npj Flexible Electronics ( IF 14.6 ) Pub Date : 2019-05-08 , DOI: 10.1038/s41528-019-0054-4 Devendra Singh , Ran Tao , Gilles Lubineau
Conductive electrodes are major components of flexible optoelectronic devices. However, existing materials are either very conductive but brittle (e.g., ITO [indium tin-oxide]), or non-brittle but less conductive, with an environment-dependent conductivity (e.g., PEDOT:PSS [poly-(3,4 ethylenedioxythiophene): poly (styrene sulfonic acid)]). Here, we propose a new design that simultaneously takes advantage of both the high conductivity of ITO and the high flexibility of PEDOT:PSS. In our design, a PEDOT:PSS interface is inserted between the film substrate and the ITO layer, creating a hybrid layered structure that retains both its high conductivity and high stability, when the film is deformed. The rational behind the creation of this structure, is that PEDOT:PSS, used as an interface between the locally delaminated ITO layer and the substrate, substantially reduces the detrimental effects of cracks on the electrode’s conductivity. These results open the path for a new generation of transparent electrodes in advanced flexible devices.
中文翻译:
协同作用的层状无机-有机混合膜,用于导电,柔性和透明电极
导电电极是柔性光电设备的主要组件。但是,现有材料要么导电性强但很脆(例如ITO [氧化铟锡]),要么不脆但导电性不强,具有与环境有关的导电性(例如PEDOT:PSS [聚-(3,4乙二氧基噻吩) ):聚(苯乙烯磺酸)])。在这里,我们提出了一种新设计,该设计同时利用了ITO的高导电性和PEDOT:PSS的高灵活性。在我们的设计中,将PEDOT:PSS界面插入到薄膜基材和ITO层之间,从而形成了一种混合的分层结构,当薄膜变形时,既保留了其高导电性又保持了高稳定性。创建此结构的基本原理是,PEDOT:PSS用作局部分层的ITO层与基板之间的界面,大大降低了裂纹对电极导电性的不利影响。这些结果为先进的柔性设备中的新一代透明电极开辟了道路。