DefinePK

Abstract

Nanocomposites of polymer electrolyte are prepared by embedding cupper sulfide or bismuth sulfide chalcogenide semiconductor particles in polymer electrolyte (PEO:NH4ClO4). The process of preparation is established by passing the hydrogen sulphide (H2S) through the polymer complex (PEO:NH4ClO4+ x wt.% copper sulphate/bismuth nitrate). Total conductivity is measured by semicircled cole-cole plots which indicated one order of increase of bulk conductivity (10-6 S/cm to 10-5 S/cm) with the dispersal of chalcogenide semiconductor particles (Bi2S3/CuS) in the complex. Contribution of electronic conductivity or ionic conductivity to the total conductivity is measured the Wagner’s polarisation plots. SEM studies showed the non-uniform distribution of the chalcogenide particles ranging from in the composites ranging from micro to nano sizes, TEM studies showed chain type structure for the interconnected (Bi2S3/CuS) dispersoid. The band gap of different colored composite films are measured by optical absorption studies which showed change in the band gap with change of size of dispersoid from micro to nano size.