Optical properties of electrochemically synthesized polypyrrole thin films:the electrolyte effect  

作　　者：J.V.Thombare S.K.Shinde G.M.Lohar U.M.Chougale S.S.Dhasade H.D.Dhaygude B.P.Relekar V.J.Fulari 

机构地区：[1]Holography and Materials Research Laboratory,Department of Physics,Shivaji University [2]Department of Physics,Vidnyan Mahavidyalya,Sangola

出　　处：《Journal of Semiconductors》2014年第6期1-4,共4页半导体学报（英文版）

基　　金：the Department of Science and Technology,New Delhi,for financial support under the DST-PURSE scheme at the Shivaji University,Kolhapur

摘　　要：Polypyrrole thin films are prepared by the potentiostatic mode of electrodeposition at ＋0.7 V versus a saturated calomel electrode （SCE）. The polypyrrole films are prepared in the presence of different electrolytes such as： p-toluene sulphonic acid （PTS）, oxalic acid and H2SO4. The prepared films are characterized by UV- vis absorption spectroscopy and normal reflectance measurements. The electrochemically synthesized films are semiconductor in nature. The band gap energy ofpolypyrrole thin films is found to be 1.95, 1.92 and 1.79 eV for H2 SO4, oxalic acid and p-toluene sulphonic acid, respectively. The normal reflectance spectroscopy of polypyrrole films shows that the maximum reflectance is in the presence of p-toluene sulphonic acid; this is may be due to a more distinct microstructure than the others. The optical constants such as the extinction coefficient, refractive index, optical conductivity, etc. are calculated and studied with various electrolytes.Polypyrrole thin films are prepared by the potentiostatic mode of electrodeposition at ＋0.7 V versus a saturated calomel electrode （SCE）. The polypyrrole films are prepared in the presence of different electrolytes such as： p-toluene sulphonic acid （PTS）, oxalic acid and H2SO4. The prepared films are characterized by UV- vis absorption spectroscopy and normal reflectance measurements. The electrochemically synthesized films are semiconductor in nature. The band gap energy ofpolypyrrole thin films is found to be 1.95, 1.92 and 1.79 eV for H2 SO4, oxalic acid and p-toluene sulphonic acid, respectively. The normal reflectance spectroscopy of polypyrrole films shows that the maximum reflectance is in the presence of p-toluene sulphonic acid; this is may be due to a more distinct microstructure than the others. The optical constants such as the extinction coefficient, refractive index, optical conductivity, etc. are calculated and studied with various electrolytes.

关 键 词：ELECTRODEPOSITION POLYPYRROLE extinction coefficient refractive index 

分 类 号：TM914.4[电气工程—电力电子与电力传动]