Analysis of thermally stimulated processes in new phenanthroline derivatives suitable for optoelectronic devices

Investigations of Novel High-Temperature Resistant Polymers for Electro-Optical Applications in Signal Processing Systems

“…In addition to the pure polymer PPQ-eth also mixtures of the polymer with three different chromophores (CH01 to CH03, introduced below) have been analysed by TSDC measurement [21]. The introduction of chromophores leads to a clear decrease of the glass transition temperature [22]. The TSDC can provide the energy of molecular motion activation, such as the dipolar rotation of the main chain and this can be used to determine the transition temperature to the glass phase.…”

“…The TSDC can provide the energy of molecular motion activation, such as the dipolar rotation of the main chain and this can be used to determine the transition temperature to the glass phase. In a normal TSDC experiment a sample is polarized at high temperature, which means an electric field of the order of 10 5 V/cm [22][23][24][25] Then the sample is cooled down to the liquid nitrogen temperature or below. During cooling under the effect of the applied field, the polymer dipoles retain their orientation.…”

“…In this particular case there are different phenomena related to changes in the free volume. In literature, there is an approach to this problem, made by Schrader [22][23][24][25]. In its analysis, an unexponential decrease in kinetic time dependence is proposed.…”

“…From the Equation (21) in accordance with van Turnhout's theory [22][23][24][25], it is possible to check whether the maximum current occurs at: dτ dt = −1 (22) or the equivalent:…”

“…Based on Equations (22) and (23) it is demonstrated that the main condition for a Debye peak can be written using the following equation:…”