Effect of Different Precursors Solution of NiO on the Properties of ZnO/NiO Nanocomposites Thin Films Grown by Spray Pyrolysis

2021 ◽  
Vol 69 ◽  
pp. 23-31
Author(s):  
Antar Bouhank ◽  
Youcef Bellal
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Nickel Sulfate ◽  
Nickel Chloride ◽  
Morphological Characterization ◽  
Spray Pyrolysis Method ◽  
Force Microscopy ◽  
Atomic Force ◽  
Size Of Particles ◽  
Different Grain Size

In this paper, the influence of the precursors of nickel oxide (NiO) on the properties of ZnO/NiO nanocomposites thin films, grown by spray pyrolysis method, has been investigated. The nickel sulfate, nickel chloride and nickel nitrate have been used as precursors of NiO, each precursor has been mixed with Zinc oxide (ZnO)’ precursor to elaborate ZnO/NiO nanocomposites thin films with the method mentioned above. The aim of this paper is to confirm the similitude of precursors in the nanocomposites. For this reason, and to reveal this goal, some techniques were used as the structural analysis by X-ray diffraction (XRD) which a high intensity has been detected corresponds to the ZnO / NiO films with nickel chloride precursor, UV-Visible characterization depicts the presence of a maximum adsorption band appears in the ultraviolet range, the morphological characterization with Atomic Force Microscopy (AFM) reveals the roughness and the different grain size of particles, the big one of the latter agree, also, with to nickel chloride precursor used. The values of optical band gaps Eg are globally equal with high value noticeable agree with films that prepared with nickel chloride and zinc chloride precursors. The results obtained confirm the aim and a good agreement with the latter were found.

Laser-assisted spray pyrolysis process for the growth of TiO2 and Fe2O3 nanoparticle coatings

2007 ◽  
Vol 22 (3) ◽  
pp. 649-654 ◽  
Author(s):  
Sarath Witanachchi ◽  
Gayan Dedigamuwa ◽  
Pritish Mukherjee
Keyword(s):  
Spray Pyrolysis ◽  
Laser Heating ◽  
Spray Pyrolysis Method ◽  
Average Particle ◽  
Force Microscopy ◽  
Organometallic Precursor ◽  
Atomic Force ◽  
Fe2o3 Nanoparticle ◽  
Nanoparticle Coatings ◽  
Spray Pyrolysis Process

We present a laser-assisted spray pyrolysis method to fabricate nanoparticle coatings of metal oxides. In this process, 1.5-μm size droplets of a titanium- or iron-containing organometallic precursor were injected into a vacuum chamber with SF6 carrier gas. The strong absorption of a 3W CO2 laser beam focused onto the injector tip in the presence of SF6 increased the temperature of the gas and the droplets to about 300 °C. Films deposited on heated substrates with and without the CO2 laser heating were studied by atomic force microscopy. The laser heating of the droplets caused the solvent to evaporate before depositing on the substrate, leading to grain sizes that are about a factor of 3 smaller than those deposited without laser heating. By controlling the concentration of the precursor in the solvent, the average particle sizes have been tuned from 80 to 50 nm.

scholarly journals Synthesis, characterization, and optical properties of copper oxide thin films obtained by spray pyrolysis deposition

2019 ◽  
Vol 11 (22) ◽  
pp. 64-71
Author(s):  
Rawaa A. Faris
Keyword(s):  
Thin Films ◽  
Copper Oxide ◽  
Spray Pyrolysis ◽  
Average Particle Size ◽  
Average Particle ◽  
Oxide Thin Films ◽  
Force Microscopy ◽  
Atomic Force ◽  
Spray Pyrolysis Deposition ◽  
Xrd Patterns

     Copper oxide thin films were synthesized by using spray pyrolysis deposition technique, in the temperature around 400°C in atmosphere from alcoholic solutions. Copper (II) chloride as precursor and glass as a substrate. The textural and structural properties of the films were characterized by atomic force microscopy (AFM), X-ray diffraction (XRD). The average particle size determined from the AFM images ranged from 30 to 90 nm and the roughness average was equal to 9.3 nm. The XRD patterns revealed the formation of a polycrystalline hexagonal CuO. The absorption and transmission spectrum, band gap, film thickness was investigated. The films were tested as an optical limiter. The experiments were performed using Q-switched Nd:YAG laser at 532nm and 1064 nm at different intensities. Copper oxide thin films appear to be attractive candidates for optical limiting application and sensor application.

FABRICATION AND OPTICAL AND MORPHOLOGICAL CHARACTERIZATION OF n+-ZnO/i-ZnO AND n+-ZnO/ZnSe BILAYERS USED AS OPTICAL WINDOWS IN SOLAR CELLS

2002 ◽  
Vol 09 (05n06) ◽  
pp. 1617-1621
Author(s):  
C. CALDERÓN ◽  
H. INFANTE ◽  
G. GORDILLO
Keyword(s):  
Thin Films ◽  
Atomic Force Microscopy ◽  
Solar Cells ◽  
Morphological Characterization ◽  
Morphological Properties ◽  
Spectral Transmittance ◽  
Optical Window ◽  
Force Microscopy ◽  
Atomic Force

This work presents results concerning the development of n +- ZnO/i-ZnO and n +- ZnO/ZnSe bilayer structures with adequate properties to be used as optical windows in solar cells based on CuInSe 2 thin films. The optical and morphological properties of each of the layers constituting the bilayer structures were studied through spectral transmittance and atomic force microscopy (AFM) measurements. The studies revealed that windows of this type allow a significant increase of the spectral range of absorbed radiation by the solar cell in comparison with those using ZnO/CdS as optical window.

