摘要:
研究了掺杂后poly（3,4-ethylene dioxythiophene）：poly（styrenesulphonic acid）（PEDOT∶PSS）电导率的变化以及掺杂PEDOT∶PSS薄膜对聚合物太阳能电池器件性能的影响.实验发现,向PEDOT∶PSS中掺入极性溶剂二甲基亚砜（DMSO）明显提高了薄膜的电导率,掺杂后的电导率最大值达到1.25S/cm,比未掺杂时提高了3个数量级.将掺杂的PEDOT∶PSS薄膜作为缓冲层应用于聚合物电池（ITO/PEDOT∶PSS/P3HT∶PCBM/LiF/Al）中,发现高电导率的PEDOT∶PSS降低了器件的串联电阻,增加了器件的短路电流,从而提高了器件的性能.最好的聚合物太阳能电池在100mW/cm2的光照下,开路电压（Voc）为0.63V,短路电流密度（Jsc）为11.09mA·cm-2,填充因子（FF）为63.7%,能量转换效率（η）达到4.45%.
Abstract:
In this paper,we investigate the doping effect on conductivity of poly（3,4-ethylene dioxythiophene）：poly （styrenesulphonic acid）（PEDOT∶PSS）and its influence on performance of polymer solar cell.The experiment demonstrates that the conductivity of PEDOT∶PSS is improved obviously by doping polar solvent dimethyl sulfoxide （DMSO）.The maximum of the conductivity is 1.25 S/cm when the doping concentration reaches 10 wt%,which increases about three orders of magnitude compared with the undoped.Based on doped PEDOT∶PSS used as an anode buffer layer,the polymer solar cell （ITO/PEDOT∶PSS/P3HT：PCBM/LiF/Al） shows an improvement of hole charge transport as well as an increase of short-circuit current density and a reduction of series resistance,owing to the higher conductivity of the doped PEDOT∶PSS.Consequently,it improves the whole performance of polymer solar cell.The short-circuit current density （Jsc） of 11.09 mA·cm-2,the open circuit voltage （Voc） of 0.63 V,and the fill factor （FF） of 63.7% are obtained under 100 mW/cm2 air-mass solar simulator illumination,yielding a 4.45% power conversion efficiency （η）.
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