Table of Contents
Journal of Coatings
Volume 2014 (2014), Article ID 437302, 5 pages
http://dx.doi.org/10.1155/2014/437302
Research Article

Influence of the Temperature as an Environmental Factor on the Electrophysical Behavior of Flexible Polymeric Luminescent Devices

Department of Microelectronics, Technical University of Sofia, Kliment Ohridski Boulevard 8, Building 1, Room 1000B, 1000 Sofia, Bulgaria

Received 30 May 2014; Accepted 28 August 2014; Published 10 September 2014

Academic Editor: Denis Dowling

Copyright © 2014 Mariya Aleksandrova. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The effect of operational temperature on the electrophysical properties of polymer based electroluminescent structures is examined. For this purpose thin film of light-emitting semiconductor polyphenylenevinylene derivative is deposited between two indium-tin oxide (ITO) electrodes. DC current-voltage (I-V) characteristics of the fabricated devices ITO/polyphenylenevinylene derivative PPV-D/ITO are measured at varying ambient temperatures, ranging from room temperature (25°C) to 70°C. Several important electrical parameters like a trap factor, traps activation energy distribution, free carriers’ density, trapped carriers density, and effective mobility are estimated from measured temperature dependent I-V curves. Such analysis of the charge transport process in polymer devices may give information needed for optimization of the existing structures.