中文摘要：

为提高聚合物太阳能电池的能量转换效率,将聚乙二醇（PEG）掺入PEDOT∶PSS阳极缓冲层,研究了阳极缓冲层修饰对聚合物太阳能电池性能的影响。首先研究了聚乙二醇对PEDOT∶PSS薄膜电导率的影响,发现PEG会与PEDOT和PSS相互作用,使得PEDOT链重新排布,有利于电荷载流子的传输,从而显著改善了PEDOT∶PSS薄膜的电导率,当PEDOT∶PSS中掺入体积分数为2%~4%的PEG时,可得到较大的电导率。然后,以PEG修饰的PEDOT∶PSS薄膜作为阳极缓冲层制备了聚合物太阳能电池,研究了PEG的掺入对聚合物太阳能电池性能的影响。实验发现,PEG改善的PEDOT∶PSS电导率有利于提高电池的短路电流密度和填充因子,从而改善了器件光伏性能。当PEDOT∶PSS中掺入体积分数为2%的PEG时,聚合物太阳能电池的能量转换效率最高,比未掺杂的器件提高了24.4%。

英文摘要：

In order to improve the performance of polymer solar cells, polyethylene glycol （PEG） was incorporated into PEDOT：PSS layer, and the effect of anode buffer layer modification on the performance of polymer solar cells was studied. First, the effect of PEG on the conductivity of PEDOT：PSS films was studied, and the results show that PEG interacts with PEDOT and PSS, and reorients the PEDOT polymer chains, which improves the conductivity of PEDOT：PSS layer significantly. PEDOT：PSS layer with 2%-4%（volume fraction） PEG has the optimized conductivity. Then the bulk heterojunction polymer solar cells based on PEG modified PEDOT：PSS anode buffer layer were prepared. It is found that PEG improves the short-circuit current density and fill factor obviously. The polymer solar cell with 2% PEG modified PEDOT：PSS layer gives the maximum power conversion efficiency, as compared with the control device without PEG, 24.4% efficiency enhancement is achieved.