【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%。更多还原

【Abstract】 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.更多还原