Conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) has been widely used as a transparent electrode in organic optoelectronics. Patterning of PEDOT:PSS is needed when used in these devices to avoid or alleviate shunt current. In this work, we present a method of patterning PEDOT:PSS films via a two-step process of laser ablation (nanosecond laser, 1064 nm) and acid treatment (phosphoric acid). The PEDOT can be easily removed by the laser ablation, but PSS is not. This is due to the difference of their absorbance. PEDOT has strong absorption at the wavelength of 1064 nm, but PSS is transparent there. The excess insulator PSS residue hinders electron collection in solar cell devices. Acid treatment can efficiently reduce the PSS residue that is confirmed by X-ray photoelectron spectroscopy (XPS) and optical microscope. With the two-step etching process, solar cells with patterned PEDOT:PSS bottom electrode show high fill factor of 69% and power conversion efficiency of 12.4%.

导电聚合物聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）已被广泛用作有机光电子学中的透明电极。当在这些器件中使用PEDOT：PSS时，需要进行图形化处理，以避免或减轻并联电流。在这项工作中，我们提出了一种通过激光烧蚀（纳秒激光，1064 nm）和酸处理（磷酸）两步工艺对PEDOT：PSS膜进行构图的方法。PEDOT可以很容易地通过激光烧蚀去除，但PSS不能。这是由于它们的吸光度不同。PEDOT在1064 nm波长处具有很强的吸收性，但PSS在此是透明的。多余的绝缘体PSS残留物会阻碍太阳能电池设备中的电子收集。通过X射线光电子能谱（XPS）和光学显微镜确认，酸处理可以有效减少PSS残留。通过两步蚀刻工艺，具有图案化PEDOT：PSS底部电极的太阳能电池显示出69％的高填充率和12.4％的功率转换效率。