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Articles 196081 - 196110 of 1113965

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Design And Fabrication Of Broadband Dielectric Mirrors In The Visible Range, Ali Jebelli, Hicham Chaoui, Hossein Kazemi, Arezoo Mahabadi, Balbir Dhillon Sep 2021

Design And Fabrication Of Broadband Dielectric Mirrors In The Visible Range, Ali Jebelli, Hicham Chaoui, Hossein Kazemi, Arezoo Mahabadi, Balbir Dhillon

International Journal of Thin Film Science and Technology

A broadband dielectric mirror in the visible spectrum is made by putting together two quarter-wavelength stacks with two different reference wavelengths, and for smoothing the mirror’s spectrum, the gradient algorithm has been used. This mirror consists of 39 layers that have been fabricated by alternative deposition of zinc sulfide and Cryolite, using vacuum thermal evaporation on a glass substrate. The Mirror’s reflectance spectrum was measured and it was found close to ideal state.

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Fabrication And Characterization Of Cobalt Pigmented Anodized Zinc For Photocatalytic Application, Judith Chebwogen, Onesmus Munyati, Sylvester Hatwaambo, Mghendi Mwamburi, Christopher Maghanga Sep 2021

Fabrication And Characterization Of Cobalt Pigmented Anodized Zinc For Photocatalytic Application, Judith Chebwogen, Onesmus Munyati, Sylvester Hatwaambo, Mghendi Mwamburi, Christopher Maghanga

International Journal of Thin Film Science and Technology

ZnO is an n-type oxide semiconductor with a direct wide band gap greater than 3 eV. Like any other semiconductor, the optical and electrical characteristics can be influenced by doping or adjusting process conditions which broaden its applications. In this work, varying amounts of Cobalt (0.01g-0.04g) were electrodeposited on anodized Zinc thin films (ZnO) followed by heat treatment to about 2500C. Optical characterization was performed in the range 300-2500 nm to obtain reflectance data which aided in defining the absorption coefficient and band gap of the films. Photocatalytic activity of the films was explored in Methylene Blue solution degradation under …

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Influence Of Sintering Temperature On Ferroelectric Ba0.7sr0.3tio3 Microstructure, Grain Size, And Electrical Properties, Iqbal S. Naji, Hamed A. Gatea Sep 2021

Influence Of Sintering Temperature On Ferroelectric Ba0.7sr0.3tio3 Microstructure, Grain Size, And Electrical Properties, Iqbal S. Naji, Hamed A. Gatea

International Journal of Thin Film Science and Technology

Barium strontium titanate is a ferroelectric material that is currently attracting much attention because it has high dielectric constant, low dissipation factor, tunable dielectric constant at microwave frequencies, and low-leakage current.The Ba0.7Sr0.3TiO3 compound studied in the present paper was synthesised using sol-gel method. The ferroelectric Ba0.7Sr0.3TiO3 was prepared using the sol-gel method, with barium and strontium acetate as a source for Ba and Sr as well as Ti(IV) isopropoxide as a source for Ti. The solvent used in this paper was acetic acid whereas 2- methoxyethanol has was used a stabiliser for Ti (IV) isopropoxide. Moreover, the effect of changing …

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Controlled Synthesis And Characterization Of Lanthanum Nanorods, Jayadeep Tejani, Rahul Shah, Hiral Vaghela, Shailesh Vajapara, Amanullakhan Pathan Sep 2021

Controlled Synthesis And Characterization Of Lanthanum Nanorods, Jayadeep Tejani, Rahul Shah, Hiral Vaghela, Shailesh Vajapara, Amanullakhan Pathan

International Journal of Thin Film Science and Technology

The present paper addresses the synthesis and characterization of La2O3Nano rods using Precipitation Method. We use Acetamide as fuel, CTAB as Surfactant and DMF as solvent in precipitation method. FTIR spectroscopy was done for observing the presence of La-O bond. The synthesized lanthanum oxide nanoparticles were characterized by X-ray diffraction (XRD), Raman Spectra, field emission gun Scanning Electron Microscopy (FEG-SEM) with EDS spectra and High resolution Transmission Electron Microscopy (HR-TEM) for morphological percentage of metal and particle size determination. In XRD analysis, the average nanorods sizes were near 38 nm. The lanthanum nano-rods prepared by Precipitation Method are thick and …

