Abstract
Soluble thiophene-based copolymers, poly[(3-alkylthiophene)-co-(3-thiophene acetic acid)]s (P3AT-co-3TAA-n's), were synthesized to apply to the polymer sensitizer of the polymer-sensitized solar cell devices. In order to improve the solubility and the chemical adsorption onto nanoporous TiO2 layers in the polymer-sensitized solar cell devices, thiophene-based copolymers having the chemical structures of the carboxyl group and the alkyl group were designed. We have fabricated solid-state polymer-sensitized solar cell devices using polymer sensitizers and polymer electrolytes, and investigated on the photovoltaic performances. In the polymer-sensitized solar cell devices using polymer sensitizers, Voc is 0.37–0.46 V, Jsc is 0.82–7.71 mA/cm2, and the power conversion efficiency is 0.14–0.38%, respectively.
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