The influence of crosslinker concentration on PVA insulation characteristics

The aim of this work is to evaluate the effect of the concentration of cross-linking agent on the dielectric characteristics and performance of Polyvinyl Alcohol (PVA) when applied as dielectric material in organic field effect electronics. For this purpose, Al/PVA/Si capacitors were manufactured with 5 different concentrations of Ammonium Dichromate as cross-linking agent. The electrical characterization of the structures was performed through current–voltage and capacitance–voltage curves at different frequencies. The crosslinking agent and water concentration in the structures have a direct influence on the rigidity of the material. The chain mobility increases the dielectric constant and decreases the insulation, generating the need to compromise between these two properties.