Study of temperature effect on dielectric properties of nanowire doped polymer nanocomposite films

We report the preparation of a novel solid polymer electrolyte based on PEO-PVP + NaPF6 with the incorporation of self-prepared Indium Arsenide (InAs) nanowire (NW) through standard solution cast technique. The dielectric properties were investigated in a broad temperature range (T = 40°C-100°C) to see the thermal viability of such material system. The effect of temperature on the complex permittivity, complex conductivity and loss tangent is explored carefully. The real and imaginary part of complex permittivity shows linear variation w.r.t. temperature. The increase of dielectric constant with temperature infers the release of more free charge carriers from the system. The relaxation time has been extracted from the theoretical fitted dielectric parameters. The decrease of estimated relaxation time indicates faster segmental motion of polymer chain. Loss tangent shows shift toward higher frequency with increase of temperature further supporting the fast transportation of charge carriers in ionic system.