Nanostructures and Properties of Vanadium Oxide Thin Film Prepared by Spray Pyrolysis Method

2017 ◽  
Vol 890 ◽  
pp. 287-290
Author(s):  
Elvan Şenarslan ◽  
Betül Güzeldir ◽  
Mustafa Sağlam
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Precursor Solution ◽  
Oxide Thin Film ◽  
Morphological Properties ◽  
Solution Flow Rate ◽  
Spray Pyrolysis Method ◽  
Solution Flow ◽  
Glass Substrates ◽  
Deposition Parameters

In this research, we reported structural, optical and morphological properties of va nadium oxide thin films directly grown on the glass substrates by fully automated spray pyrolysis equipment. The substrate temperature was set at 450 °C and the nozzle to substrate distance was optimized to be 20 cm. The precursor solution was prepared as 0.05 M by mixing 0.393 gr of vanadium trichloride (VCl3) in 50 mL of deionized water. The deposition parameters were 5 mL in 1 minute solution flow rate, 90° position of spray nozzle towards the substrate. Atmospheric air was used as carrier gas with 2.5 mbar pressure. Nanostructures and optical properties of as-grown films examined using X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-visible spectrophotometer techniques. After thin films annealed at 500 °C, SEM, XRD and absorption measurements were taken again. The obtained results were compared.

EFFECTS OF SPRAY PYROLYSIS DEPOSITION PARAMETERS ON MORPHOLOGICAL, OPTICAL AND STRUCTURAL PROPERTIES OF WO3 NANOSTRUCTURED THIN FILMS

2020 ◽  
Vol 27 (09) ◽  
pp. 1950203
Author(s):  
ALI AKHAVAN MAVARDIANI ◽  
MOHAMMAD BAGHER RAHMANI
Keyword(s):  
Thin Films ◽  
Surface Morphology ◽  
Spray Pyrolysis ◽  
Precursor Solution ◽  
Cost Effective ◽  
Solution Concentration ◽  
Visible Range ◽  
Glass Substrates ◽  
Deposition Parameters ◽  
Vis Spectroscopy

In this experimental research, tungsten trioxide (WO3) thin films were deposited using ammonium tungstate ((NH4)2WO4) by a simple and cost-effective technique of spray pyrolysis on top of glass substrates. The surface morphology, structural and optical properties of prepared samples were studied using field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) pattern analysis and UV–Vis spectroscopy techniques, respectively. Studied deposition parameters were: substrate temperature (300, 350, 400, 450 and 500∘C), concentration of the precursor solution (0.01, 0.02, 0.04, 0.08, 0.1 and 0.2[Formula: see text]M), volume of the precursor solution (50, 100, 150 and 200[Formula: see text]mL) and the effect of pulsed spraying at different concentrations (0.01, 0.1 and 0.2[Formula: see text]M). FESEM images showed that the surface morphology has formed like nested micro-fibrous rings with a uniform distribution all over the surface. The XRD patterns revealed that increasing the solution concentration to 0.2[Formula: see text]M shows some peaks which can be attributed to WO3 with the hexagonal crystal structure. Transmission spectra of the samples indicate that all of the prepared samples are transparent in the visible range, with the calculated direct bandgap ranging from about 2.93[Formula: see text]eV to 3.96[Formula: see text]eV, depending on the deposition conditions.

Effect of Tin Oxide Coatings by Spray Pyrolysis Process on Mechanical Properties of Aluminium, Brass and Mild Steel

2021 ◽  
Vol 13 (2) ◽  
Author(s):  
M. Shunmugasundaram ◽  
A. Praveenkumar ◽  
L. Ponraj Sankar ◽  
S. Sivasankar
Keyword(s):  
Mechanical Properties ◽  
Mild Steel ◽  
Substrate Temperature ◽  
Spray Pyrolysis ◽  
Tin Oxide ◽  
Microstructural Analysis ◽  
Solution Concentration ◽  
Solution Flow Rate ◽  
Spray Pyrolysis Method ◽  
Solution Flow

Mechanical properties of materials are enhanced by different methods to increase the usage of the materials. In this research spray pyrolysis method is employed to increase the mechanical characteristics of three different materials. The tin oxide is chosen as coated material and aluminium, brass, mild steel are selected as substrate materials. The 500nm thin film is developed over the substrate materials by spray pyrolysis. The substrate temperature are chosen as 300? C for aluminium, 400? C for brass and mildsteel. Nozzle to substrate distance is 0.4 m, substrate temperature is 300? C for aluminium and 400? C for solution concentration as 0.2 mole and solution flow rate is 1ml/min are selected for constant deposition parameters. The hardness and tensile strength result clearly shows that strength is increased by adding the coating over the surface. The material is heated above crystallization temperature and SnO2 increases the tensile and hardness strength of the materials. The triangular metrological microscope is used to examine the microstructure of non coated and coated substrate materials. The microstructural analysis is showed that the uncoated surface of the substrate material is full of rough and pores. And displays that the tin oxide coated surface of the substrates after the initial deposition disclosed a surface with a agglomeration of tin oxide in homogeneous and uniform than the uncoated substrates.

