Poly(3,4-ethylenedioxythiphene):poly(styrenesulfonate) (PEDOT:PSS) layer as a hole transport layer (HTL) plays a key role in efficient hole extraction and transportation of the inverted planar perovskite solar cells (PSCs). However, the insulating nature of PSS lead to lower electrical property of the PEDOT:PSS film, which impedes transferring hole and results in a low photocurrent of the PSCs. In this work, dimethylformamide (DMF), methanol and their mixture solvents (co-solvent) were employed to treat the PEOT:PSS thin film after deposition with different methods to enhance the film’s electrical conductivity. Electrical conductivity of the PEDOT:PSS films was increased from 10^-3 S.cm^-1 to ∼10² S.cm^-1 after the co-solvents treatment. Using the highest conductivity co-solvent treated PEDOT:PSS thin film as the HTL in a perovskite solar cell, the power conversion efficiency (PCE) of the device has been measured improved by 17.5% as compared with that of the control device with the untreated PEDOT:PSS film as the HTL. This result shows that the hybrid co-solvent post-treatment is a simple and feasible way to modified the electrical properties of the PEDOT:PSS film as the HTL for high efficient PSCs and other thin film electronic and optoelectronic devices.

聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）层作为空穴传输层（HTL）在有效的空穴提取和反向平面钙钛矿太阳能电池（PSC）的传输中起着关键作用。但是，PSS的绝缘性导致PEDOT：PSS膜的电性能降低，从而阻碍了传输空穴并导致PSC的光电流较低。在这项工作中，使用二甲基甲酰胺（DMF），甲醇及其混合溶剂（助溶剂）在沉积后采用不同的方法处理PEOT：PSS薄膜，以提高薄膜的电导率。PEDOT：PSS薄膜的电导率从10 ^-3 S.cm ^-1增加到〜10 ² S.cm ^-1共溶剂处理后。使用最高电导率共溶剂处理的PEDOT：PSS薄膜作为钙钛矿太阳能电池中的HTL，与未处理的对照设备相比，该设备的功率转换效率（PCE）已提高了17.5％。 PEDOT：PSS胶片作为HTL。该结果表明，混合助溶剂后处理是一种简单可行的方法，可将PEDOT：PSS膜的电学性质作为HTL用于高效PSC和其他薄膜电子和光电器件。