Electrical Properties of Pure and Doped (KNO3 & MgCl2) Polyvinyl Alcohol Polymer Thin Films

Abstract

Polymer thin film technology has made tremendous growth due to the range of technological applications such as coatings, light emitting diodes, photodiodes, sensors and batteries. These applications of thin films are possible as they are easy to fabricate and the effects due to confinement and interfacial interactions are responsible for different physical phenomenon that depend on thickness of thin films which cannot be observed in bulk materials. In the present work pure and doped (KNO 3 & MgCl 2) Polyvinyl Alcohol thin films are synthesized using solution casting technique. Electrical conduction in polymers has been studied aiming to understand the nature of the charge transport prevalent in these materials. The variation of conductivity with temperature shows Arrhenius behaviour. Activation energies are calculated from these studies and noted that these depend on the type of dopant material.

A Comprehensive Review on Optical Properties of Polymer Electrolytes and Composites

“…However, the authors had not specified the type of electronic transition within pure PVA. It was found that the value of E g of PVA pure was 4.8 eV which is nearly comparable to that reported 5.1 eV [ 311 ] and 5.05 eV [ 312 ]. It was also seen that the value of E g for pure PVA was higher than all the composites and it declined with rising TiO 2 NPs in the host matrix of PVA, indicating defect formation (extra energy levels).…”

Mesoporous K-doped NiCo2O4 derived from a Prussian blue analog: high-yielding synthesis and assessment as oxygen evolution reaction catalyst

“…These values indicate faster interfacial charge and electron transfer in HK-NCO and are directly related to OER performance. According to previous reports, 26,27,50,51 the electrical conductivity can be increased by the incorporation of KNO 3 . Therefore, we concluded that the KNO 3 present in both catalysts contributed to their increased conductivity and decreased resistance.…”

“…Previous reports have shown that the electrical conductivities of such systems increase with an increase in the number of K + ions because of the concomitant enhancement of ionic properties. [26][27][28] Therefore, the KNO 3 formed during the calcination of K-Ni-Co-PBA was expected to provide K + ions and thus increase ion mobility and electrical conductivity. It should be noted that we successfully observed a calcination-induced phase change during the preparation of PBA-derived NCO nanoparticles.…”

The Effect of Temperature on the Conductivity of Polymer Films

“…The frequency-dependent conductivity ) (  follows the universal power law equation (Sreelalitha, 2014).…”