Optoelectronic Properties of Fluorine and Cobalt Co-Doped Tin Oxide Thin Films Deposited by Chemical Spray Pyrolysis

2019 ◽  
Vol 60 ◽  
pp. 63-75 ◽  
Author(s):  
Naoual Houaidji ◽  
Mejda Ajili ◽  
Baghdadi Chouial ◽  
Najoua Turki Kamoun ◽  
Kenza Kamli ◽  
...  
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Carrier Concentration ◽  
Tin Oxide ◽  
Hall Mobility ◽  
Spray Pyrolysis Method ◽  
Chemical Spray Pyrolysis ◽  
Glass Substrates ◽  
Chemical Spray ◽  
Co Doped

Transparent conducting Cobalt-fluorine co-doped tin oxide (SnO2: (Co, F)) thin filmswere deposited onto preheated glass substrates using the chemical spray pyrolysis method. The ([Co2+]/[Sn4+]) atomic concentration ratio (y)in the spray solution was varied between 0 and 5 at. %. The structural, electrical, optical and photoluminescence properties of these films were studied. It is found that the thin films are polycrystalline with a tetragonal crystal structure corresponding to SnO2 phase having a preferred orientation along the (200) plane. Transmission and reflection spectra reveal the presence of interference fringes indicating thickness uniformity and surface homogeneity of the deposited thin films. The electrical resistivity (ρ), volume carrier concentration density (Nv), surface carrier concentration density (Ns) and Hall mobility (μ) of the synthesized thin films were determined from the Hall Effect measurements in the Van der Paw-configuration and the following results were obtained: n-type conductivity in all deposited films, a low resistivity of 1.16×10-2 Ω.cm, and a high Hall mobility of 15.13×102 cm2.V-1.s-1with Co concentration equals to 3 at. %. These results show that the electrical properties of these thin films where greatly improved making them suitable as ohmic contact in photovoltaic application devices.

Fe2O3 Thin Films Prepared by Ultrasonic Spray Pyrolysis

2010 ◽  
Vol 644 ◽  
pp. 105-108 ◽  
Author(s):  
M.A. García-Lobato ◽  
A. Hernández-V ◽  
H.M. Hdz-García ◽  
Arturo I. Martinez ◽  
M.I. Pech-Canul
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Ultrasonic Spray Pyrolysis ◽  
Morphological Properties ◽  
Amorphous Thin Films ◽  
Glass Substrates ◽  
Ultrasonic Spray Pyrolysis Technique ◽  
Ultrasonic Spray ◽  
Iron Oxide Films

Fe2O3 thin films were obtained on glass substrates by the ultrasonic spray pyrolysis technique; additionally, a thermodynamic analysis on the Fe2O3 formation from different precursor salts was performed. In this work, the influence of the deposition temperature is related with the structural, optical, and morphological properties of the iron oxide films. The present results reveal that amorphous thin films are obtained at temperatures lower than 350° C, while polycrystalline films with the maghemite structure are formed at higher temperatures.

Study of Transmittance of CdS Thin Films Prepared by Spray Pyrolysis

2011 ◽  
Vol 130-134 ◽  
pp. 1011-1015
Author(s):  
Guang Ming Wu ◽  
Zhi Qian Zhang ◽  
Yan Ying Zhu ◽  
Yang Cao ◽  
Yang Zhou ◽  
...  
Keyword(s):  
Thin Films ◽  
Substrate Temperature ◽  
Spray Pyrolysis ◽  
Gas Flow ◽  
Raw Materials ◽  
Precursor Solution ◽  
Optimum Conditions ◽  
Glass Substrates ◽  
Thin Film Preparation ◽  
Cds Thin Films

Cadmium chloride and thiourea were used as raw materials to synthesize precursor solution, and CdS thin films were prepared on glass substrates by the home-made spray pyrolysis thin-film preparation device.Affects of preparation parameters, for example, the substrate temperature and fog particle velocity on the structure of CdS thin films were emphatically studied in the paper. The results showed that the optimum conditions for preparation of CdS thin films are as follows: the substrate temperature 350 °C, the gas flow rate 4L/min, and the annealing temperature 400 °C. Under the optimum conditions and argon as the carrier gas, with a spray time of 32s, a 1.9μm thickness CdS film which had a (002) plane grain size of 32.3nm was obtained. And the transmittance of the film was above 70% at the wavelength range of from 500nm to 850nm.

scholarly journals Study of some structural , optical , Electrical Properties of CdS thin films deposited by chemical Spray Pyrolysis Method

