Printable Silver Nanowire and PEDOT:PSS Nanocomposite Ink for Flexible Transparent Conducting Applications,ACS Applied Electronic Materials

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Printable Silver Nanowire and PEDOT:PSS Nanocomposite Ink for Flexible Transparent Conducting Applications
ACS Applied Electronic Materials ( IF 4.3 ) Pub Date : 2020-03-18 , DOI: 10.1021/acsaelm.0c00061
Nitheesh M. Nair _{1,

2} , Jayaram Kizhekke Pakkathillam ₃ , Krishna Kumar ₁ , Kavitha Arunachalam ₃ , Debdutta Ray ₂ , Parasuraman Swaminathan ₁

Affiliation

Patterned deposition of highly flexible transparent conducting materials is essential to realize stretchable optoelectronic devices. Silver nanowires (NWs) are suitable for these applications because they possess high electrical conductivity and good optical transparency. However, NWs have poor surface adhesion and large roughness. Embedding them in a conducting polymer, such as poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS), is one way to overcome these disadvantages without affecting the optoelectronic properties. However, this is normally a two-step deposition process and difficult to pattern directly. In this work, we have formulated a stable and printable nanocomposite ink consisting of Ag NWs and PEDOT:PSS. This ink can be directly used for patterned deposition in a single-step process. The printed film shows 86% transparency and 23 Ω/sq sheet resistance, which is suitable for flexible transparent electrode applications. The printed film shows good adhesion and excellent stability to mechanical deformation, with less than 20% resistance variation after 10,000 bending cycles. The nanocomposite also exhibits improved thermal stability, planarity, reduced contact resistance, and good optical transparency when compared to pure Ag NWs. We demonstrate suitability of this nanocomposite using two applications −a printed transparent flexible antenna radiating at Wi-Fi frequencies and a printed transparent flexible heater suitable for antifogging applications. The nanocomposite properties make it suitable as a transparent electrode in flexible optoelectronic devices such as photovoltaics and light-emitting diodes.

中文翻译：

用于柔性透明导电应用的可印刷银纳米线和PEDOT：PSS纳米复合油墨

高柔性透明导电材料的图案化沉积对于实现可拉伸的光电器件至关重要。银纳米线（NW）具有较高的电导率和良好的光学透明性，因此适用于这些应用。但是，NW具有较差的表面附着力和较大的粗糙度。将它们嵌入导电聚合物中，例如聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT：PSS），是克服这些缺点而又不影响光电性能的一种方法。然而，这通常是两步沉积工艺，并且难以直接图案化。在这项工作中，我们配制了一种稳定且可打印的纳米复合墨水，该墨水由Ag NW和PEDOT：PSS组成。这种油墨可以直接用于单步工艺中的图案沉积。印刷的薄膜显示出86％的透明度和23Ω/ sq的薄层电阻，适用于柔性透明电极应用。印刷的膜表现出良好的附着力和优异的机械变形稳定性，在10,000次弯曲循环后电阻变化小于20％。与纯Ag NWs相比，纳米复合材料还具有改善的热稳定性，平面度，降低的接触电阻和良好的光学透明性。我们通过两种应用展示了这种纳米复合材料的适用性-一种以Wi-Fi频率辐射的印刷透明柔性天线和一种适用于防雾应用的印刷透明柔性加热器。纳米复合材料的特性使其适合用作柔性光电设备（例如光伏电池和发光二极管）中的透明电极。

更新日期：2020-03-18

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