eng Ansari Education and Research Society Journal of Ultra Chemistry 0973-3450 2319-8036 August 2026 22 3 40 48 http://dx.doi.org/10.22147/juc/220302 934 article SNEHA ANKOLEKAR 1 TANISHA REVANKAR 1 SHRESHTHA NAIK 1 ULLAS N SHETTI 2 G. RAJESHA SHETTY 3 SHREEDATTA HEGDE 4 ISHWAR NAIK 5 Post Graduate Department of Industrial Chemistry, Government Arts and Science College (Autonomous) Karwar-581301 (INDIA) Department of Chemistry , Government First Grade College Hulkoti - 582205 (INDIA) Department of Physics, Maharaniu2019s Science College for Women (Autonomous), Mysuru - 570005 (INDIA) Department of Physics, Government First Grade College for Women, Balmatta, Mangaluru - 575001 (INDIA) Department of Physics, Government First Grade College Kumta - 581343 (INDIA) <p style="text-align:justify">Poly(3-hexylthiophene-2,5-dyil) (P3HT) doped Polymethyl methacrylate (PMMA) free standing films are prepared by solution cast method. Weight ratios are maintained at very low concentrations of the dopant in the range 0.001wt% to a maximum of 0.7wt%. UV-Visible ,Fluorescence, AC conductivities and Xray diffraction studies are carried out. A multi band gap material with band gaps in the ranges of 4.5 to 5eV, 4 to 4.5 eV, 3 to 3.5eV and 1.5 to 2eV have been noticed. PMMA being an insulating matrix turns out to be a conducting material with the insertion of highly conjugate P3HT polymer. Fluorescence excited by 375nm at room temperatureaffirmed no drastic changes in the emission property of P3HT inside PMMA environment. There is increase in ac electrical conductivity, dielectric constant as expected. XRD diffractograms revealed diffused diffraction bands indicating the polycrystalline nature of the new material. Transparent polymer films can be used in theconstruction of solar cells, LEDs, display systems and even as a transparent electrode.</p> https://journalofchemistry.org/paper/934/ P3HT PMMA ICP Band gap, chain conformations