1Department of Physics, Kongunadu Arts and Science College, G.N. Mills, Coimbatore, Tamil Nadu, India
2Department of Nanoscience and Technology, Bharathiar University, Coimbatore, Tamil Nadu, India
*Corresponding author: E Mail: hbcss@yahoo.com
Online published on 7 April, 2014.
Polyvinyl alcohol (PVA) films were prepared on pre-cleaned glass substrates by solution growth technique. Sandwich structures of the type Aluminium – PVA – Aluminium were formed to study the Thermally Stimulated Discharge Current (TSDC) and pyroelectric behaviour of PVA thin films. Aluminium (Al) electrodes were deposited by vacuum deposition method. Thicknesses (d) of the dielectric films were measured by an electronic linear thickness measuring instrument (Tesatronic TTD 20 model) and cross checked by a capacitance method. The low activation energy (E) of about 0.09 eV obtained suggested the predominance of the space charge polarization. The relaxation time (τ) was calculated to be around 3.2644 × 10–17 seconds
Activation energy, polyvinyl alcohol, thermally stimulated discharge current, polarizing temperature
