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Articles 195991 - 196020 of 1113978

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Preparation And Characterization Of A-Si:H And A-Sic:H Separate P-I-N Thin Films, Ahmed Abo Arais Sep 2021

Preparation And Characterization Of A-Si:H And A-Sic:H Separate P-I-N Thin Films, Ahmed Abo Arais

International Journal of Thin Film Science and Technology

a-Si:H and a-SiC:H in undoped, buffer, p-type and n-type thin films were deposited by radio frequency (RF) glow discharge decomposition method on Croning 7059 glass substrates from silane gas (SiH4) mixed with methane (CH4) for undoped, buffer and B2H6, PH3 were added for p-type and n-type thin films respectively. Gap state defects of a-Si:H and a-SiC:H thin films for both undoped and doped types have been investigated by constant photocurrent method (CPM). The minimum defect density of a-Si:H, i-film was found to be 2.5x1016cm-3 and for undoped a-SiC:H, buffer-layer was evaluated to be 8.8x1016cm-3. There was a gradual increase in …

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Microstructural And Electrical Characterization Of Pt/Si Nanowires Schottky Diode Grown By Metal Assisted Chemical Etching Method, Bukke Naresh Naik, Lucky Agarwal, Shweta Tripathi Sep 2021

Microstructural And Electrical Characterization Of Pt/Si Nanowires Schottky Diode Grown By Metal Assisted Chemical Etching Method, Bukke Naresh Naik, Lucky Agarwal, Shweta Tripathi

International Journal of Thin Film Science and Technology

In this report, microstructural and electrical parameters have been evaluated for Pt/Si nanowires Schottky nanocontact, grown by metal-assisted chemical etching method. Schottky contact has been formed by placing a platinum conducting tip of STM at an optimized distance (in Armstrong) from the peak of SiNWs. At an optimized separation between the tip and silicon nanowires, resulting I-V characteristic shows it rectifying behaviour. Ideality factor has been evaluated as 3.7 and reverse breakdown voltage is -5V.

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Models Of Electric Transport In Bilayer Ni/Cu And In A Tri-Layer Ni/Pd/Cu Thin Films, M. K. Loudjani, C. Sella Sep 2021

Models Of Electric Transport In Bilayer Ni/Cu And In A Tri-Layer Ni/Pd/Cu Thin Films, M. K. Loudjani, C. Sella

International Journal of Thin Film Science and Technology

In this work we propose to measure the resistivities of bilayer Ni/Cu and tri-layer Ni/Pd/Cu thin films. We will compare the experimental resistivity of bilayer Ni/Cu or a tri-layerNi/Pd/Cu to the resistivity calculated from the resistivities of the simple layers of copper, nickel and palladium. We show that in the presence of aconstantelectric fieldparallel to the interface of Ni/Cu, electronic transport in bilayer, is equivalent to that of two distinct layers (of Ni and Cu) laid out in two parallel circuits, and that of a tri-layer Ni/Pd/Cu is equivalent to that the electronic transport of three distinct layers (of Ni, …

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On Analytical Prognosis Of Epitaxial Grows From Gas Phase. A Possibility To Improve Properties Of Films, E. L. Pankratov, E. A. Bulaeva. Sep 2021

On Analytical Prognosis Of Epitaxial Grows From Gas Phase. A Possibility To Improve Properties Of Films, E. L. Pankratov, E. A. Bulaeva.

International Journal of Thin Film Science and Technology

In this paper we introduce an analytical approach to calculate the distribution of velocity of flow of the gas mixture, the concentration distributions of the growth component and temperature fields in the zone of deposition of semiconductor layers in chemical vapor deposition using a reaction chamber with a rotating disk substrate holder. The results of analysis of the temperature and concentration fields in the reduced and atmospheric conditions (~ 0.1 atm.) pressure in the reaction chamber obtained based on the proposed theoretical models and have good agreement with experimental data. Results of analytical modelling have been compared with experimental data.

