Investigation of the doping mechanism and electron transition bands of PEO/KMnO4 complex composite films

Abstract Polyethylene oxide (PEO) incorporated with potassium permanganate (KMnO 4 ) was prepared using the solution casting technique forming PEO/KMnO complex composite films. The physicochemical properties, doping mechanism, and electron transition bands of were investigated. Introducing KMnO PEO matrix led to a decrease in crystallinity degree optical bandgap energy due creation polarons bipolarons that form new levels between HOMO LUMO; addition, band appears at about 380 nm is attributed $$n{-}{\pi }^{*}$$ n - π ∗ electronic transitions are generated unsaturated center molecules. existence polymer leads blocking light 250–400 range. Consequently, films could be used as UV-light shielding filters. Furthermore, electrical conductivity increases concentration increased since created LUMO can populated conduction electrons providing true ohmic delocalization densities moving on chain.