Preparation and electrical properties in epoxy resin/In2O3:Sn nanocomposites materials for optoelectronics

To characterize the electrical properties of epoxy resin filled with different contents of Indium Tin Oxides (ITO) nanoparticles (In2O3 doped with 15% Sn). We study and discuss the Polarization and Depolarization Current tests (PDC). Using the depolarization current obtained at room temperature under several applied electric field, we perform the time to frequency domain transformation. Our results indicate that the transient currents behavior of the epoxy resin is affected by the presence of ITO nanoparticles. The obtained data were first analyzed in terms of the dielectric permittivity and then transformed to electric modulus to highlight conduction process. In the low frequency region, a weak MWS effect is recorded. This relaxation is ascribed to polarization phenomena taking place at the interfaces between the nano-ITO and the epoxy matrix.