scholarly journals Synthesis of ZnO thin film by chemical spray pyrolysis using its nano powder

2021 ◽  
Vol 49 (1) ◽  
Author(s):  
Reem S. Khaleel ◽  
◽  
Mustafa Sh. Hashim ◽  
Samer Gh. Majeed ◽  
◽  
...  
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Chemical Spray Pyrolysis ◽  
Sem Images ◽  
X Ray ◽  
Spray Process ◽  
Glass Substrates ◽  
Chemical Spray ◽  
Zno Powders ◽  
Deposited Films

The deposition of metal oxides powder faces several problems, including poor adhesion to the bases deposited on them, the presence of many cracks, poor thickness control, and other disadvantages. The current study gives a new and simple idea to deposit thin films using two ZnO powders with nano and microparticle sizes on glass substrates. This was done by transforming the powders to Zinc acetate and then using chemical spray pyrolysis to deposit ZnO thin films. Scanning electron microscope (SEM) images showed that the prepared film from the nanopowder (ZnONano) lost the independence of powder’s nanoparticles and became a homogeneous film with nano projections. But the deposited one from the micro powder (ZnOMicro) had both nanorods and nanoplates. The different shapes and sizes of ZnO particles in ZnOMicro powder were disappeared after the Spray process. The two deposited films were homogeneous, crack-free and there were controllable thicknesses during the deposition. X-ray spectroscopy (EDS) was used to measure weights and atomic percentages of elements for the deposited films. The structures of the deposited films were approximately identical as the X-ray diffraction (XRD) technique showed. The optical properties of these two films were studied and their parameters were measured and calculated.

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.

Characterization of Transparent Conducting Al:ZnO Thin Films Deposited by Chemical Spray Pyrolysis

2009 ◽  
Vol 67 ◽  
pp. 103-108 ◽  
Author(s):  
C.M. Mahajan ◽  
A.G. Godbole ◽  
S.P. Gumfekar ◽  
S.H. Sonawane ◽  
M.G. Takwale
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Resistivity Measurement ◽  
Aluminium Chloride ◽  
Al2o3 Content ◽  
Chemical Spray Pyrolysis ◽  
Al Doping ◽  
X Ray ◽  
Transparent Conducting ◽  
Chemical Spray

Nanocrystalline undoped and Al doped ZnO thin films were synthesized by the chemical spray pyrolysis of Zinc acetate and Aluminium chloride solution. The optoelectronic properties of undoped and Al:ZnO films were investigated. The XRD patterns of films were preferably oriented along c-axis [0 0 2] plane with the hexagonal wurtzite structure. The Al-doping caused no additional X-ray diffraction peaks when compared with XRD of undoped film, indicating Al2O3 content was below the detection limit. The crystallite size of undoped and Al doped film was 48 nm and 51nm respectively, as measured from X-ray diffractogram. The films are of high optical transmittance (≥ 90%). The resistivity of the film was found to decrease because of Al doping. The dark resistivity measurement for Al:ZnO film was of the order of 10-3 Ω-1cm-1. The band gap energy of the film was found to vary from 3.25 to 3.32eV indicating the Moss Burstein shift. Al:ZnO films can be used as transparent conducting oxide layers for photovoltaic applications.

Morphological and Structural Study of Nanostructured Tin Dioxide (SnO2) Thin Films by Spray Pyrolysis

2012 ◽  
Vol 626 ◽  
pp. 672-676
Author(s):  
Boon Hoong Ong ◽  
Heng Choy Lee ◽  
Sharifah Bee Abdul Hamid
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Substrate Temperature ◽  
Spray Pyrolysis ◽  
Tin Dioxide ◽  
Spray Pyrolysis Technique ◽  
Chemical Spray Pyrolysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Chemical Spray

Nanostructured SnO2 thin films were deposited on glass substrate using chemical spray pyrolysis technique. Three influent synthesis parameters, namely (i) the precursor concentration (0.2M and 0.5M), (ii) the substrate temperature (250°C and 350°C) and (iii) doping with zinc (Zn) were investigated in term of their effects on the morphology and structure of SnO2 thin films. These films were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and energy dispersive X-ray spectrometry (EDX) techniques. The grain size of the films was observed to increase as the concentration of the precursors is increased. Substrate temperature is proved to be crucial in determining the crystallinity of the films as the films are reported to grow at temperature above 270°C. Besides, the addition of dopant was found to reduce the grain size of the film.

