Flexible ITO-free organic solar cells over 10％ by employing drop-coated conductive PEDOT:PSS transparent anodes

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2019,（4）
• 页码范围: 500-505
• 页数: 6页
• 语种: 英文

摘要

Highly conductive poly(3,4-ethylenedioxythiophene):poly(styrene-sulfonic acid) (PEDOT.:PSS) has been explored to fabricate flexible and stretchable conductors.Generally,PEDOT:PSS transparent anodes are prepared by spin-coating method.In this article,we adopt a method by dropping PEDOT:PSS aqueous solution on the PET plastic substrate to fabricate flexible electrodes.Compared with spin coating,drop-coating is simple and cost-effective with large-area fabrications.Through this method,we fabricated highly transparent conductive electrodes and systematically studied their electrical,optical,morphological and mechanical properties.With dimethyl sulfoxide/methanesulfonic acid (DMSO/MSA) treated PEDOT:PSS electrode,bendable devices based on non-fullerene system displayed an open-circuit voltage of 0.925 V,a fill factor of 70.74％,and a high power conversion efficiency (PCE) of 10.23％ under 100 mW cm-2 illumination,which retained over 80％ of the initial PCE value after 1000 bending cycles.Based on the findings,drop-coated PEDOT:PSS electrodes exhibited high suitability for the development of large-area and high-efficiency printed solar cell modules in the future.