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IJPAP Vol.46(06) [June 2008] >

Title: Temperature dependence of conductivity of polypyrrole doped with sulphuric acid
Authors: Shaktawat, Vinodini
Jain, Neeraj
Dixit, Manasvi
Saxena, N S
Sharma, Kananbala
Sharma, T P
Keywords: Conducting polymer
Electrical conduction
Temperature dependence
Activation energies
Issue Date: Jun-2008
Publisher: CSIR
Abstract: Polypyrrole samples doped with sulfuric acid have been synthesized by using chemical oxidative polymerisation technique in different ways. The monomer mixed with acid (sample S₁) and oxidant mixed with acid (sample S₂) is characterized by XRD and FTIR spectroscopy. Electrical conduction in these doped samples are studied through the I-V measurements at room temperature as well as function of temperature from 313 to 473 K. The I-V lharacteristics for both the samples have been found to be linear but conductivity of sample S₂ is found to be higher. Temperature dependence of conductivity suggests a transition from semiconducting nature to metallic nature with increase in temperature. Activation energies for both the samples have been found to be in milli electron volt range, 96.76 meV and 116.72 meV for samples S₁ and S₂, respectively.
Page(s): 427-430
ISSN: 0019-5596
Source:IJPAP Vol.46(06) [June 2008]

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