Effect of iodine doping on the bandgap of plasma polymerized aniline thin films

Pure and iodine-doped polyaniline thin films are prepared by the ac plasma polymerization technique. Doping of iodine is carried out in situ as well as by employing iodine chamber methods. The structural analyses of pure and iodine-doped polyaniline thin films are carried out by FTIR spectroscopic s...

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Bibliographic Details
Published inJournal of physics. D, Applied physics Vol. 35; no. 17; pp. 2206 - 2210
Main Authors Mathai, C Joseph, Saravanan, S, Anantharaman, M R, Venkitachalam, S, Jayalekshmi, S
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 07.09.2002
Institute of Physics
Subjects
Applied sciences
Exact sciences and technology
Physicochemistry of polymers
Polymers and radiations
Properties and characterization
Conducting polymers
Molecular structure
Optical properties
Doping
Temperature effect
Ultraviolet visible spectrum
Infrared spectrum
Experimental study
Plasma deposition
Glow discharge polymerization
Aniline polymer
Iodine
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Summary:Pure and iodine-doped polyaniline thin films are prepared by the ac plasma polymerization technique. Doping of iodine is carried out in situ as well as by employing iodine chamber methods. The structural analyses of pure and iodine-doped polyaniline thin films are carried out by FTIR spectroscopic studies. Optical bandgaps of these films are evaluated from UV-VIS absorption studies. Direct and indirect transition energy gaps are determined from Tauc plots. The structural changes of polyaniline upon doping and the reduction of the optical bandgap are explained on the basis of the results obtained from FTIR spectroscopic and UV-VIS absorption studies (Author)
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/35/17/318