Synthesis and Structural Characterization of Hg(Re)-Pb-Ca-Ba-Cu-O Superconducting Thin Films Grown by Spray Pyrolysis

2010 ◽  
Vol 75 ◽  
pp. 197-201
Author(s):  
Concepción Mejía-García ◽  
José Luis López-López ◽  
Elvia Díaz-Valdés ◽  
Claudia Verónica Vázquez-Vera
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Crystalline Phase ◽  
Deposition Temperature ◽  
Phase Distribution ◽  
Rietveld Method ◽  
Spray Pyrolysis Technique ◽  
Subsequent Treatment ◽  
Fractional Factorial ◽  
Phase Identification

We present a statistical study of the crystalline phase distribution in Pb-Ca-Ba-Cu-O precursor films grown by spray pyrolysis technique, with thickness and composition suitable to incorporate Hg by the sealed quartz tube technique in a subsequent treatment. A series of 9 precursor thin films were deposited on MgO substrates. Interdependence among deposition temperature, solution concentration, annealing temperature and annealed time and the effect in the relative percentage of each precursor phases was studied, applying a fractional factorial design 3IV-II. Chemical composition was obtained from atomic absorption measurements. Crystalline phase identification was performed by X-ray diffraction technique (XRD) and the quantification of each one was carried out by Rietveld method. The BaPbO3, Ba4Pb3O10 ternary phases were obtained at 810°C, and the BaCuO2 phase was got between 835°C and 860°C. Deposition temperature and molarity of the solution have clear influence on the thickness of the film. The effect of deposition temperature on the film composition was observed. Introduction

scholarly journals The physical and optical properties of AZO thin films on teflon substrate at low deposition temperature by spray pyrolysis

2020 ◽  
Vol 18 (3) ◽  
pp. 1222
Author(s):  
Sofea Nabila Hazmin ◽  
F. S. S. Zahid ◽  
N. S. M. Sauki ◽  
M. H. Mamat ◽  
M. N. Amalina
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Spray Pyrolysis ◽  
Deposition Temperature ◽  
Spray Pyrolysis Technique ◽  
Optical Measurements ◽  
Physical Analysis ◽  
X Ray Diffraction ◽  
Visible Reflectance ◽  
Low Deposition Temperature

<span>This paper presents the physical and optical properties of AZO thin films on Teflon substrate at low deposition temperature by spray pyrolysis. In this study, the effect of different process parameters such as spray time and substrate to nozzle distance on the physical and optical characteristic of aluminium doped zinc oxide (AZO) deposited on Teflon substrates was investigated. The AZO thin films were successfully deposited onto Teflon substrate by spray pyrolysis technique at low deposition temperature. The physical analysis by X-ray diffraction (XRD) shows that the deposited Teflon substrate films have a preferred orientation along the direction (100) and (101). Optical measurements were conducted using Jasco/V-670 Ex Uv-Vis-NIR Spectrophotometer model to confirms that in visible ray it is possible to get good reflectance of AZO films with a reflection of 80%. The values of band gaps Eg were calculated from the spectra of UV-Visible reflectance that were vary between 3.06 and 3.14 eV. </span>

scholarly journals Growth and Characterization of Cu2MnSnS4 Thin Films Synthesized by Spray Pyrolysis under Air Atmosphere

Coatings ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 963
Author(s):  
Sarra Dridi ◽  
Eric Aubry ◽  
Nabila Bitri ◽  
Fatma Chaabouni ◽  
Pascal Briois
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Substrate Temperature ◽  
Spray Pyrolysis ◽  
Deposition Temperature ◽  
Spray Pyrolysis Technique ◽  
Ambient Air ◽  
Ambient Atmosphere ◽  
Optical And Electrical Properties ◽  
Carrier Gas