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Comparative Study On The Energy Conversion Efficiency Of Dye Sensitized Solar Cell Using Different Natural Dyes, Ejajul Karim, Jasim Uddin, M Saifur Rahman, M Obaidur Rahman, Mubarak A. Khan Sep 2021

Comparative Study On The Energy Conversion Efficiency Of Dye Sensitized Solar Cell Using Different Natural Dyes, Ejajul Karim, Jasim Uddin, M Saifur Rahman, M Obaidur Rahman, Mubarak A. Khan

International Journal of Thin Film Science and Technology

The Dye sensitized solar cells (DSSCs) were fabricated using natural dyes extracted from different natural dyes such as Turmeric, Carissa Carandas and Beet absorbed into a nano porous TiO2 substrate. The DSSCs provide a technically and economically credible alternate concept to present day p-n junction photovoltaic device. In contrast to the conventional silicon systems, where the semiconductor assumes both the task of light absorption and charge carrier transport the two functions are separate here. Light is absorbed by a sensitizer, which is anchored to the surface of a wide band gap oxide semiconductor charge separation takes place at the interface …

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Structural, Optical And Electrical Properties Of Green Synthesis Cdo Nanoparticles And Its Ag/Cdo/P-Si Junction Diode Fabricated Via Jns Pyrolysis Techniqu, K. Mohanraj, D. Balasubramanian, N. Jhansi, R. Bakkiyaraj, J. Chandrasekaran Sep 2021

Structural, Optical And Electrical Properties Of Green Synthesis Cdo Nanoparticles And Its Ag/Cdo/P-Si Junction Diode Fabricated Via Jns Pyrolysis Techniqu, K. Mohanraj, D. Balasubramanian, N. Jhansi, R. Bakkiyaraj, J. Chandrasekaran

International Journal of Thin Film Science and Technology

CdO nanoparticle is synthesized using green tea extract as solvent by microwave irradiation method. Its crystalline structure is confirmed by the well define peaks of powder XRD study. The surface morphology is analyzed by SEM and TEM spectrograph. The percentage composition of cadmium present in the synthesized material is confirmed by EDS study also presence of various functional groups is analysis using FTIR spectrum. The band gap energy of composed material is calculated with the help of cut off peak of diffused reflectance spectrum of UV study. The thermal conductance of the substance is increasing with increasing the temperature. The …

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A Comparative Study Of Structural And Morphological Properties Of Pristine And Mn Doped Ruthenium Oxide Thin Films., P. S. Joshi, D. S. Sutrave Sep 2021

A Comparative Study Of Structural And Morphological Properties Of Pristine And Mn Doped Ruthenium Oxide Thin Films., P. S. Joshi, D. S. Sutrave

International Journal of Thin Film Science and Technology

Mn-doped and pristine Ruthenium Oxide composite nanostructures in thin film form were prepared on stainless steel substrates by sol-gel spin coating method. The at % of Mn was increased as 0.1, 0.2, 0.5, 1 and 2 %. The X-ray diffraction study showed crystalline behaviour for both pristine and doped films with porous morphology. The variation in lattice constants for both RuO2 and MnO2 was observed with increase in doping percentage. EDAX spectrum showed the successful doping of Mn in RuO2. The infrared spectrum of as deposited pristine RuO2 thin film depicted strong absorption bands at 880.41 cm-1 and 749.52 cm-1 …

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Effect Of Substrate Temperature On Tin Disulphide Thin Films, P. Gopalakrishnan, G. Anbazhagan, , J. Vijayarajasekaran, K. Vijayakumar Sep 2021

Effect Of Substrate Temperature On Tin Disulphide Thin Films, P. Gopalakrishnan, G. Anbazhagan, , J. Vijayarajasekaran, K. Vijayakumar

