Full length articleOptical and dispersion properties of thermally deposited phenol red thin films
Introduction
Recent researchers have developed in using Organic materials for the fabrication of microelectronic devices. The performance of these devices is dependent on a variety of factors such as fabrication parameters, characteristics of the Organic materials used and their optical and electrical properties [1]. Thus, organic materials have grown due to the wide range of applications in photonic devices, such as sensors, light emitting diodes, solar cells, limiters, and optoelectronic devices [2]. During the last few years, interest in organic semiconductors and their thin films increased rapidly due to [3] the processing at low temperature, material variety, design flexibility, and environmental safety [4]. The organic molecules of interest for optoelectronic applications offer alternate σ and π bonds that form extended chains or rings. The construction of such alternate-bond structures produces π-electrons that are highly delocalized [5] and leading to the characteristic optical properties of these compounds.
The organic dye materials are highly desire for the optical applications due to their stellar optical properties [2], [6]. The optical behavior of materials is important to determine its usage in optoelectronic devices [7]. In the present work, we report on the study of the optical and dispersion properties of phenol red thin films. Phenol red dye (C19H14O5S) has the molecular structure that shown in Fig. 1. Thin films of phenol red are obtained by thermal evaporation technique onto quartz and glass substrates. The crystal structural of the powder of phenol red is indexed using X-ray diffraction (XRD) analysis. The optical constants (refractive and extinction indices), optical transition, dispersion parameters are deduced for phenol red films. Also, the influence of the annealing for as-deposited films at 373 for 2 h is investigated on the structural and optical properties of phenol red films.
Section snippets
Experimental procedures
The powder of phenol red purchased from sigma Aldrich company and used without additional purification. Phenol red thin films prepared using thermal vacuum evaporation technique with a high coating unit (E 306A, Edwards, England). The films deposited onto precleaned glass and quartz substrates for structural and optical measurements, respectively. The substrate temperature kept at room temperature. The deposition of phenol red films was carried out using a quartz crucible source heated slowly
Structural characterization
Fig. 2 represents XRD pattern of phenol red in the powder form in 2θ° range of 4° – 60°. Many diffraction peaks appeared in the XRD pattern, indicating that a polycrystalline nature for the phenol red. The crystal structural of phenol red is examined from the obtained XRD data using the CRYSFIRE program [13]. The result showed that phenol red is a triclinic crystal system with lattice parameters; a = 8.377 Å, b = 11.277 Å, c = 13.214 Å, α = 67.73°, β = 77.51°, γ = 78.54° and the space group is
Conclusion
Phenol red thin films are prepared using thermal evaporation technique. Some films of phenol red are annealed at 373 for 2 h. The crystal structural of powder of phenol red is examined as a triclinic crystal system with lattice parameters; a = 8.377 Å, b = 11.277 Å, c = 13.214 Å, α = 67.73°, β = 77.51°, γ = 78.54°. XRD results indicate that as-deposited and annealed thin films of phenol red are amorphous. The transmittance spectra of thin films showed an absorption region for lower wavelengths
References (35)
- et al.
J. Molec. Struct.
(2015) - et al.
J. Non-Cryst. Solids
(2013) - et al.
Journal of Luminescence
(2011) - et al.
Sol. Energy Mater. Sol. Cells
(1993) - et al.
Physica B
(2010) - et al.
Mater. Lett.
(1999) - et al.
Biophys. J. Biophys. Soc.
(1992) - et al.
Opt. Laser Technol.
(2003) - et al.
J. Mater. Sci.: Mater. Electron.
(2013) - et al.
Adv. Mater. Phys. Chem.
(2016)
Mater. Sci.
Int. J. Sci. Res. (IJSR)
Device modelling of organic bulk heterojunction solar cells
J. Appl. Phys.
Turk. J. Phys.
Multiple-Beam Interferometry Surface and Films
Synth. Met.
Cited by (42)
Fluorine derivatives of piceatannol for photobiological and photophysical applications by DFT approach
2023, Chemical Physics LettersImmobilization of commercial horseradish peroxidase in calcium alginate-starch hybrid support and its application in the biodegradation of phenol red dye
2023, International Journal of Biological Macromolecules