Highly Transparent Conductive Sheet by Self-assembled Silver Network Electrodes with Antireflective Coating via Roll-to-Roll Process

K Fujimoto,K H Kyung,S Shiratori

doi:10.1051/matecconf/20130405007

Abstract

A highly transparent conductive film was fabricated using self-assembled silver electrodes with anti-reflection (AR) film. The micro pore diameter of sliver nanoparticles (ca 50～60nm in diameter) network electrodes expanded to size of 200-300 μm by the increase of air voids with evaporated water. The transmittance of the silver network electrode increased was drastically increased by the optical interference from the AR film on the surface and it showed a maximal value 84％ (sheet resistance: 8.0 Ω/□). The surface resistance of silver network electrodes films did not change even after coating with the AR films because thickness of AR films (ca 100～200 nm) are extremely thin compared with the diameter of the silver wire (ca 3 μm). High performance transparent conductive film for electric and optical devic was successfully fabricated by roll to roll layer-by-layer (LBL) process.

Highlights

Self-assembly processes have been well known as one of the effective method for preparing nanoscale multilayer films from molecular scale to microscale by a bottom-up approach
We reported highly transparent conductive film, which has self-assembled silver network electrode and anti-reflection film
The enhancement transmittance of silver electrodes was confirmed by the adjustment of microstructure of silver network and anti-reflective interference

Summary

Introduction

Self-assembly processes have been well known as one of the effective method for preparing nanoscale multilayer films from molecular scale to microscale by a bottom-up approach. Layer-by-layer (LBL) self-assembled multilayer films are constructed from various nano scale order materials on three dimensional substrates such as optical lenses [12], particles [13] and mesh substrate [14]. It can fabricate functional nano structural film via roll-to-roll process [15-17]. Most of the transparent conductive films are indium tin oxide (ITO) film which used rare metal, and produced using vacuum processing. It is expected for the practical realization of transparent conductive film by simple wet process without using vacuum process. We report the fabrication of transparent conductive films by selfassemble of silver nano particles to form the microscale network electrode with the deposition of anti-reflection (AR) film to increase the transparency of visible light

Methods

Results

Conclusion