Preparation, structural and optical investigations of ITO nanopowder and ITO/epoxy nanocomposites

The gap energy of epoxy matrix was reduced by adding the ITO-NPs, leading to the improvement of its electrical conductivity. Indeed, the AC electrical conductivity of ITO-EP-NCs showed a critical percolation threshold pc=0.21 wt% ITO. For low loading (<2 wt% ITO), the ITO-EP-NCs have combined good transparency in the visible range and enhanced electrical conductivity, which are required for optoelectronics devices.