^1*Department of Physics, Pt. Neki Ram Sharma Government College, Rohtak -124001 (India)

Abstract 

The present work reports the synthesis of pristine polyaniline and Kiton Red 620 organic dye composites synthesized by in situ chemical oxidative polymerization with potassium dichromate as an oxidant in aqueous hydrochloric acid medium and chemical doping of Kiton Red 620 in polyaniline with different concentrations. The synthesized polymeric composites were characterized by Photoluminescence spectroscopy, X-ray diffraction and dc conductivity measurement techniques. Photoluminescence spectra confirm excellent electrooptical properties of prepared polymeric material, while X-ray diffraction patterns of exhibit amorphous behavior leading towards semicrystalline, as most conducting polymers have. For electrical investigations, dc conductivity has been measured by two probe method within temperature range 300-400 ºK and significant enhancement in dc conductivity has been observed simultaneously with increased in temperature; confirming semiconductor nature of synthesized polymer composites.

Keywords: Polyaniline, Kiton Red 620, X-ray diffraction, dc conductivity.