(propylene oxide)). Functional DSSCs were assembled and the different coating procedures compared with respect to their solar power conversion efficiency. It is shown that the binder ‘Pluronic’ can be removed at processing temperatures as low as 140 °C, thus aiding achievement of sufficient adhesion to the ITO-PET support, higher porosity of the TiO2 layer and decreased crack appearance. Further optimization of this method is particularly promising when combined with other known low-temperature methods.
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