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The Role of Mineral Acid Doping of PEDOT:PSS and Its Application in Organic Photovoltaics
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2019-11-18 , DOI: 10.1002/aelm.201900648 Lin Zhang 1 , Ke Yang 1 , Rui Chen 1 , Yongli Zhou 1 , Shanshan Chen 1 , Yujie Zheng 1 , Meng Li 1 , Chaohe Xu 2 , Xiaosheng Tang 3 , Zhigang Zang 3 , Kuan Sun 1
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2019-11-18 , DOI: 10.1002/aelm.201900648 Lin Zhang 1 , Ke Yang 1 , Rui Chen 1 , Yongli Zhou 1 , Shanshan Chen 1 , Yujie Zheng 1 , Meng Li 1 , Chaohe Xu 2 , Xiaosheng Tang 3 , Zhigang Zang 3 , Kuan Sun 1
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Poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is one of the most successful conducting polymers in terms of commercialization. A method to readily obtain highly conductive and transparent PEDOT:PSS films is urgently needed. A simple method is introduced to enhance the conductivity of such films dramatically. By adding a series of mineral acids into the PEDOT:PSS aqueous solution directly, the conductivity is enhanced by 3–4 orders of magnitude. Mechanistic study reveals that the conductivity enhancement is dependent on boiling point, pKa value, softness parameter, and oxidability of the dopant acid. Specifically, acids with high boiling point, low pKa, and low softness parameter are able to induce phase separation between PEDOT and PSS, leading to secondary doping. If the dopant acid exhibits strong oxidability, the conductivity can also be enhanced via primary doping. H2SO4‐doped PEDOT:PSS films exhibit the highest conductivity of 2244 S cm−1. These films are employed as the transparent electrodes of poly(3‐hexylthiophene‐2,5‐diyl) (P3HT)‐based organic photovoltaic cells, and the power conversation efficiency reaches 3.13%. These results suggest direct acid doping of PEDOT:PSS solution is a facile approach to obtain highly flexible transparent electrodes.
中文翻译：
PEDOT：PSS的无机酸掺杂作用及其在有机光伏中的应用
聚（3,4-乙二氧基噻吩）：聚苯乙烯磺酸盐（PEDOT：PSS）是最商业化的导电聚合物之一。迫切需要一种容易获得高导电性和透明性的PEDOT：PSS薄膜的方法。引入了一种简单的方法来显着提高此类薄膜的电导率。通过将一系列无机酸直接添加到PEDOT：PSS水溶液中，电导率提高了3-4个数量级。机理研究表明，导电性增强是依赖于沸腾点，p ķ一个值，柔软性参数，和掺杂剂酸的氧化性。具体而言，高沸点，低p K a的酸和低的软度参数能够引起PEDOT和PSS之间的相分离，从而导致二次掺杂。如果掺杂剂酸表现出强的氧化性，则还可以通过初次掺杂来提高电导率。掺杂H 2 SO 4的PEDOT：PSS薄膜的电导率最高，为2244 S cm -1。这些薄膜用作基于聚（3-己基噻吩-2,5-二基）（P3HT）的有机光伏电池的透明电极，功率转换效率达到3.13％。这些结果表明，直接酸掺杂PEDOT：PSS溶液是获得高度柔性的透明电极的简便方法。
更新日期：2020-01-13
中文翻译：
PEDOT：PSS的无机酸掺杂作用及其在有机光伏中的应用
聚（3,4-乙二氧基噻吩）：聚苯乙烯磺酸盐（PEDOT：PSS）是最商业化的导电聚合物之一。迫切需要一种容易获得高导电性和透明性的PEDOT：PSS薄膜的方法。引入了一种简单的方法来显着提高此类薄膜的电导率。通过将一系列无机酸直接添加到PEDOT：PSS水溶液中，电导率提高了3-4个数量级。机理研究表明，导电性增强是依赖于沸腾点，p ķ一个值，柔软性参数，和掺杂剂酸的氧化性。具体而言，高沸点，低p K a的酸和低的软度参数能够引起PEDOT和PSS之间的相分离，从而导致二次掺杂。如果掺杂剂酸表现出强的氧化性，则还可以通过初次掺杂来提高电导率。掺杂H 2 SO 4的PEDOT：PSS薄膜的电导率最高，为2244 S cm -1。这些薄膜用作基于聚（3-己基噻吩-2,5-二基）（P3HT）的有机光伏电池的透明电极，功率转换效率达到3.13％。这些结果表明，直接酸掺杂PEDOT：PSS溶液是获得高度柔性的透明电极的简便方法。
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