Preparation of Low Temperature Sintered Graphene/Silver Nanocomposite-Based Conductive Ink

Abstract

At present, most silver nanoparticles (AgNPs) conductive inks on the market are in high-temperature sintering modes. In order to increase the application range of printed electronics, it is necessary to prepare conductive inks with low-temperature sintering and good conductivity. In this study, AgNPs and RGO/AgNPs nanocomposites were prepared with glucose as the green reducing agent. The morphology and structural characteristics of the material were analyzed by XRD, SEM and TEM, which were shown that the average particle size of AgNPs was about 30 nm, and when the mass ratio of graphene oxide(GO) and silver nitrate is 1:3, the average particle size of AgNPs loaded on RGO was about 18 nm. The conductive ink was prepared by mixing RGO/AgNPs nanocomposite and AgNPs as conductive filler. After sintering at 100 °C at low temperature, the conductive property was excellent, and its resistivity could reach to 2.4 μΩ cm.