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A Two-Dimensional (2d) Analytical Model For Sub-Threshold Current And Sub-Threshold Swing For Short Channel Triple Material Gate-Double Halo (Tmg-Dh) Dg Mosfet, Anshika Srivastava, Richa Singh, Shweta Tripathi Sep 2021

A Two-Dimensional (2d) Analytical Model For Sub-Threshold Current And Sub-Threshold Swing For Short Channel Triple Material Gate-Double Halo (Tmg-Dh) Dg Mosfet, Anshika Srivastava, Richa Singh, Shweta Tripathi

International Journal of Thin Film Science and Technology

In this work, an analytical model for sub-threshold conduction parameters has been demonstrated for short- channel Triple Material Gate-Double Halo (TMG-DH) DG MOSFET. For sub-threshold current and sub-threshold swing models, we have utilized drift-diffusion current density equation with virtual cathode concept of DG MOSFETs. The influence of double halo technique over gate length ratio of the three channel regions under three dissimilar gate materials of the device has been investigated in depth in terms of sub-threshold current and sub-threshold swing. Also, the reliance of sub-threshold current and sub-threshold swing on different device constraints has been scrutinized. Furthermore, the problem solving …

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Tco’S Thin Films Grown By Spray Pyrolysis Technique For Window Layer Of Solar Cell Application: A Comparative Study, M. N. Amroun, K. Salim, A. H. Kacha, M. Khadraoui Sep 2021

Tco’S Thin Films Grown By Spray Pyrolysis Technique For Window Layer Of Solar Cell Application: A Comparative Study, M. N. Amroun, K. Salim, A. H. Kacha, M. Khadraoui

International Journal of Thin Film Science and Technology

Thin films of ZnO, SnO2 and CdO have been deposited using spray pyrolysis technique. They were characterized by X-Ray diffraction (XRD), optical absorption in the wavelength range 200-2500 nm and Hall Effect measurements. A comparative study was conducted for the prepared TCO’s thin films. The structural studies revealed the formation of polycrystalline thin films with a hexagonal wurtzite and tetragonal rutile structure for ZnO and SnO2 thin films respectively, whereas a cubic structure was found for the CdO films. Optical studies showed that the prepared SnO2, ZnO and CdO thin films had a direct band gap of 3.72, 2.98 and …

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Investigations In Structural Morphological And Optical Properties Of Cd1-Xsnxs Thin Films, M. N. Amroun, A. H. Kacha, K. Salim, M. Khadraoui Sep 2021

Investigations In Structural Morphological And Optical Properties Of Cd1-Xsnxs Thin Films, M. N. Amroun, A. H. Kacha, K. Salim, M. Khadraoui

International Journal of Thin Film Science and Technology

Cd1_xSnxS thin films with different concentrations x (x= 0 at%, 2 at%, 4 at%, 6 at% and 8 at %) were grown onto the glass substrates using spray pyrolysis technique. The structural, morphological and optical properties of pure CdS (x=0) and Cd1_xSnxS ternary alloy thin films for different concentrations x were investigated. X-ray diffraction study showed that the deposited films were polycrystalline with hexagonal structure and the crystallinity of the CdS films has improved with Sn incorporation. The morphological and compositional properties of the deposited films have been investigated using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). SEM …

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Effective Analysis For Usability Of Applications Software, Sarmad Mohammad Sep 2021

Effective Analysis For Usability Of Applications Software, Sarmad Mohammad

International Journal of Thin Film Science and Technology

The main objective of this research is to determine the degree of usage for specific applications software, project management (PM) software has been taken as a case study in order to develop and enhance usability of PM software in Kingdom of Bahrain. This study also aims to find out new approach to make the use of project management more effective and efficient as possible. It has started with overview of the framework of project management and the current way to deal with project software. Functionality versus complexity and SWOT analysis are conducted to find out the weak point in the …

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Enhanced Activity Of Chemically Synthesized Nanorod Mn3o4 Thin Films For High Performance Supercapacitors, P. Immanuel, G. Senguttuvan, K. Mohanraj Sep 2021

