The Role of Rubrene Concentration on Dielectric Parameters of Nematic Liquid Crystal
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Dosyalar
Tarih
2023
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Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this study, the dielectric parameters of E7 coded nematic liquid crystal (NLC) composites containing the different amounts of rubrene fluorescent dye were investigated. E7, E7+0.5 wt.% Rubrene, and E7+1.0 wt.% Rubrene samples were prepared. Frequency dependent dielectric constants (?? and ???), dielectric anisotropy (???), and ac conductivity (?ac) graphs of rubrene doped E7 NLC composites were obtained by dielectric spectroscopy method and compared with pure E7 NLC. By using these graphs, relaxation frequency (fR), relaxation time (?R), dielectric strength (???), and crossover frequency (fc) parameters of the E7 NLC and its rubrene doped composites were determined. An increase in fR from 3.045 MHz to 3.697 MHz for 0 V and from 627 kHz to 686 kHz for 40 V was observed with increasing rubrene concentration. On the other hand, a decrease in ?R from 0.052 ?s to 0.043 ?s for 0 V and from 0.254 ?s to 0.232 ?s for 40 V was seen with increasing rubrene concentration. Furthermore, an increase in fc from 1.145 MHz to 1.298 MHz was obtained with increasing rubrene concentration. The results show that the dielectric parameters change with the concentration of rubrene and it is thought that this study will provide a basis for investigating the dielectric properties of rubrene doped NLC composites. Moreover, it is concluded that the produced composites are a suitable base material for electro-optical device applications such as smart displays, photonics and electrical circuit elements.
Açıklama
Anahtar Kelimeler
Kaynak
Hittite Journal of Science and Engineering
WoS Q Değeri
Scopus Q Değeri
Cilt
10
Sayı
3