The direct synthesis of chalcopyrite Cu2MnSnS4 (CMTS) thin films by a spray pyrolysis technique on glass substrates under oxidative conditions (ambient atmosphere and using compressed air as a carrier gas instead of nitrogen) was studied. The effect of the deposition temperature on the structural, chemical composition, and optical and electrical properties of thin films has been assessed. X-ray diffraction study reveals that the tetragonal stannite structure crystallizes with a [112] preferential orientation from 280 up to 360 °C, with its crystallinity correlated with the substrate temperature. However, in addition to its crystallization, traces of secondary phases are observed: a mixture of SnO and CuO at 360 °C prevails on the formation of CuS at 320 °C. Above 360 °C, the oxidant conditions combined with the loss in sulfur lead to the crystallization of only the tenorite CuO. The crystallization of sulfides by spray pyrolysis under air is possible only at relatively low deposition temperature for which the oxidation rate is inefficient compared to the sulfidation rate. Further optical studies of stannite films indicate a high absorption coefficient toward the visible range (>104 cm−1) and an optical band gap of about 1.64–1.85 eV, also depending on the substrate temperature. The CMTS thin films deposited below 360 °C exhibit a moderate electrical resistivity of about Ω·cm at room temperature. The properties of the stannite films synthesized using a spray pyrolysis technique in ambient air are comparable to those of films obtained by spray pyrolysis with nitrogen carrier gas despite the presence of oxides traces, an increase in the deposition temperature improving the microstructure, and its related optical and electrical properties.

scholarly journals Effect of Deposition Temperature on Surface Morphology and Electrical Properties of Fluorine Doped Tin Oxide (FTO) Thin Film by Spray Pyrolysis Technique

2015 ◽  
Vol 773-774 ◽  
pp. 652-656
Author(s):  
Noor Sakinah Khalid ◽  
Soo Ren How ◽  
Jais Lias ◽  
Mohd Khairul Ahmad
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electrical Properties ◽  
Spray Pyrolysis ◽  
Tin Oxide ◽  
Deposition Temperature ◽  
Spray Pyrolysis Technique ◽  
Distilled Water ◽  
Spray Pyrolysis Deposition ◽  
Surface Morphologies

Fluorine doped tin oxide (FTO) thin films were prepared at different deposition temperatures using the spray pyrolysis deposition (SPD) technique. The deposition temperature were ranging from 250°C °C to 450°C and the precursor used was 0.5M of SnCl4.5H2O and 1.527M of NH4F completely dissolved in distilled water. It was observed that the conductivity of the FTO thin film increased with increasing of deposition temperature. At 450°C, it was shown the conductivity became smaller. Surface morphologies of FTO thin films at different deposition temperature had shown that the growth of crystallite particles and its distributions were totally affected by the deposition temperature. The transmittance of FTO thin films was over 80% within the wavelength from 300 nm - 800 nm. Thus, the best deposition temperature to be used is around 350°C to 400°C for depositing the FTO film.

scholarly journals Strong texture tuning along different crystalline directions in glass-supported CeO2 thin films by ultrasonic spray pyrolysis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Inti Zumeta-Dubé ◽  
José Manuel García Rangel ◽  
Jorge Roque ◽  
Issis Claudette Romero-Ibarra ◽  
Mario Fidel García Sánchez
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Morphological Characteristics ◽  
Ultrasonic Spray Pyrolysis ◽  
Cost Effective ◽  
Growth Direction ◽  
Large Area ◽  
Smart Windows ◽  
Ultrasonic Spray

AbstractThe strong facet-dependent performance of glass-supported CeO2 thin films in different applications (catalysis, smart windows, etc.) has been the target of diverse fundamental and technological approaches. However, the design of accurate, cost-effective and scalable methods with the potential for large-area coverage that produce highly textured glass-supported CeO2 thin films remains a technological challenge. In the present work, it is demonstrated that under proper tuning conditions, the ultrasonic spray pyrolysis technique enables one to obtain glass-supported polycrystalline CeO2 films with noticeable texture along both the (100) and (111) directions, as well as with randomly oriented crystallites (no texture). The influence of flow rates, solution molarity, and substrate temperature on the texture and morphological characteristics, as well as optical absorption and Raman response of the deposited films, is evaluated. The obtained results are discussed on the basis of the combined dependence of the CeO2-exposed surfaces on the thermodynamic stability of the corresponding facets and the reaction kinetics, which modulate the crystallite growth direction.

Electrochromic performance of the mixed V2O5–WO3 thin films synthesized by pulsed spray pyrolysis technique

2014 ◽  
Vol 14 (3) ◽  
pp. 389-395 ◽  
Author(s):  
C.E. Patil ◽  
N.L. Tarwal ◽  
P.R. Jadhav ◽  
P.S. Shinde ◽  
H.P. Deshmukh ◽  
...  
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Wo3 Thin Films
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