The synthesis, photophysical and electrochemical characterization, theoretical calculations and photovoltaic studies of a push-pull dye with an unconventional nonplanar tetrathiahelicene π−spacer between the donor-acceptor groups, are reported. The molecule exhibits suitable HOMO LUMO levels to be used in DSSC. The presence of the donor-acceptor helical architecture allows the internal charge transfer and subsequent electron injection to the conduction band of TiO₂ leading to the good photocurrent value of 4.6 mA cm⁻².

中文翻译：

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太阳能电池的非常规螺旋推挽系统

报道了在供体-受体基团之间具有非常规的非平面四硫杂螺旋体π-间隔的推挽式染料的合成，光物理和电化学表征，理论计算和光伏研究。该分子表现出适合在DSSC中使用的HOMO LUMO水平。供体-受体螺旋结构的存在允许内部电荷转移和随后的电子注入到TiO ₂的导带，导致良好的4.6mA cm ^-2的光电流值。