Dielectric properties of CdSeS/ZnS quantum dots doped PMMA/LC composite structure

ABSTRACT

In this work, electrical and dielectric properties of CdSeS/ZnS quantum dots (QDs) doped Polymer/Liquid Crystal composite structures (PMMA/LC) were investigated by using Dielectric Spectroscopy Technique in the frequency range of 100 Hz-10 MHz at room temperature. In order to determine the effect of quantum dot concentrations, PMMA/LC composites structure was dispersed with 0.5, 1 and 1.5 wt% CdSeS/ZnS QDs. Hence some considerable physical parameters such as dielectric constant (ε′ and ε″), dielectric anisotropy (Δε′), relaxation frequency (f_R), relaxation time (τ) as a function of frequency were obtained depend on QDs concentrations. Results show that QDs contribution have occurred significant changes in dielectric properties of investigated samples which can be used in PMMA/LC based device applications.

KEYWORDS:

• Dielectric properties
• liquid crystal
• quantum dots
• polymer

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

Gülnur Önsal http://orcid.org/0000-0001-9884-3345

Additional information

Funding

This work was supported financially by Düzce University Scientific Research Project [Project No: 2019.05.02.920].