INVESTIGATION OF STRUCTURAL AND OPTICAL PROPERTIES OF SEMICONDUCTOR POLYMER POLY (5-(2-ETHYLHEXYLOXY)-2-METHOXY-CYANOTEREPHTHALYLIDENE)

Year 2016, Volume: 12 Issue: 2, 13 - 13, 01.08.2016

Hatice Kanbur Çavuş Hatice Arı

Abstract

Nowadays, polymer electronic devices can be used in a wide range of applications.
Especially, conjugated polymers have been studied due to their unique electronic and optical
properties. These polymer materials are used in many fields such as organic light emitting diodes
(OLEDs), Schottky diodes, organic solar cells, organic field effect transistors (FETs), photodetectors,
detection systems and batteries. In this study, among conjugated polymers (CyanoPolyphenylenevinylene,
CN-PPV polymers group) poly (5-(2-ethylhexyloxy)-2-methoxycyanoterephthalylidene)
was investigated (Figure 1) because this polymer has important properties
such as semiconductivity and photoconductivity. We have investigated structural and optical
properties of this polymer by using IR, Raman and UV measurements. As a result, IR and Raman
spectra peaks of polymer were found that correspond to groups in the structure. In addition, the direct
and indirect band gaps of the polymer from UV measurement were obtained as 2.5 and 2.22 eV,
respectively.

Keywords

Polymers, Optical properties, Band gap, Raman spectra, IR spectra