International Journal of Thin Film Science and Technology

Thin films of tin disulphide (SnS2) were deposited on glass substrates by spray pyrolysis technique using precursor solutions of SnCl2.2H2O and n-n dimethyl thiourea at different substrate temperatures varied in the range 473 – 573 K. Using the hot probe technique the type of conductivity is found to be n type. X ray diffraction revealed the polycrystalline nature with increasing crystallinity with respect to the different substrate temperature. The preferrential orientation growth of compound having (002) plane belongs to the hexagonal crystal structure. The size of the crystallites was determined using FWHM values of the Bragg peaks and found to …

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Brush Plated Copper Gallium Sulphide Films And Their Properties, B. Kajamaideen, A. Panneerselvam, K. R. Murali Sep 2021

Brush Plated Copper Gallium Sulphide Films And Their Properties, B. Kajamaideen, A. Panneerselvam, K. R. Murali

International Journal of Thin Film Science and Technology

Copper gallium sulphide films were deposited for the first time by the brush plating technique at different electrolyte temperatures in the range of 30°C - 80°C and at a constant deposition current density of 5.0 mA cm-2. X-ray diffractograms of the films are single phase with chalcopyrite structure. EDAX measurements indicated that the Cu/Ga ratio decreased from 1.29 to 1.00 as the electrolyte temperature increased from 30°C - 80°C. The grain size increased with increase of electrolyte temperature. The grain size increases from 100 nm to 300 nm as the electrolyte temperature increases.

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Influence Of Copper Phthalocyanine (Cupc) Thin Layer On Capacitance-Voltage Characterization Of A Device Consisting Of Ito/Cupc/Pvk/Rhodamine B Dye Layers, Mohammed S. Al-Qrinawi, Taher M. El-Agez, Monzir S. Abdel-Latif, Sofyan A. Taya Sep 2021

Influence Of Copper Phthalocyanine (Cupc) Thin Layer On Capacitance-Voltage Characterization Of A Device Consisting Of Ito/Cupc/Pvk/Rhodamine B Dye Layers, Mohammed S. Al-Qrinawi, Taher M. El-Agez, Monzir S. Abdel-Latif, Sofyan A. Taya

International Journal of Thin Film Science and Technology

In this paper, the influence of copper-phthalocyanine (CuPc) hole-injection layer on the capacitance-voltage (CV) characteristic performance of ITO/CuPc/PVK/Rhodamine B/Pb devices was investigated. The thickness of the CuPc layer was varied form 5 nm to 50 nm. The thin films were deposited on the PVK layer by thermal vacuum deposition at 1.0 × 105 torr using MiniLab 080 system. The thicknesses were measured using using FILMETRICS F20-UVX thin-film analyzer. It was found that as the thickness of CuPc layer decreases the transition voltage (VT) and built-in voltage (Vbi) decrease except for a thickness 5 nm, which shows negative differential resistance (NDR).

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Modelling Mass And Heat Transport During Gas Phase Epitaxy In A Reactor With Rotating Substrate. On Possibility To Improve Of Properties Of Films, E.L. Pankratov, E.A.Bulaeva Sep 2021

Modelling Mass And Heat Transport During Gas Phase Epitaxy In A Reactor With Rotating Substrate. On Possibility To Improve Of Properties Of Films, E.L. Pankratov, E.A.Bulaeva

International Journal of Thin Film Science and Technology

In this paper we analysed convective diffusion processes in vertical and horizontal reactors for epitaxy from gas phase with disk substrate holder at atmosphere and low (~0.1 atmosphere) pressure. We formulate conditions to improve properties of grown structure. We introduce an analytical approach to solve equations of convective diffusion. We apply the obtained results for MOCVD of gallium arsenide. Epitaxy MOCVD could be used to growth of nanoscale semiconductor structures (quantum pits; arrays of quantum pits; structures with two-dimensional electronic gas). The same procedure could be also used to growth structures with higher dimensions.

