Abstract

Aim: Studying the optical-thermal dependence of liquid crystal based on the quantity data of image texture is essential to get more information accurately.

Background: In this research, the optical-thermal dependence of chiral nematic liquid crystals ink sample was investigated based on the sample's texture and colour changes at various temperatures.

Objective: The structural and optical characteristics of ZnO thin films are investigated in this study. While spinning at 4000 rpm for 30 seconds at room temperature, the zinc oxide solution was spun onto a pre-cleaned, glass substrate, creating the desired layer thickness.

Methods: This was followed by annealing at 150°C-600°C in 50°C steps, which was carried out on the samples. An ultraviolet-visible spectrophotometer and a scanning electron microscope were used to analyse the optical properties of this thin coating.

Results: Zinc oxide's optical band gap was determined by measuring its optical transmittance, reflectance, and absorbance. Photonic crystals can exhibit relevant optical properties when transmitting or reflecting a light beam.

Conclusion: In particular, in a two-dimensional photonic crystal, the reflective properties can be of interest and consequently optimized for different technological applications such as tuneable laser cavities, photovoltaic solar systems, and selective highreflection mirrors, among many others.

Keywords: Composite materials, ZnO-Si, thermal annealing effects, optical thermal dependence, photonic crystal, sonication, photonic devices.