Synthesis of regioregular side-chain conjugated polythiophene and its application in photovoltaic solar cells

A new type of polythiophene derivatives, regioregular side-chain conjugated polythiophene (rr-PsccPH), was synthesized. The absorption spectrum of the rr-PsccPH film was red-shifted by ca. 80 nm in comparison with that of poly (3-arylthiophene). The photovoltaic cells based on the blend of the polymer and C60 were fabricated and characterized. Energy conversion efficiency of the photovoltaic cell under a white light (70 mW/cm2) was 0.54%, when the weight ratio of the polymer to C60, equals to 1:2.