Enhanced Activity Of Chemically Synthesized Nanorod Mn3o4 Thin Films For High Performance Supercapacitors, P. Immanuel, G. Senguttuvan, K. Mohanraj

International Journal of Thin Film Science and Technology

The present study addresses a cost effective method for fabricating high performance and flexible supercapacitor based on the transition metel oxides of Mn3O4 thin films. The Mn3O4 prepared by SILAR method at different cycles such as 25, 50, 75 and 100 cycles. The prepared Mn3O4 thin films were characterized by means of structural, morphological and electrochemical studies. The structural studies of X-ray diffraction (XRD) reveal that 75 cycles have good crystalline nature with tetrahedral structure. Fourier transform infrared spectroscopy (FTIR) indicates the functional group of Mn-O. Raman spectra indicate the formation of Mn3O4 thin films. SEM analysis depicted that Mn3O4 …

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Effect Of Dyes Nano-Material Electrodes For Exploration Of Dye- Sensitized Solar Cells, Da Oeba, Co Mosiori Sep 2021

Effect Of Dyes Nano-Material Electrodes For Exploration Of Dye- Sensitized Solar Cells, Da Oeba, Co Mosiori

International Journal of Thin Film Science and Technology

The demand for suitable thin films and photoelectric electrodes for renewable and sustainable energy constantly grows. In the exploration of dye-sensitized solar cells (DSSC) recent and increased involvement in the application of nanomaterial-based electrodes and the effects of their unique electronic properties has grabbed the attention of several researchers. This was an attempt to contribute to the investigation by using different dyes on TiO nanoparticles.

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Analytical Modelling And Simulation Of Highly Sensitive N- Radfet Dosimeter, Srijan Pathak, Spriha Singh, Tanya Jha, Ankush Agrawal, Shweta Tripathi Sep 2021

Analytical Modelling And Simulation Of Highly Sensitive N- Radfet Dosimeter, Srijan Pathak, Spriha Singh, Tanya Jha, Ankush Agrawal, Shweta Tripathi

International Journal of Thin Film Science and Technology

In the present paper, we have developed a model of a n-RADFET dosimeter device. Moreover, the study has addressed the effects of ionizing radiation on the surface potential and threshold voltage characteristics of the device. In addition, a detailed simulation analysis of the device has been conducted to obtain some further results. The study indicated that high sensitivity can be obtained for RADFET using n-MOSFET device. The results are expected to benefit in establishing the effectiveness of n-RADFET device as a dosimeter.

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Cross Sectional Tem Characterization Of Epitaxial Silicon Film Grown Using Hot Wire Chemical Vapor Deposition, M. Abul Hossion, B. M. Arora Sep 2021

Cross Sectional Tem Characterization Of Epitaxial Silicon Film Grown Using Hot Wire Chemical Vapor Deposition, M. Abul Hossion, B. M. Arora

International Journal of Thin Film Science and Technology

We have investigated epitaxial growth of poly crystalline intrinsic silicon film grown on glass and Si/SiO2 substrate using hot wire chemical vapour deposition technique. We have grown 20 nm nucleation layer at 400°C followed by an epitaxial growth of 200 nm thick at 600°C. Than 800 nm thick layer was grown on top using high hydrogen silane ratio of 15:5. Hydrogen soaking was performed for well passivated film. Evaluation of different layers was performed using cross sectional transmission electron microscopy. Poly crystalline as well as epitaxial and columnar growth regions were well observed.

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Chemical Deposition Of Polycrystalline Znse Thin Films From Malonic Acid Solution: Nucleation And Growth Mechanism, Structural, Optical And Electrical Studies, P. A. Chate, D. J. Sathe, U. B. Sankpal Sep 2021

Chemical Deposition Of Polycrystalline Znse Thin Films From Malonic Acid Solution: Nucleation And Growth Mechanism, Structural, Optical And Electrical Studies, P. A. Chate, D. J. Sathe, U. B. Sankpal

International Journal of Thin Film Science and Technology

Zinc selenide (ZnSe) polycrystalline semiconductor thin films have been synthesized adopting dip method in malonic acid solution. The formations of nucleus and growth process of this technique have been investigated. The XRD pattern shows a characteristic cubic structure with a (111) crystallographic preferred orientation. SEM studies reveal that grains are uniformly dispersed on the surface of the substrates. The optical energy gap was 2.80 eV. The activation energies are 0.053 and 0.317 eV for low and high temperature region, respectively obtained.