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Effect Of Post-Annealing Treatment On Mechanical Properties Of Zno Thin Films, Vipul Bhardwaj, Rajib Chowdhury, R. Jayaganthan Sep 2021

Effect Of Post-Annealing Treatment On Mechanical Properties Of Zno Thin Films, Vipul Bhardwaj, Rajib Chowdhury, R. Jayaganthan

International Journal of Thin Film Science and Technology

The present work was focused to study nanomechanical properties of ZnO thin films deposited on different substrates (Corning Glass and Fused Quartz) using DC-sputtering. The crystallinity and microstructure are correlated with process conditions and post annealing treatment in NH3 environment, which in turn affects the mechanical performance. The structural growth accompanied a change in crystalline nature and microstructure as the substrate is altered from corning glass substrate to fused quartz at similar synthesis conditions. The post deposition annealed ZnO thin films demonstrated agglomerated particles with no clear grain boundaries having nano-cracks present in the morphology, which is attributed as NH3 …

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Structure And Electric Conductivity Of Mixed Electronic–Ionic Bi2o3-Li2o-V2o5-B2o3 Glass System, M. Shapaan Sep 2021

Structure And Electric Conductivity Of Mixed Electronic–Ionic Bi2o3-Li2o-V2o5-B2o3 Glass System, M. Shapaan

International Journal of Thin Film Science and Technology

In the present study, semiconducting glasses with composition xBi2O3-(20-x)Li2O-20V2O5-60B2O3 (0 ≤ x ≤ 15) mol % have been prepared by the conventional melt quenching technique. The glassy state of the as prepared samples is characterized using X-ray diffraction (XRD). The density and molar volume of the investigated glass system increase with increasing Bi2O3 content. The infrared spectra of these glasses are recorded over a continuous spectral range (400-4000 cm1) as an attempt to study their structure systematically. FT-IR spectroscopy data reveal that B2O3 and Bi2O3 behave as network formers and incorporated in the vitreous network as [BO3], [BO4], [BiO3], [BiO6], …

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Physical Studies In Iii-Nitride Semiconductor Alloys, Vedam Rama Murthy, Alla Srivani, G Veera Raghavaiah Sep 2021

Physical Studies In Iii-Nitride Semiconductor Alloys, Vedam Rama Murthy, Alla Srivani, G Veera Raghavaiah

International Journal of Thin Film Science and Technology

Many theoretical and experimental works are made on the wurtzite phase of indium nitride (InN), gallium nitride (GaN), aluminum nitride (AlN), and their Ternary alloys. On the other side, few experimental data exist for their cubic phases where as theoretical studies show they are performing more interesting. Inclusive depiction of III-Nitride Semiconductors is demonstrated and consequence of existent Research is emphasised. The Electrical and Optical properties of III-Nitrides from binary Semiconductors are appraised using the Principle of additivity comprising quadratic expressions. The Electrical and Optical properties learned in this group restrain Refractive index, Optical polarizability, Absorption coefficient and Energy gap. …

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The Growth Of Vapour Bubble Between Two-Phase Peristaltic Bubbly Flow Inside A Vertical Cylindrical Tube, S. A. Mohammadein, A. K. Abu-Nab Sep 2021

The Growth Of Vapour Bubble Between Two-Phase Peristaltic Bubbly Flow Inside A Vertical Cylindrical Tube, S. A. Mohammadein, A. K. Abu-Nab

International Journal of Thin Film Science and Technology

The behavior of vapour bubble in superheated liquid in a vertical cylindrical tube between two-phase flow densities is discussed under the effect of peristaltic motion of long wavelength and low Reynolds number. The mathematical model is formulated by mass, momentum, and heat equations. The problem solved analytically to estimate the growth of vapour bubbles, temperature and velocity distributions. The growth of vapour bubbles, temperature and velocity distribution proportional with the amplitude ratio, Grashof number, heat source parameter, volume rate, and inversely with density fraction. The present results of bubble growth performed lower values than that obtained by Mohammadein model (2001).