SYNTHESIS AND CHARACTERIZATION OF NANOCRYSTALLINE Co-DOPED ZnO THIN FILMS PREPARED BY CHEMICAL SPRAY PYROLYSIS FOR OPTOELECTRONIC APPLICATIONS

2021 ◽  
Author(s):  
FAEZ M. HASSAN ◽  
AUS A. NAJIM
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Doping Concentration ◽  
Chemical Spray Pyrolysis ◽  
Co Doping ◽  
Glass Substrates ◽  
Chemical Spray ◽  
Good Transparency ◽  
The Impact ◽  
Co Doped

ZnO:Co thin films were synthesized by the chemical spray pyrolysis (CSP) on glass substrates. Then, investigated the impact of Co doping concentration on its physical properties. XRD analyses show that all films have a polycrystalline structure of hexagonal ZnO. The crystallite size increased from 18[Formula: see text]nm to 25[Formula: see text]nm with Co doping concentrations. Furthermore, the unit cell volume increased from 47.485[Formula: see text]Å to 47.831[Formula: see text]Å, and the Zn–O bond length expanded from 1.97588[Formula: see text]Å to 1.98071[Formula: see text]Å. SEM observations reveal the formation of fiber-like nanostructures in the Co-doped thin films. The diameter of nanofibers increased with Co doping concentration from 260[Formula: see text]nm to 700[Formula: see text]nm. The optical characteristics were studied by the UV-Visible spectrophotometer and manifest the optical transparency vary with Co doping. In addition, the band gap decreases from 3.27[Formula: see text]eV to 2.73[Formula: see text]eV with increasing Co doping concentrations. The conductivity varied from 3.35[Formula: see text]S[Formula: see text][Formula: see text][Formula: see text]m[Formula: see text] to 19.88[Formula: see text]S[Formula: see text][Formula: see text][Formula: see text]m[Formula: see text] with Co doping concentrations. Empirical models were proposed to evaluate the correlated variables with excellent accuracy with the experimental data. The best result was accomplished in ZnO:Co1% films, where good transparency and high conductivity were achieved.

scholarly journals Fe2O3 Thin Films Prepared by Spray Pyrolysis Technique and Study the Annealing on its Optical Properties

2015 ◽  
Vol 45 ◽  
pp. 24-31 ◽  
Author(s):  
Khalid Haneen Abass
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Spray Pyrolysis ◽  
Annealing Temperature ◽  
Spray Pyrolysis Technique ◽  
Chemical Spray Pyrolysis ◽  
Glass Substrates ◽  
Chemical Spray ◽  
Coefficient Increase ◽  
Uv Visible

Fe2O3 thin films that doped by NiO were obtained on glass substrates by the chemical spray pyrolysis technique, and annealed at 450 °C and 500 °C. The effect of annealing on optical properties was studied by recording the absorbance spectra using UV-Visible spectrophotometer. The refractive index decreases with increasing annealing temperature, such as an optical band gap that decreases from 2.68 eV before annealing to 2.58 eV after annealing of 500 °C. Absorption coefficient and extinction coefficient increase with increasing annealing temperature.

scholarly journals Rutherford Backscattering Spectrometry Analysis and Structural Properties of ZnxPb1-xS Thin Films Deposited by Chemical Spray Pyrolysis

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Abiodun E. Adeoye ◽  
Emmanuel Ajenifuja ◽  
Bidini A. Taleatu ◽  
A. Y. Fasasi
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Rutherford Backscattering Spectrometry ◽  
Rutherford Backscattering ◽  
Soda Lime Glass ◽  
Chemical Spray Pyrolysis ◽  
Lead Sulphide ◽  
X Ray ◽  
Spectrometry Analysis ◽  
Chemical Spray

Zinc lead sulphide ternary thin films were prepared by chemical spray pyrolysis on soda lime glass substrates using zinc acetate, lead acetate, and thiourea sources precursor. The films were characterized using Rutherford backscattering (RBS) spectrometry, energy dispersive X-ray (EDX) spectroscopy, scanning electron microscopy (SEM), and X-ray diffractometry (XRD). RBS studies revealed variation in thickness and stoichiometry of the films with respect to compositional substitution between Zn and Pb, thereby giving effective composition ZnxPb1-xS, where x=0, 0.035, 0.069, 0.109, 0.176, and 0.217. Film thickness obtained by length conversion ranged from 81.02 nm to 90.03 nm. Microstructural analyses also indicated that the growth and particle distribution of the films were uniform across substrate’s surface. Diffraction studies showed that the films possess FCC crystalline structure. Crystallite size reduced from 14.28 to 9.8 nm with increase in Zn2+ in the ZnxPb1-xS samples.

Chemical Spray Pyrolysis Path to Synthesis of ZnO Microsausages from Aggregation of Elongated Double Tipped Nanoparticles

2012 ◽  
Vol 706-709 ◽  
pp. 2577-2582 ◽  
Author(s):  
Cosmas Muiva ◽  
Stephen T. Sathiaraj ◽  
Kelebogile Maabong
Keyword(s):  
Electron Microscope ◽  
Spray Pyrolysis ◽  
Chemical Spray Pyrolysis ◽  
X Ray Diffraction ◽  
Absorption Mechanism ◽  
X Ray ◽  
Glass Substrates ◽  
Chemical Spray ◽  
Regular Patterns ◽  
Scanning Electron

The versatile chemical spray pyrolysis was used to prepare elongated double tipped ZnO nanoparticles and microsausages on glass substrates. X-ray diffraction studies revealed several crystallographic plane orientations with the most predominant along the (002) direction. Scanning electron microscope (SEM) observations indicated double tipped nanoparticles with an aspect ratio of 4.5-8.6 which coalesced in regular patterns to form microsized sausages of width ranging up to 1.2 µm. The absorption mechanism was through direct transitions with an absorption edge corresponding to a band gap of 3.18 eV.

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