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Nano Structural Properties Of Lead Doped Cadmium Sulfide (Cd1-Xpbxs) Thin Films Deposited By Spray Pyrolysis Technique, Ranojit Kumar Dutta Sep 2021

Nano Structural Properties Of Lead Doped Cadmium Sulfide (Cd1-Xpbxs) Thin Films Deposited By Spray Pyrolysis Technique, Ranojit Kumar Dutta

International Journal of Thin Film Science and Technology

Lead doped cadmium sulfide thin films Cd1-xPbxS (0 ≤ x ≥ 0.20) were deposited onto a glass substrate at a temperature of 523K at a low cost spray pyrolysis technique. They were characterized by their structural and optical properties energy dispersive x-ray analysis, scanning electron microscopy and x-ray diffraction. X-ray diffraction patterns of the films are identified as (100), (002), (101), (102), (110), (103) and (201) planes which have hexagonal crystal structure. No extra peak developing occurs with the increasing Pd concentration. The direct band gap energy of the film depends on the concentration. This value varies from 2.52 eV …

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Effect Of Tm (Tm= Sn, Mn, Al) Doping On The Physical Properties Of Zno Thin Films Grown By Spray Pyrolysis Technique: A Comparative Study, M. N. Amroun, K. Salim, A. H. Kacha, M. Khadraoui Sep 2021

Effect Of Tm (Tm= Sn, Mn, Al) Doping On The Physical Properties Of Zno Thin Films Grown By Spray Pyrolysis Technique: A Comparative Study, M. N. Amroun, K. Salim, A. H. Kacha, M. Khadraoui

International Journal of Thin Film Science and Technology

ZnO:TM (TM=Sn, Mn, Al) thin films were successfully deposited on glass substrates using spray pyrolysis technique. X-ray analysis shows that ZnO:TM thin films crystallize in hexagonal structure with a preferred orientation of the crystallites along (002) direction and the crystallite size had increased with TM doping. The present study investigated the effect of TM type on the structural parameters. These films had direct band gap energy lying in the range of 3 – 2.25 eV and the average transmittance varied from 75 to 85 % with TM doping. The lowest observed figure of merit in the present study is 4.13×10-5 …

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Characterization Of Spray Pyrolysised Nano Tin Disulphide Thin Film, J. Vijayarajasekaran, P. Gopalakrishnan, L. Amalraj, K. Vijayakumar Sep 2021

Characterization Of Spray Pyrolysised Nano Tin Disulphide Thin Film, J. Vijayarajasekaran, P. Gopalakrishnan, L. Amalraj, K. Vijayakumar

International Journal of Thin Film Science and Technology

Tin disulphide (SnS2) thin film has been prepared on glass substrate by chemical spray pyrolysis technique using the precursor solutions of tin (IV) chloride and thiourea, which were atomized with compressed air as carrier gas. Thin layer of SnS2 film has been grown at lower thermal energy of 473 K. The Structural properties have been analyzed by X- ray diffraction (XRD) and surface morphology by SEM micrograph. The optical properties of the thin film deposited were obtained using experimentally recorded transmission spectral data as functions of the wavelength, in the range of 400– 800 nm. Analysis of the spectral absorption …

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Structural, Optical And Gas Sensing Properties Of Tio2-Moo3 Thin Films, P. V. Kala, B. T. Rao, K. Srinivasarao Sep 2021

Structural, Optical And Gas Sensing Properties Of Tio2-Moo3 Thin Films, P. V. Kala, B. T. Rao, K. Srinivasarao

International Journal of Thin Film Science and Technology

Thin films of TiO2 - MoO3 were deposited on quartz glass, Silicon (100) substrates by dc magnetron sputtering at two substrate temperatures of 300 K and 600 K and at a fixed sputtering pressure of 5 Pa and sputtering power of 50 W respectively. The atomic percent of (at.%) titanium (Ti) in composite is found to be 1 and 2.4. The deposited films were characterized by X-ray Photo Electron Spectroscopy (XPS) and Optical Transmittance studies. The optical transmittance of the MoO3 films deposited at 300 K, 5 Pa is 60 % and increases with increasing Ti at.%. The energy gap …

