A study on the optoelectronic parameters of natural dyes extracted from beetroot, cabbage, walnut, and henna for potential applications in organic electronics
Document Type
Article
Publication Date
1-1-2022
Abstract
The optoelectronic parameters of natural dyes extracted from beetroot, red cabbage, walnut leaves, and henna were comprehensively investigated, namely the optical energy gap (E-g), extinction coefficient (k), refractive index (n), dielectric constant (epsilon(r)), and optical conductivity (sigma(r)). Results showed a high refractive index, dielectric constant and optical conductivity (n = 6.08, epsilon(r) = 37.18 and sigma(r) = 13.92 x 10(-3)S/cm) for the dye extracted from red cabbage, while minimum values of n = 1.19, epsilon(r) = 1.5 and sigma(r) = 0.039 x 10(-3) S/cm were obtained for the henna dye. The transition type of the optical absorption of the dyes was found to be a direct allowed transition, which is taken place between the bonding and antibonding molecular energy levels. The reported results herein are essential in revealing the viability of these natural dyes for potential applications in organic electronics, including organic photovoltaics, photodiodes, and sensors.
Keywords
Optoelectronic parameters, Natural dyes, Beetroot, Cabbage, Walnut, Henna
Divisions
Science
Funders
Ministry of Higher Education and Scientific Research-Kurdistan Regional Government-Charmo University-College of Medical and Applied Science - Department of Applied Physics
Publication Title
Journal of Fluorescence
Volume
32
Issue
1
Publisher
Springer/Plenum Publishers
Publisher Location
233 SPRING ST, NEW YORK, NY 10013 USA