A5011102432- ZnO doping and properties
- Ga2O3 and related materials
- Advanced Photocatalysis Techniques
- Transition Metal Oxide Nanomaterials
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Copper-based nanomaterials and applications
- Gas Sensing Nanomaterials and Sensors
- TiO2 Photocatalysis and Solar Cells
- Electronic and Structural Properties of Oxides
- Conducting polymers and applications
- Analytical Chemistry and Sensors
- Luminescence Properties of Advanced Materials
- Iron oxide chemistry and applications
- Electrochemical sensors and biosensors
- Perovskite Materials and Applications
- Thin-Film Transistor Technologies
- Advanced biosensing and bioanalysis techniques
- Advanced Nanomaterials in Catalysis
- Surface Roughness and Optical Measurements
- Polymer Nanocomposite Synthesis and Irradiation
- Carbon and Quantum Dots Applications
- Pigment Synthesis and Properties
- Advancements in Battery Materials
- Extraction and Separation Processes
Benue State University
2023-2025
University of Agriculture
2015-2024
Universiti Sains Malaysia
2019-2024
Federal University of Agriculture
2020-2024
Hospital Universiti Sains Malaysia
2020
The use of the conventional Tauc's method to determine optical bandgap energy from UV–vis spectroscopy data has been overemphasized for decades. However, a misuse formula in conjunction with Kubelka-Munk function semiconductors diffuse reflectance can lead erroneous estimates. Particularly, large errors be associated computing values ordinate using Tauc-Kubelka-Munk relationship produce plot. To address this apparent error, present paper shows that versus photon plot estimation employed...
The Tauc method is the conventional technique for estimating accurate optical bandgap energy of semiconductors using UV–Vis spectroscopy. proper usually determined by directly extrapolating linear region spectrum to horizontal axis plot αhv1/r vs. hv. However, use unconventional plots, such as α1/r hv, A1/r and FR∞ hv are also found in literature. This raises a debate whether these nontraditional methods can produce correct value. These uncommon appear frequently even recent papers published...
The degradation of methylene blue dye-contaminated wastewater via photocatalysis is an efficient approach towards environmental remediation. SrZrO3 perovskite photocatalyst was synthesized using the modified Pechini sol-gel method, and characterized XRD, FESEM, FTIR, UV–visible spectrophotometer. Crystallite size obtained by Scherrer Williamson-Hall methods were 45.56 44.50 nm, respectively. sample exhibited orthorhombic crystal structure. optical bandgap estimated to be 5.31 eV. Kinetic...
Highly arranged porous anodic titania (TiO 2 ) nanotube arrays (ATNT) were fruitfully fabricated by the anodization of Ti foil in an ammonium fluoride electrolyte.
Abstract The optical diffuse reflectance data of a semiconductor material is usually converted into the Kubelka–Munk function before proceeding to process conventional Tauc’s plot from which bandgap energy can be determined. Firstly, it conventional/ customary convert percentage ( R ∞ (%)) obtained UV-vis measurement an equivalent ) that range between 0 and 1 processing plot. Secondly, multiplied by incident photon energy, hv , produce all-elements/ comprehensive Literature scarce...
Zinc sulfur-selenide (ZnSxSe1-x) (0 ≤ x 1.0) thin films were grown on glass substrates using photo-assisted chemical bath deposition technique and the deposited samples annealed in an open-air furnace at 250 ℃ for 3 h. X-ray diffraction analysis revealed a phase transition from hexagonal ZnSe to cubic ZnS as changes 0 1.0. Raman scattering showed two longitudinal optical modes due structure. The effects of S Se ions variation is observed by change surface morphology nanoflakes spherical...
The rising demand for heterojunction materials stimulated by the great achievements of modern nanotechnology has triggered enormous interests in investigation their properties. Heterostructured ZnO/Ga2O3 been deployed different device applications, but its several optical parameters have rarely investigated. present work attempts to investigate influence thickness stacked ZnO layer on surface Ga2O3 film. Optical parameters, such as absorption and extinction coefficient, Urbach energy,...
Abstract This study involved the hydrothermal synthesis of vertically oriented TiO 2 nanorods on FTO substrate. We examined impact reaction duration morphological, optical, structural and photoelectrochemical properties. The formation was confirmed by FESEM AFM results. tetragonal crystal structure with rutile phase shown XRD spectra. average absorbance samples falls as increases, according to UV–vis spectroscopy analysis. According PEC experiments, each sample demonstrated a strong...
Organic semiconductors have several advantages over conventional inorganic semiconductors. The optical properties of π-conjugated organic molecules are important in determining the performance efficiencies photovoltaic cells, optoelectronic devices and thin-film transistors lasers. This work examined variation absorption spectra three (perylene, pentacene, sexithienyl) with their geometries intermolecular distances between dimer molecules. Quantum mechanical calculations using PM3...
This study investigates the effect of varying dielectric layer thickness on optical properties solar cells using MATLAB. Dielectric layers with ranging from 10 to 100 nm were analyzed across 200 1200 wavelengths. Results showed that absorption efficiency increased thickness, reaching a peak at nm, where value was approximately 0.9 600 nm. Reflectance stabilized around 0.45 0.50, while transmittance minimized about 0.05, indicating almost all incident light absorbed or reflected this...