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Effect Of Annealing Temperature On Structural, Optical And Electrical Properties Of Spin Coated Tin Oxide Thin Films For Solar Cells Application, Oluwaseunadedokun, Victoria Mofoluke Odebunmi, Yekinni Kolawole Sanusi Sep 2021

Effect Of Annealing Temperature On Structural, Optical And Electrical Properties Of Spin Coated Tin Oxide Thin Films For Solar Cells Application, Oluwaseunadedokun, Victoria Mofoluke Odebunmi, Yekinni Kolawole Sanusi

International Journal of Thin Film Science and Technology

Transparent Conducting Oxide (TCO) thin films are materials of significance for their applications in optoelectronics and sun powered cells. This paper reports the impact of annealing temperature on structural, optical and electrical properties of tin oxide (SnO2) thin films for solar cells application. The sol-gel was prepared from anhydrous stannous chloride, SnCl2 as precursor, 2-methoxyethanol as a solvent and di-ethanolamine as stabilizer. The thin film was deposited on glass substrates by means of spin coater at the rate of 2000rpm for 40 seconds. After pre-heated at 200oC, the samples were annealed at 300, 400, 500 and 600oC for 2 hours …

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Improved Refractory Aluminosilicate Bricks Through Nano Zirconia Additions, N. M. Khalil, Yousif Algamal, Qaid M.Saleem, Kamal A. Aly, M. M. S. Wahsh Sep 2021

Improved Refractory Aluminosilicate Bricks Through Nano Zirconia Additions, N. M. Khalil, Yousif Algamal, Qaid M.Saleem, Kamal A. Aly, M. M. S. Wahsh

International Journal of Thin Film Science and Technology

The physico-mechanical and refractory properties of refractory bricks, prepared from 50 wt.% kaolin and 50 wt.% alumina, were improved through the addition of different contents (2, 4, 6, 8 and 10 wt. %) of nano zirconia powder. The densification parameters (bulk density and apparent porosity), mechanical properties (cold crushing strength) and refractory properties (thermal shock resistance) were tested for the prepared refractory bricks fired at 1500 oC. The mineralogical composition of the prepared zirconia and the refractory bricks were followed by X-ray diffraction analysis (XRD) whereas while their microstructure and chemical constituents were depicted using scanning electron microscope attached with …

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Effect Of W Doping On Nio Thin Films And Its Optical, Morphological And Diode Characteristics, Saju Joseph, O. N. Balasundaram Sep 2021

Effect Of W Doping On Nio Thin Films And Its Optical, Morphological And Diode Characteristics, Saju Joseph, O. N. Balasundaram

International Journal of Thin Film Science and Technology

In this work, we demonstrate the preparation of simple and inexpensive spray route for the preparation of pure and W doped NiO thin films on the quartz glass plates. The microstructure and morphological properties were investigated using an X-ray diffraction and Scanning electron microscopic (SEM) studies. SEM images notify the presence of hollow sphere and the energy dispersive spectrum confirms the existence of both Ni and W in the prepared films. Electrical properties were investigated by two probe conductivity studies. In addition to these studies (n-Si/NiO/Au and n- Si/W:NiO/Au) diodes were fabricated and their chattels were deliberated.

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Effect Of Annealing On Hardness And Elastic Modulus Of Invar36 Thin Films Deposited By Direct Current Sputtering For Strain Gauge Applications, H. M. Kalpana, V. Siddeswara Prasad, T. N. Satish Sep 2021

Effect Of Annealing On Hardness And Elastic Modulus Of Invar36 Thin Films Deposited By Direct Current Sputtering For Strain Gauge Applications, H. M. Kalpana, V. Siddeswara Prasad, T. N. Satish

International Journal of Thin Film Science and Technology

Invar36 thin film was deposited at room temperature on p-type silicon (100) substrates using DC magnetron sputtering technique. In order to investigate the post-annealing effect on the structural characteristics and mechanical properties of the prepared films, they were vacuum annealed for one hour at different temperatures viz. 200°C, 400°C and 500°C. Composition analysis, phase structure, microstructure and roughness of as-deposited and annealed Invar36 thin films were investigated by energy dispersive X-ray analysis (EDX), X-Ray diffraction (XRD) and Atomic Force Microscopy (AFM). Mechanical properties of Invar36 thin films were studied by nano indentation method. EDX analysis revealed a variation in nickel …