Structural and Morphological Differences of Thin Films Obtained by Plasma Polymerization of Pyrrole (Ppy) and Thiophene (Pth)

2002 ◽  
Vol 725 ◽  
Author(s):  
Salvador Borrós ◽  
M.Paz Diago ◽  
Joan Esteve ◽  
Núria Agulló
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Photoelectron Spectroscopy ◽  
Plasma Polymerization ◽  
Morphological Characterization ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Morphological Differences

AbstractIn this work, thin films (thickness ∼ 0.5 μm) were obtained by plasma polymerization of pyrrole (Ppy) and thiophene (Pth) at 25-30 W and 0.1-0.2 mbar of pressure. Further doping with iodine was carried out to some of the Ppy and Pth films (Ppy/I2, Pth/I2) in order to enhance their electrical conductivity properties.Structural and morphological characterization of both Ppy and Pth as well as of Ppy/I2 and Pth/I2 was performed using Infrared Spectroscopy (IR), X-ray Photoelectron Spectroscopy (XPS) and Atomic Force Microscopy (AFM).In the light of the information given by IR, XPS and AFM techniques, exhaustive and accurate description of both undoped and I2/doped Ppy and Pth films obtained by Plasma Polymerization is attained.

Preparation and Gas Sensing Properties of 2,9,16,23-Tetra-Tert-Butyl-29H, 31H- Copper (II) Phthalocyanine LB Thin Films

2012 ◽  
Vol 622-623 ◽  
pp. 679-684
Author(s):  
Si Yu Wang ◽  
Jian Hua Xu ◽  
Wen Yao Yang ◽  
Yan Chen ◽  
Ya Jie Yang
Keyword(s):  
Thin Films ◽  
Gas Sensing ◽  
Morphological Characterization ◽  
Brewster Angle Microscopy ◽  
Lb Films ◽  
Force Microscopy ◽  
Tert Butyl ◽  
Atomic Force ◽  
Pressure Area ◽  
Optical Gas Sensor

A phthalocyanine derivative: 2,9,16,23-tetra-tert-butyl-29H,31H-copper(II) phthalocyanine (CuttbPc) was used as an optical gas sensor based on Langmuir-Blodgett (LB) films. Surface pressure-area per molecule (π–A) isotherms and Brewster Angle Microscopy (BAM) will show the process of the monolayer formation at the air-water interface. The responses of the thin films to various volatile organic compounds (VOCs) were recorded by UV-Vis absorption spectra and the morphological characterization was performed by Atomic Force Microscopy (AFM). The experimental results indicate that highly-ordered and uniform films can be prepared at about 33mN/m with the transfer ratio of 0.7. The results also demonstrated that CuttbPc LB films are promising to be applied into optical gas sensors for VOCs detection and recognition.

Optical and Morphological Characterization of PTCDI-C13

2008 ◽  
Vol 1091 ◽  
Author(s):  
Marco Stella ◽  
Fernando Villar ◽  
Fredy Enrique Rojas ◽  
Mónica Della Pirriera ◽  
Cristobal Voz ◽  
...  
Keyword(s):  
Thin Films ◽  
Substrate Temperature ◽  
High Vacuum ◽  
Organic Thin Films ◽  
Morphological Characterization ◽  
Force Microscopy ◽  
Vacuum Chambers ◽  
Photothermal Deflection Spectroscopy ◽  
Atomic Force ◽  
Deposition Parameters

AbstractThe organic photovoltaic technology has developed much in the last few years thanks to the optimization of the solar cell geometry and, specially, to the research for new performing materials. Nevertheless, much work has still to be done in order to better know the real mechanisms regulating the function of such novel class of semiconductors. The study of thin-film micro-structure, and the influence of the deposition parameters on it, is an important issue in order to obtain best optical and electrical properties. Thermal evaporation in high-vacuum chambers is the more suitable deposition technique to obtain organic thin-films with well organize molecular structure. Deposition parameters such as the substrate temperature and deposition rate may have some important effect on the molecules ordering. In this paper the effects of substrate temperature on structural and optical properties have been studied for N,N′-ditridecyl perylene diimide (PTCDI-C13) thin-films. Four samples have been deposited at 30, 60, 90 and 120°C substrate temperature and their absorption has been investigated by photothermal deflection spectroscopy (PDS) and transmittance spectroscopy. Moreover, simulations of the transmittance spectra have been calculated in order to obtain the optical constants n and k. Finally atomic force microscopy (AFM) has been employed to analyze the superficial morphology of the thin-films.