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Synthesis, Characterization And Aqueous Properties Of A Newly Prepared Lignin-Based Graft Copolymer As A Drilling Mud Additiv, Magdy A. Zahran, Ibrahim M. El-Sherbiny, Hany M. Abd El-Raheem, Moneer M. Basuni Sep 2021

Synthesis, Characterization And Aqueous Properties Of A Newly Prepared Lignin-Based Graft Copolymer As A Drilling Mud Additiv, Magdy A. Zahran, Ibrahim M. El-Sherbiny, Hany M. Abd El-Raheem, Moneer M. Basuni

International Journal of Thin Film Science and Technology

This study involves a free radical graft copolymerization of lignosulfonates (LS) with 2-propenamide (Am), propenoic acid (AA), and methylene-bis-acrylamide (MBAm) in the presence of hydrogen peroxide as the initiator to produce LS-g-p(AA-co-Am-co-MBAm) copolymer. The resulting copolymer was characterized by various techniques such as infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). Viscosity measurements of the copolymer solution, pH values, solid content, gravimetric conversion and mud properties were determined. The effect of various experimental conditions on the characteristics of the developed copolymer was also investigated. Moreover, the performance of the resulting LS-g-p(AA-co-Am-co-MBAm copolymer as a pH controlling agent for water-base mud was …

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The Effect Of Solution Ph On The Properties Of Cobalt Oxide Thin Films Prepared By Nebulizer Spray Pyrolysis Technique, M. Manickam, V. Ponnuswamy, C. Sankar, R. Suresh, R. Mariappan, J. Chandrasekaran Sep 2021

The Effect Of Solution Ph On The Properties Of Cobalt Oxide Thin Films Prepared By Nebulizer Spray Pyrolysis Technique, M. Manickam, V. Ponnuswamy, C. Sankar, R. Suresh, R. Mariappan, J. Chandrasekaran

International Journal of Thin Film Science and Technology

Single-phase cubic structured Cobalt oxide thin films were deposited on preheated glass substrates by Nebulizer Spray Pyrolysis (NSP) technique with different solution pH. The structural, optical, morphological and electrical properties were investigated. Cubic structured crystallites are detected by XRD pattern with preferential orientation along (220) direction. The transmittance of Co3O4 films increases with the increase of solution pH. The obtained bandgap values of Co3O4 films are found to be in the range 2.105 - 2.347 eV and 1.74 – 1.806 eV for higher and lower energy regions respectively. HRSEM images reveal the different morphologies like sphere-shaped particles, hexagonal shaped particles …

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Particle Size Analysis For Different Substrate Of Zns/Zno Thin Film In Cbd Technique, M. Kavitha, M. Saroja, V. Ramesh Kumar, G. Jenifer Sep 2021

Particle Size Analysis For Different Substrate Of Zns/Zno Thin Film In Cbd Technique, M. Kavitha, M. Saroja, V. Ramesh Kumar, G. Jenifer

International Journal of Thin Film Science and Technology

The studies of the semiconductor core shell nanoparticles have advanced at a rapid pace because of the fact that their optical properties can be systematically tuned by varying their sizes. ZnS/ZnO thin films were deposited on FTO and glass substrate by using chemical bath deposition (CBD) technique. The chemical baths contain the solutions to zinc acetate, thiourea, ammonia and deionized water. The deposition of the samples was prepared by 300min.The deposition parameters such as pH of the bath; deposition time, temperature etc. be optimized. The morphological analysis of thin films is studied by using Scanning Electron Microscope instruments. The SEM …

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Low Cost Cusse Thin Film By Non-Vacuum Techniques, M. A. Sangamesha, K. Pushpalatha, G. L. Shekar Sep 2021

Low Cost Cusse Thin Film By Non-Vacuum Techniques, M. A. Sangamesha, K. Pushpalatha, G. L. Shekar

International Journal of Thin Film Science and Technology

The opto-electronic properties of copper sulphide can be tuned by the controlled incorporation of selenium. In this paper we report the growth of Copper Sulpho Selenide (CuSSe) using a hybrid process involving the Chemical Bath Deposition (CBD) of CuS and Electrodeposition (ED) of selenium precursors on CuS. The incorporation of selenium affects the structural, optical and morphological properties of the resulting film, which are characterized by X-ray diffraction (XRD), UV-VIS Spectrometer and Scanning Electron Microscopy (SEM) & Atomic Force Microscopy (AFM). It is found that the incorporation of selenium resulted better crystalline structure and excellent optical properties. The SEM pictures …

