Optical and electrical analysis of polyethylene oxide/ disodium hexachloroplatinate complex composite films

The present study reports the synthesis of composite films comprising PEO/-Na2PtCl6complex and their deposition onto fused silica substrates via the dip-coating method. Chemical, crystallographic, and thermal characterizations arecarried out to confirm the incorporation of Na2PtCl6and PEO matrix into thefilms. The transmittance of the PEO film is initially high and decreases subs-quently with an increase in Na2PtCl6content. The optical band-gap energy ofthe composite films decreases exponentially from 4.62 to 3.79 eV with theincrease in Na2PtCl6content. Furthermore, in the normal dispersion region,the refractive index of the PEO film decreases from 2.00 to 1.670 as the wave-length increases from 400 to 700 nm. The refractive index values increase withan increase in the concentration of Na2PtCl6in the PEO film up to 8 wt.%. Theincorporation of Na2PtCl6into the PEO matrix increases the electrical conduc-tivity because of the combined enhancement of the PEO conductivity andincrease i Na2PtCl6. These findings suggest that PEO/Na2PtCl6complex com-posite films have potential applications in UV-shielding and optoelectronnic devices.