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5 Gbps P-I-N Vs. Avalanche Photo Diode: Performance Analysis In Optical Communication, Md. Mashrur Islam, Maher Mostofa Kamal, Anisul Islam Sep 2021

5 Gbps P-I-N Vs. Avalanche Photo Diode: Performance Analysis In Optical Communication, Md. Mashrur Islam, Maher Mostofa Kamal, Anisul Islam

International Journal of Thin Film Science and Technology

The fiber optic technology has been in our lives for a while now. It eases the communication and the transmission of information and it becomes more and more indispensable, especially in the business world. Pin and APD are two different types of photodiodes used in optical communication systems. In this paper, a performance comparison of the conventional PIN photodiode with the Avalanche Photodiode (APD) in an optical communication system is presented. We considered 5 Gbps PIN and APD photo diodes for this purpose. We analyzed bit error rate (BER) and Q factor to achieve this goal. We found that 5 …

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Optical And Electrical Properties Of Cds: B Thin Film Deposited By Chemical Bath Deposition For Photovoltaic Application., Duke Ateyh Oeba Sep 2021

Optical And Electrical Properties Of Cds: B Thin Film Deposited By Chemical Bath Deposition For Photovoltaic Application., Duke Ateyh Oeba

International Journal of Thin Film Science and Technology

Globally, there is a high demand for clean, sustainable and renewable energy for domestic and industrial use. Conventional photovoltaic cell technology relies heavily on crystalline silicon wafers which render silicon-based solar cells expensive due to the initial cost of production and required complex deposition methods. Due to these challenges, great research interest is now directed towards thin-film solar cells. In this work, chemical bath deposition (CBD) method was chosen in the preparation of boron doped cadmium sulphide (CdS: B) thin film onto a glass slide substrate. The prepared CdS: B thin films were characterized and optimized as a window layer …

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Ion Source Plasma Parameters Measurement Using Langmuir Probe, Hikmat A. Hamad, Haitham M. Farok Sep 2021

Ion Source Plasma Parameters Measurement Using Langmuir Probe, Hikmat A. Hamad, Haitham M. Farok

International Journal of Thin Film Science and Technology

In this work, we present the experimental results of plasma parameters using a Freeman type ion source, such as electron number density ne, plasma electron temperature Te, floating potential Vf, and plasma potential VS. The measurements of these basic parameters of pure Ar plasma were done with a cylindrical Langmuir probe situated perpendicular to a relatively weak magnetic field, B = 20 mT and were performed under constant low Ar pressure 4.6 × 10-3 mbar. Different methods were implemented to calculate the electron and ion densities. We have concluded that some of these methods are subjected to significant inaccuracy, mainly …

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Prostate Volume Measurement Using Image Matching, Sarmad Mohammad, Abdulrahman Al-Awadhi Sep 2021

Prostate Volume Measurement Using Image Matching, Sarmad Mohammad, Abdulrahman Al-Awadhi

International Journal of Thin Film Science and Technology

The main objective of this research is to measure the abnormality of the prostate using image matching techniques by cross correlation to compare the volume of the a reference normal case and patient abnormal prostate enlargement volume case, in order to compute the amount of prostate volume enlargement ratio which represents an approximate amount of prostate volume enlargement and may be used by specialist as a diagnostics tool for farther patient treatment. So the specialist can measure patient prostate irregularity using this approach after overlapping and matching volume enclosed by patient abnormal case with volume of the normal case as …

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Low Cost And Sol-Gel Processed Earth Abundant Cu2znsns4 Thin Film As An Absorber Layer For Solar Cell: Annealing Without Sulfurization, Afrina Sharmin, M. S. Bashar, Samia Tabassum, Zahid Hasan Mahmood Sep 2021

Low Cost And Sol-Gel Processed Earth Abundant Cu2znsns4 Thin Film As An Absorber Layer For Solar Cell: Annealing Without Sulfurization, Afrina Sharmin, M. S. Bashar, Samia Tabassum, Zahid Hasan Mahmood

