A5021664236- ZnO doping and properties
- Copper-based nanomaterials and applications
- Ga2O3 and related materials
- Gas Sensing Nanomaterials and Sensors
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Electronic and Structural Properties of Oxides
- Crystallization and Solubility Studies
- Magnesium Oxide Properties and Applications
- X-ray Diffraction in Crystallography
- Luminescence Properties of Advanced Materials
Polish Academy of Sciences
2020-2025
Institute of Physics
2020-2024
National Institute of Technology Rourkela
2017
In situ Eu-doped ZnCdO-ZnMgO superlattices with varying ZnCdO:Eu and ZnMgO sublayers thicknesses were deposited by plasma assisted molecular beam epitaxy.
In situ Eu-doped {ZnCdO/ZnMgO} superlattices (SLs) with varying ZnCdO and ZnMgO sublayer thicknesses were deposited using plasma-assisted molecular beam epitaxy.
This article explores the structural properties of molecular beam epitaxy grown {CdO/MgO} superlattices on sapphire substrates different crystallographic orientations (a-, c-, r-, and m-plane). The investigations involve a comprehensive analysis using X-ray diffraction Raman spectroscopy. High-resolution studies unveil significant influence surface symmetry both epitaxial layers, particularly with respect to occurrence twins in superlattices. Remarkably, no are observed r-oriented...
The structural, optical, and electrical properties of ZnO are intimately intertwined. In the present work, structural transport 100 nm thick polycrystalline films obtained by atomic layer deposition (ALD) at a growth temperature (Tg) 100–300 °C were investigated. showed dependence on substrate (a-Al2O3 or Si (100)) high sensitivity to Tg, related deviation film stoichiometry as demonstrated RT-Hall effect. average crystallite size increased from 20–30 for grown samples 80–100 after rapid...
Abstract Trends in the behavior of band gaps short-period superlattices (SLs) composed CdO and MgO layers were analyzed experimentally theoretically for several thicknesses sublayers. The optical properties SLs investigated by means transmittance measurements at room temperature wavelength range 200–700 nm. direct gap {CdO/MgO} tuned from 2.6 to 6 eV varying thickness 1 12 monolayers while maintaining same layer 4 monolayers. Obtained values indirect are higher than those calculated an ab...
Optical properties of thin (≈100 nm) ZnO films in comparison with thick (≈1 μm) layers deposited on sapphire substrates by atomic layer deposition (ALD) at temperatures from 100 to 300 °C are investigated optical transmittance and luminescence. It is found that growth temperature, the thickness layers, post‐grown annealing influence measured bandgap values low‐temperature photoluminescence. However, bandgaps corrected according Burstein–Moss effect do not depend thickness, whereas an...
The article presents a systematic study of Sb-doped Zn1−xMgxO layers, with various concentrations Mg, that were successfully grown by plasma-assisted MBE on polar a- and c-oriented non-polar r-oriented sapphire substrates. X-ray diffraction confirmed the c-orientation alloys c-and a-oriented structures A uniform depth distribution Sb dopant at level 2 × 1020 cm−3 was determined SIMS measurements. Raman spectroscopy revealed presence Sb-related modes in all samples. It also showed Mg alloying...
The nanoscale morphology of short-period {CdO/ZnO}n superlattices (SLs) grown by plasma-assisted molecular beam epitaxy on m-oriented sapphire substrates is studied. SL structures consist 25 repetitions subsequently deposited ZnO and CdO layers. X-ray diffraction (XRD) transmission electron microcopy (TEM) studies confirm the presence 2D with wurtzite phase sublayers rocksalt structure sublayers. For thicker sublayers, (11̅.3) twinning was observed. periods are calculated based...
This work mainly focused on the synthesis of copper doped zinc oxide nanowires by hydrothermal method, their characterization and ultraviolet (UV) light sensing response at room temperature. The structural morphological was carried out using X-ray diffraction scanning electron microscopy. Enhanced photodetection property has been achieved for a dopant concentration 2.5wt% 5wt% showing UV photosensitivity values (photo-to-dark current ratio) around 800 1800, respectively. is an order...
In this work, we have investigated a series of CdO layers grown by the plasma-assisted molecular beam epitaxy technique on m-plane sapphire substrate. The relation between Cd and O2 parameters during growth influences stoichiometry it affects morphological, optical, electrical properties which are manifested in roughness parameter, lattice constant, optical bandgap, parameter layers. surface morphology structural were studied using atomic force microscopy X-ray diffraction respectively....
The development of CdMgO ternary alloy with a single cubic phase is challenging but meaningful work for technological advancement. In this work, we have grown series Cd1-xMgxO random alloys various Mg concentrations (x=0, 30, 32, 45, and 55%) on quartz substrate by plasma-assisted molecular beam epitaxy technique. structural investigations were performed using the X-ray diffraction decreases in average crystallite size lattice parameters observed an increase content alloys. analysis confirms...
Semiconductor superlattices have found widespread applications in electronic industries. In this work, short-period superlattice structure (SLs) composed of CdO and MgO layers was grown using the plasma-assisted molecular beam epitaxy (PA-MBE) technique. The optical property SLs investigated by absorption measurement at room temperature. ambient-pressure direct bandgap to be 2.76 eV. pressure dependence fundamental has been studied a diamond anvil cell (DAC) It that band-to-band transition...
Optical properties of the short period {CdO/ZnO} superlattices grown by plasma assisted MBE were analyzed. The superlattice (SLs) structures successfully obtained at different growth temperatures from 360 to 550 °C. Interestingly, temperature SLs influences quality multilayers and also optical these structures. After annealing 900°C rapid thermal method various defect luminescence located energetic positions, detected, intensity strongly depends on applied temperature.
The development of CdMgO ternary alloy with a single cubic phase is challenging but meaningful work for technological advancement. In this work, we have grown series Cd1-xMgxO random alloys various Mg concentrations (x = 0, 30, 32, 45, and 55%) on quartz substrate by plasma-assisted molecular beam epitaxy (PA-MBE) technique. structural investigations were performed using the X-ray diffraction (XRD) decreases in average crystallite size lattice parameters observed an increase content alloys....