Structural, Optical, and electrical properties of polymeric composites doped with K2PtCl6

•The effect of K2PtCl6 on the structural, optical, and electrical parameters of a PEO/K2PtCl6 composite films.•The bandgap energy of PEO/K2PtCl6 composite films decreases to 4.25 eV as K2PtCl6 concentration increases to 5 wt%.•PEO/K2PtCl6 composite films conductivity increases to 7.79×10-9S.cm−1 as K2PtCl6 concentration increases to 5 wt% This study examines the impact of dipotassium hexachloroplatinate (K2PtCl6) on the structural, optical, optoelectronic, and electrical properties of polyethylene oxide (PEO) composite films. X-ray diffraction analysis indicates that the crystallinity of the PEO/K2PtCl6 composite films decreases from 49.1 % to 38.4 % with increasing K2PtCl6 concentrations, ranging from 0 to 5 wt%. These composite films exhibit high transmittance values (>89%) in the visible region. The optical bandgap energy decreases from 4.39 eV to 4.25 eV with an increase in K2PtCl6 concentration to 5 wt%. Electrical conductivity, determined using a 4-point probe, shows an increase from 4.72×10-6 S/cm to 1.10×10-3 S/cm as the K2PtCl6 concentration increases to 5 wt%. Additionally, the AC conductivity spectra σ′f of the PEO/K2PtCl6 composite films were analyzed, showing that the West expression effectively models the conductivity spectra. At 280 K, σ0 increases continuously from 9.83×10-12 S/cm to 7.79×10-9 S/cm as the K2PtCl6 concentration increases from 0 to 5 wt%.