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Hydrothermal Growth Of Mno2 At 95 Oc As An Anode Material, D. Vernardou, A. Kazas, M. Apostolopoulou, N. Katsarakis, E. Koudoumas Sep 2021

Hydrothermal Growth Of Mno2 At 95 Oc As An Anode Material, D. Vernardou, A. Kazas, M. Apostolopoulou, N. Katsarakis, E. Koudoumas

International Journal of Thin Film Science and Technology

The hydrothermal growth of manganese dioxide was carried out on indium tin dioxide coated glass substrates using potassium permanganate at 95 oC for 24 h and adjusting the pH solution to 3 and 4 through nitric acid. The best capacitive response was observed from the hexagonal ε-manganese dioxide at pH 4 having a specific charge of 129 ± 1 A g-1 and specific discharge capacity of 943 mAh g-1 with capacitance retention of 98 % after 500 scans at 4 A g-1 presenting high rate performance and good stability. The importance of achieving crystalline electrodes with high specific surface area …

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Fabrication And Characterization Of Nylon 6/ Mwcnts Conductive Polymer By Electrospinning Technique, Akram R. Jabur, Fadhil A. Chayad, Noor M. Jalal Sep 2021

Fabrication And Characterization Of Nylon 6/ Mwcnts Conductive Polymer By Electrospinning Technique, Akram R. Jabur, Fadhil A. Chayad, Noor M. Jalal

International Journal of Thin Film Science and Technology

Nylon 6 / with (0, 0.1, 0.2, 0.4, 0.8, 1) wt. % Multiwall Carbon Nano Tubes MWCNTs films conductive polymers were prepared by electrospinning technique. Electrical conductivity for Polymeric solution were measure, increases from (3.8 x 10-3 S/cm) for pure nylon 6 solution and increase directly with MWCNTs concentration to (10.2 x 10-3 S/cm) at 1 % MWCNTs concentration. Prepared films morphology was tested by SEM and the average fibers diameters measure statically was 140 nm. The nanofibers film show enhancing the electrical conductivity by increase MWCNTs concentration, from (2.9 x 10-9 S/cm) for pure nylon 6 film ,increased to …

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The Effect Of Air-Exposed Layer On Electrical Properties Of Cu/N-Si/Al Schottky Diodes, A. Korkut, B. Bati Sep 2021

The Effect Of Air-Exposed Layer On Electrical Properties Of Cu/N-Si/Al Schottky Diodes, A. Korkut, B. Bati

International Journal of Thin Film Science and Technology

In this work, we studied the effect of air-exposed layer on the current-voltage (I-V) capacitance versus voltage (C-V) and capacitance versus frequency (C-f) characteristics of Cu/n-Si/Al Schottky diodes. We fabricated with and without thin oxide layer Cu/n-Si/Al diodes. Firstly, n-Si wafer having (100) oriented and 15 Ω.cm resistivity was cut into eight pieces labeled Diode 1 (D1) to Diode 8 (D8). We formed the referents Cu/n-Si/Al Schottky diode (D1) which has not exposed to air. Rest of the samples, before formation of Schottky contact, was exposed to clean air at the room temperature for 2, 4, 8, 16, 32, 48 …

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Dyes Extracted From The Seeds Of Eruca Sativa, Nigella Sativa And Ammi Visnaga As Photosensitizers For Dye-Sensitized Solar Cells, Taher M. El-Agez, Hatem Ghamri, Amal Batniji, Wael A. Tabaza, Monzir S. Abdel-Latif, Sofyan A. Taya Sep 2021

Dyes Extracted From The Seeds Of Eruca Sativa, Nigella Sativa And Ammi Visnaga As Photosensitizers For Dye-Sensitized Solar Cells, Taher M. El-Agez, Hatem Ghamri, Amal Batniji, Wael A. Tabaza, Monzir S. Abdel-Latif, Sofyan A. Taya

