For the state-of-the-art organic solar cells (OSCs), PEDOT:PSS is the most popularly used hole transport material for the conventional structure. However, it still suffers from several disadvantages, such as low conductivity and harm to ITO due to the acidic PSS. Herein, a simple method is introduced to enhance the conductivity and remove the additional PSS by water rinsing the PEDOT:PSS films. The photovoltaic devices based on the water rinsed PEDOT:PSS present a dramatic improvement in efficiency from 15.98% to 16.75% in comparison to that of the untreated counterparts. Systematic characterization and analysis reveal that although part of the PEDOT:PSS is washed away, it still leaves a smoother film and the ratio of PEDOT to PSS is higher than before in the remaining films. It can greatly improve the conductivity and reduce the damage to substrates. This study demonstrates that finely modifying the charge transport materials to improve conductivity and reduce defeats has great potential for boosting the efficiency of OSCs.

对于最先进的有机太阳能电池 (OSC)，PEDOT:PSS 是传统结构中最常用的空穴传输材料。然而，它仍然存在一些缺点，例如导电性低以及酸性 PSS 对 ITO 的伤害。在此，介绍了一种通过水冲洗 PEDOT:PSS 薄膜来提高电导率和去除额外 PSS 的简单方法。与未经处理的对应物相比，基于水洗 PEDOT:PSS 的光伏器件的效率从 15.98% 显着提高到 16.75%。系统的表征和分析表明，虽然部分 PEDOT:PSS 被洗掉了，但它仍然留下了更光滑的薄膜，并且在剩余的薄膜中 PEDOT 与 PSS 的比例比以前更高。可大大提高导电性，减少对基材的损伤。这项研究表明，对电荷传输材料进行精细改性以提高导电性和减少失效具有提高 OSC 效率的巨大潜力。