Electron and Atomic Force Microscopy of Cadium Sulfide Thin Films Deposited by Spray Pyrolysis

2004 ◽  
Vol 10 (S02) ◽  
pp. 644-645
Author(s):  
Dwight Acosta ◽  
Carlos Magaña ◽  
Arturo Martinez
Keyword(s):  
Thin Films ◽  
Atomic Force Microscopy ◽  
Spray Pyrolysis ◽  
Force Microscopy ◽  
Atomic Force

Extended abstract of a paper presented at Microscopy and Microanalysis 2004 in Savannah, Georgia, USA, August 1–5, 2004.

scholarly journals ZnO thin films by spray pyrolysis and its doping with Sb

Quimica Hoy ◽  
2012 ◽  
Vol 2 (4) ◽  
pp. 4
Author(s):  
Jesus A. Sandoval ◽  
Ana M. Arato ◽  
E. Perez Tijerina ◽  
A. G. Castillo ◽  
T. K. Das Roy ◽  
...  
Keyword(s):  
Thin Films ◽  
Band Gap ◽  
Spray Pyrolysis ◽  
Visible Region ◽  
Band Gap Energy ◽  
Morphological Characterization ◽  
Zno Thin Films ◽  
Force Microscopy ◽  
Glass Substrates ◽  
Sb Doping

Highly transparent ZnO thin films were prepared using spray pyrolysis of a solution containing Zn(OAc)2 and SbC13 on glass substrates kept at 400ºC. Further, these films were doped with Sb by in situ process by dissolving SbCl3 in the spray solution. Crystallographic structural analysis was done using X-ray diffractometer and elemental analysis was done using Auger electron spectrometer. Morphological characterization was done by atomic force microscopy. The UV-Vis transmittance measurements indicated that the films were 90% transparent in the visible region. The value of band gap energy calculated from UV-Vis characterization showed that undoped and Sb doped films have slightly different band-gap energies. The electrical resistivity measurements showed a substantial change in the resistance of the ZnO thin films due to Sb doping.

scholarly journals Structural and optical properties of tungsten doped TiO2 thin films fabricated by spray pyrolysis technique

2020 ◽  
Vol 2 (1) ◽  
pp. 1-8
Author(s):  
Tamilnayagam V ◽  
Keerthika Kumarasamy ◽  
Tamiloli Devendhiran ◽  
Mohanraj K ◽  
Ilavarasan L
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Energy Gap ◽  
Spray Pyrolysis Technique ◽  
Amorphous Structure ◽  
Tio2 Thin Films ◽  
Optical Energy Gap ◽  
Force Microscopy ◽  
Atomic Force ◽  
Double Beam

The pure and tungsten doped titanium oxide WxTi1-xO2 (x=0, 0.1) thin films have been successfully deposited on the glass substrate at 400 °C using spray pyrolysis technique. The structural properties of the prepared films were characterized by X-Ray Diffraction (XRD). From the XRD spectrum, the sample shows the amorphous structure. Their surface morphology was probed using Scanning Electron Microscopy (SEM) and the mechanical properties, topography and surface roughness of the grown films was investigated by Atomic Force Microscopy (AFM). The functional group and optical characteristic of prepared films were analyzed by Fourier Transform Infra-Red (FT-IR) spectroscopy and UV-Vis-double beam spectrometer.  The optical energy gap was determined by transmittance measurement.

Electron and Atomic Force Microscopy of Electrochromic WO3 and Molybdenum Doped WO3 Thin Films Deposited by Pulsed Spray Pyrolysis

2010 ◽  
Vol 644 ◽  
pp. 129-133
Author(s):  
Dwight R. Acosta ◽  
Jesús M. Ortega ◽  
Carlos R. Magaña
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Atomic Force Microscopy ◽  
Spray Pyrolysis ◽  
Electrochromic Properties ◽  
Force Microscopy ◽  
Starting Solution ◽  
Atomic Force ◽  
Fto Glass ◽  
Molybdenum Concentration

WO3/FTO/Glass and WO3:Mo/FTO/Glass thin films were deposited using the pulsed spray pyrolysis technique. The Molybdenum doped thin films were deposited using 2,4,6,8 and 10 % at . concentration in the starting solution. The influence of molybdenum concentration on the structural, electrical, optical and electrochromic properties of WO3:Mo thin films have been systematically studied using Scanning Electron Microscopy (SEM), Selected Area Diffraction Patterns (SAED) in Conventional Transmission Electron Microscopy (CTEM), High Resolution Electron Microscopy (HREM) and Atomic Force Microscopy (AFM). The electrochemical behavior of our materials was studied using cyclic voltammetry both to induce electrochromic behavior and to characterize the electric charge injection and extraction processes. It was found that samples with 2% at. of molybdenum concentration in the starting solution, show the best electrochromic behavior with the highest efficiency and durability. The influence of structural details in our films and their evolution with the molybdenum incorporation, for a fixed substrate temperature on the electrochromic properties of our WO3:Mo thin films has been followed wherever possible.

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