International Journal of Thin Film Science and Technology

In this work, the extracts of three natural dyes obtained from the seeds of Eruca Sativa, Nigella sativa, and Ammi visnaga were used as photosensitizers for dye-sensitized solar cells (DSSCs). Dye Extraction was carried out before and after grinding the plant seeds. TiO2 nanopowder was used as a semiconducting material. The UV-Vis absorption spectra of the extracts of the seeds of Eruca Sativa, Nigella sativa, and Ammi visnaga in ethyl alcohol solution and the current-voltage characteristic curves of the fabricated DSSCs were measured. The energy gaps of the extracted dyes were estimated. The best response was obtained for the DSSC …

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Effect Of Plasma Focusing Shots On Structural And Optical Properties Of Zn0.9co0.1o Thin Films, E. R. Shaaban, Gamal El-Kashef, F. Diab, A. S. Ali Sep 2021

Effect Of Plasma Focusing Shots On Structural And Optical Properties Of Zn0.9co0.1o Thin Films, E. R. Shaaban, Gamal El-Kashef, F. Diab, A. S. Ali

International Journal of Thin Film Science and Technology

A Zn0.9Co0.1O nanoparticles was made by a homogeneous precipitation method. Thin films of the same thickness of Zn0.9Co0.1O were deposited onto highly cleaned glass substrates by the thermal evaporation technique using modified source. Thin films of the same thickness have been exposed to plasma focusing with 0, 5, 10 and 15 shots. The structural characteristics of Zn0.9Co0.1O films were examined by X-ray diffraction (XRD) and scan electron microscope (SEM) before and after plasma focusing shots. The microstructure parameters, crystallites size and lattice strain have been found to reduce with increasing the plasma focusing shots. The optical properties were studied from …

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Effects Of Annealing And Oxygen/Nitrogen Ratio On Transmittance Of Copper Oxynitride Thin Films, Abraham Kirwa Tuwei, Daniel Kipngetich Ketui, Samson Muriuki Njogu Sep 2021

Effects Of Annealing And Oxygen/Nitrogen Ratio On Transmittance Of Copper Oxynitride Thin Films, Abraham Kirwa Tuwei, Daniel Kipngetich Ketui, Samson Muriuki Njogu

International Journal of Thin Film Science and Technology

Copper oxynitride (CuOyNx) thin films were deposited on glass substrates by dc reactive magnetron sputtering at room temperature and a pressure of 5 x 10-3 mbar with varying oxygen and nitrogen concentrations concurrently on each film for 10 minutes. The oxygen concentration was increased from 2 sccm, 4 sccm, 6 sccm, 8 sccm and 10 sccm while that of nitrogen was reduced from 8 sccm, 6 sccm, 4 sccm, 2 sccm and 0 sccm. The copper oxynitride thin films formed were annealed at 200 0C and 300 0C and their optical properties measured. We observed that at oxygen to nitrogen …

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Investigation Of Electrical And Optical Transport Properties Of Annealed Inox Thin Films, Md. Ariful Islam, R. C. Roy, J. Hossain, M. Julkarnain, K. A. Khan Sep 2021

Investigation Of Electrical And Optical Transport Properties Of Annealed Inox Thin Films, Md. Ariful Islam, R. C. Roy, J. Hossain, M. Julkarnain, K. A. Khan

International Journal of Thin Film Science and Technology

Indium oxide (InOx) films with a thickness of 50–150 nm were deposited onto glass substrate by electron beam evaporation technique. As-deposited InOx films were annealed in air at 575K for 3 hours and characterized by Scanning Electron Microscopy (SEM), electrical and optical measurements. SEM study of the film of thickness 50 nm revealed that the surfaces are distributed uniformly throughout the film with the uniform small grains. Temperature dependence of electrical resistivity was measured in the temperature range 300-475K. The decrease in resistivity with the increase of temperature indicates that InOx films are semiconducting in nature. The reduction in the …