International Journal of Thin Film Science and Technology

A low cost technique has been introduced to fabricate the absorber layer of a solar cell. Copper Zinc Tin Sulfide (Cu2ZnSnS4 or CZTS) thin film have been deposited on soda lime glass substrates by a spin coater and annealed in air with different temperature varied from 300-500° C. The effect of annealing temperature on structural, optical, electrical, morphological and compositional properties has been studied. The XRD study depicts that sharpness of the peak increases with annealing temperature. The major peaks are observed at 28.74o, 47.7o and 56.6o with (112), (220) and (312) plane. Optical studies show relatively high absorption co-efficient …

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Effect Of W Doping On Nio Thin Films And Its Optical, Morphological And Diode Characteristics, Saju Joseph, O. N. Balasundaram Sep 2021

Effect Of W Doping On Nio Thin Films And Its Optical, Morphological And Diode Characteristics, Saju Joseph, O. N. Balasundaram

International Journal of Thin Film Science and Technology

In this work, we demonstrate the preparation of simple and inexpensive spray route for the preparation of pure and W doped NiO thin films on the quartz glass plates. The microstructure and morphological properties were investigated using an X-ray diffraction and Scanning electron microscopic (SEM) studies. SEM images notify the presence of hollow sphere and the energy dispersive spectrum confirms the existence of both Ni and W in the prepared films. Electrical properties were investigated by two probe conductivity studies. In addition to these studies (n-Si/NiO/Au and n- Si/W:NiO/Au) diodes were fabricated and their chattels were deliberated.

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Spray Deposition And Characterization Of P-Type Li Doped Nio Thin Films, S. Mani Menaka, G. Umadevi, A. Uma Maheswari Sep 2021

Spray Deposition And Characterization Of P-Type Li Doped Nio Thin Films, S. Mani Menaka, G. Umadevi, A. Uma Maheswari

International Journal of Thin Film Science and Technology

Undoped and lithium doped nickel oxide (Li doped NiO) thin films have been prepared onto glass substrates at 450 °C by chemical spray pyrolysis technique. The effect of lithium (Li) concentrations on the structural, optical, photoluminescence and electrical properties of the Li doped NiO films were studied by X-ray diffraction (XRD), UV-vis- NIR spectrophotometer, Photoluminescence (PL) spectrophotometer, Hot probe and Hall effect measurement system. The PL results confirmed that the band gap reduces when the lithium concentration increases. The structural properties of undoped and Li doped NiO films showed polycrystalline cubic structure. The optical transmittance and band gap values of …

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Performance Analysis Of 2.5 Gbps Pin And Apd Photodiodes To Use In Free Space Optical Communication Link, Md. Mashrur Islam, Shahriar Ahmed, Anisul Islam Sep 2021

Performance Analysis Of 2.5 Gbps Pin And Apd Photodiodes To Use In Free Space Optical Communication Link, Md. Mashrur Islam, Shahriar Ahmed, Anisul Islam

International Journal of Thin Film Science and Technology

Ever since ancient times, people had a principle need to communicate with one another. This need created interests in device based communication system for sending messages from one distant place to another. Optical communication methods were of special interest among the many systems. In this paper, investigation has been done on two different photodiodes PIN and APD for use as a receiver in free space fiber optical link. We have considered 2.5 Gbps PIN and APD photo diodes for our experiment. From the simulation, we found that APD with single mode fiber gives the better performance over PIN. However, the …

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Study Of Nickel Silicide Formed By Ion Beam Mixing, Ayache Rachid Sep 2021

Study Of Nickel Silicide Formed By Ion Beam Mixing, Ayache Rachid

International Journal of Thin Film Science and Technology

The formation of Ni silicides has been successfully synthesized by ion beam mixing. Thin nickel films were deposited by electron beam evaporation to a thickness of 50 nm on crystalline silicon (c-Si). After deposition, the films were irradiated with 100 keV Kr+ and Xe+ ions at the same fluence of 5x1016 ions/cm2 at room temperature (RT). The samples were analyzed using Rutherford backscattering spectroscopy (RBS) and X-ray diffraction (XRD). The experimental results have shown that the Kr and Xe irradiations at RT leads to the formation of Ni silicides at room temperature (RT). The surface morphology of the irradiated sample …

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