Abstract
A capacitively coupled parallel plate glow discharge reactor has been utilized to develop plasma polymerized diethanolamine (PPDEOA) thin films to look into the alternating current (AC) features of PPDEOA thin films. It is observed that the dielectric constant, ɛ′ in PPDEOA thin films enhances by declining the frequency and that increases with increasing temperature. The AC electrical conductivity, σac is frequency dependent. The frequency exponent, s values are found to be 0.32 to 1.0 and 1.0 to 1.8 in the lower (102–103 Hz) and higher (>103 Hz) frequencies, respectively. These suggest the presence of hopping conduction in the lower frequency region and other mechanisms in the higher frequency region. The activation energies are derived to be 0.03 to 0.28 eV illustrating the less effect of temperature on them. The real part, M´ and imaginary part, M ̋ of electric modulus vary with frequency. The frequency dependent loss tangent, tanδ is obtained. The ɛ′, σac , and tanδ deviate by the virtue of film thicknesses.
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