2009 ◽  
Vol 6 (3) ◽  
pp. 519-225
Author(s):  
Baghdad Science Journal
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Spray Pyrolysis ◽  
Energy Gap ◽  
Hall Effect Measurement ◽  
Spray Pyrolysis Method ◽  
Chemical Spray Pyrolysis ◽  
Glass Substrates ◽  
Pyrolysis Method ◽  
Cds Thin Films

In this research we prepared CdS thin films by Spray pyrolysis method on a glass substrates and we study its structural , optical , electrical properties .The result of (X-Ray ) diffraction showed that all thin films have a polycrystalline structure , The relation of the transmission as a function of wavelength for the CdS films had been studied , The investigated of direct energy gap of the CdS its value is (2.83 eV). In Hall effect measurement of the CdS we find the charge carriers is p – type and Hall coefficient 1157.33(cm3/c) ,Hall mobility 6.77(cm2/v.s)

Optical Properties of Zinc Oxide (ZnO) Thin Films Prepared by Spray Pyrolysis Method

2014 ◽  
Vol 895 ◽  
pp. 226-230 ◽  
Author(s):  
B.V. Rajendra ◽  
Vinayak Bhat ◽  
Dhananjaya Kekuda
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Optical Properties ◽  
Spray Pyrolysis ◽  
Band Gap Energy ◽  
Zno Thin Films ◽  
Spray Pyrolysis Method ◽  
Glass Substrates ◽  
Pyrolysis Method ◽  
Substrate Temperatures

Zinc oxide (ZnO) thin films were deposited on the glass substrates using Zinc acetate dehydrate solution through spray pyrolysis method. The films were obtained by spraying 0.05M concentrated solution at a rate of 0.5ml for 10 min and were deposited at different substrate temperatures ranging from 473K to 673K. A comprehensive study was carried out to realize the effect of substrate temperatures and subsequent annealing on optical properties of the ZnO thin films. It was observed that the band gap energy decreases with increases the substrate temperature and annealing. Optical constants such as the refractive indexnand extinction coefficientkwere determined from transmittance spectrum in the ultravioletvisible (UVVIS) regions by Swanepoel envelope method and crystallinity was confirmed by Urbach tail and atomic force microscope images.

CHARACTERIZATION OF NICKEL OXIDE THIN FILM — DC REACTIVE MAGNETRON SPUTTERING

2011 ◽  
Vol 18 (01n02) ◽  
pp. 11-15 ◽  
Author(s):  
K. ASHOK
Keyword(s):  
Thin Films ◽  
Magnetron Sputtering ◽  
Nickel Oxide ◽  
Deposition Time ◽  
Preferred Orientation ◽  
Oxide Thin Film ◽  
Morphological Properties ◽  
Force Microscopy ◽  
Glass Substrates ◽  
Atomic Force

Nickel oxide ( NiO ) thin films were deposited on glass substrates by reactive direct current (DC) magnetron sputtering of a Ni target in an Ar / O 2 mixture. The effect of thickness (0.2 μm, 0.4 μm and 1 μm) on the structural and surface morphological properties of NiO thin films was investigated. These films were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and atomic force microscopy (AFM). The films were cubic NiO , with preferred orientation in the (111) direction at lower deposition time (10 mins). At higher deposition time (60 mins) the preferred orientation shifted to (200) plane. Electrochemical behavior of NiO thin films for different thickness samples were analyzed between the electrode potential ‑0.2 and 0.8 V vs scanning calomel electrode (SCE) in both anodic and cathodic directions and the current responses were measured.

scholarly journals A Copper Oxide (CuO) Thin Films Deposited by Spray Pyrolysis Method

2019 ◽  
Vol 253 ◽  
pp. 03002 ◽  
Author(s):  
Youcef Bellal ◽  
Antar Bouhank ◽  
Hacene Serrar ◽  
Tunç Tüken ◽  
Gökmen Sığırcık
Keyword(s):  
Thin Films ◽  
Copper Oxide ◽  
Spray Pyrolysis ◽  
Visible Region ◽  
Spray Pyrolysis Method ◽  
X Ray Diffraction ◽  
Monoclinic Crystal ◽  
Equal Concentration ◽  
X Ray ◽  
Glass Substrates

A simple and low-cost procedure (spray pyrolysis) was used to elaborate a copper oxide thin films on ordinary glass substrates. A copper nitrate was used and dissolved in two different solutions (Water, Methanol) S1 and S2 respectively in order to obtain an equal concentration; CS1,S2=0.5M. The spray pyrolysis deposition made at fixed temperature T=500°C and different volumes of S1 or S2 on the glass substrates. The X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-vis spectrophotometry were used to determinate the structural, morphological and optical properties of CuO thin films. The X-ray diffraction patterns confirm the presence of the polycrystalline phase of CuO as monoclinic crystal structure with preferential orientation along (110), (002), (111), (200) and (020). Their optical band gaps ranged from 3.95 to 4.02eV for thin films made with S1, and from 1.6 to 1.95eV for thin films made with S2 with a high absorbency in the visible region, which is in agreement with the values of the literature.

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