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Compound Semiconductor Epitaxial Growth Techniques, Md. Momtazur Rahman, Md. Nazmul Hasan Sep 2021

Compound Semiconductor Epitaxial Growth Techniques, Md. Momtazur Rahman, Md. Nazmul Hasan

International Journal of Thin Film Science and Technology

The aim of this paper is to review the different growth techniques used for compound semiconductor epitaxial layer growth, including LPE, HVPE, MOVPE, MOCVD, MBE & their reasonable comparison. As the compound semiconductor have elegant characteristics, so recently different semiconductor and its alloys becoming great importance in many applications due to its variable band gap properties. We can change its properties by changing temperature, doping & carrier concentration, & most importantly the performance of semiconductor devices strongly dependent on precious control of growth techniques. So, the choice of efficient growth techniques by accumulating with the proper doping we can get …

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Study Of The Effect Of Annealing On Optical Properties Of Znfe2o4 Films Prepared By Chemical Spray Pyrolysis Method, Sabah A. Salman, Nabeel A. Bakr, Rusul K. Ismail Sep 2021

Study Of The Effect Of Annealing On Optical Properties Of Znfe2o4 Films Prepared By Chemical Spray Pyrolysis Method, Sabah A. Salman, Nabeel A. Bakr, Rusul K. Ismail

International Journal of Thin Film Science and Technology

Zinc Ferrite (ZnFe2O4) thin films have been deposited by chemical spray pyrolysis method with thickness of (500 nm) on glass substrates at temperature of (400 ?C) using Zinc Nitrate and Ferric Nitrate as Zinc and Iron sources respectively. The effect of annealing with different temperatures (450 and 500) oC for (2h) on the optical properties for all prepared films was studied. The optical properties for all the films were studied by recording the transmittance and absorbance spectra in the range of (300 - 900) nm. The results showed that the energy band gap for allowed direct electronic transition varies from …

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Simulating Effect Of Ferroelectric Nanofiller Shape On Charge Transport In Nanocomposite Film, Meng H. Lean, Wei-Ping L. Chu Sep 2021

Simulating Effect Of Ferroelectric Nanofiller Shape On Charge Transport In Nanocomposite Film, Meng H. Lean, Wei-Ping L. Chu

International Journal of Thin Film Science and Technology

Bipolar charge injection and field-dependent mobility transport through nanocomposite film comprised of various shapes of ferroelectric nanofillers in an amorphous polymer matrix is simulated using a self-consistent 3D particle-in-cell model. The classical electrical double layer is extended by substitution of a dipolar core for the nanofiller. Metal-polymer charge injection assumes Schottky emission and Fowler-Nordheim tunneling, migration with field-dependent Poole-Frenkel mobility, and recombination with Monte Carlo selection. A boundary integral equation method solves the Poisson equation coupled with a second-order predictor-corrector scheme for time integration of the equations of motion. The stability criterion of the explicit algorithm conforms to the Courant-Friedrichs-Levy …

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Preparation And Characterization Of Tin Oxide Based Transparent Conducting Coating For Solar Cell Application, Komol Kanta Sharker, Mubarak A. Khan, Shauk M. M. Khan, Rafiqul Islam Sep 2021

Preparation And Characterization Of Tin Oxide Based Transparent Conducting Coating For Solar Cell Application, Komol Kanta Sharker, Mubarak A. Khan, Shauk M. M. Khan, Rafiqul Islam

International Journal of Thin Film Science and Technology

Transparent conducting coatings for solar cell application have been the subject of research over a number of years. The transparent conducting coatings were prepared by oven drying process on glass plates at various temperatures and various concentrations of the starting material stannous chloride (SnCl2.2H2O). Structural, morphological, optical, and electrical properties of the resulting plates were studied by XRD, Inverted Microscope, UV Visible and Hall Effect Measurement method. XRD showed a homogenous morphology of the coating. The minimum grain size of SnO2 was found to be 22 nm as calculated by XRD using Debye Scherrer Formula. The change in electrical conductivity …

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