Influence of Spraying Time on the Electrical, Morphological, Optical, and Structural, Properties of Nanocrystalline Zinc Oxide Thin Solid Films Obtained by Ultrasonic Spray Pyrolysis Technique

2019 ◽  
Vol 11 (6) ◽  
pp. 800-807
Author(s):  
L. Castañeda
Keyword(s):  
Zinc Oxide ◽  
Spray Pyrolysis ◽  
Structural Properties ◽  
Spray Pyrolysis Technique ◽  
Ultrasonic Spray Pyrolysis ◽  
Thin Solid Films ◽  
Solid Films ◽  
Ultrasonic Spray Pyrolysis Technique ◽  
Ultrasonic Spray ◽  
Nanocrystalline Zinc Oxide

scholarly journals Electroluminescent Devices Based on Junctions of Indium Doped Zinc Oxide and Porous Silicon

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
F. Severiano ◽  
G. García ◽  
L. Castañeda ◽  
J. M. Gracia-Jiménez ◽  
Heberto Gómez-Pozos ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Porous Silicon ◽  
Spray Pyrolysis Technique ◽  
Visible Region ◽  
Electrical Characterization ◽  
Ultrasonic Spray Pyrolysis ◽  
Hole Injection ◽  
Electroluminescent Devices ◽  
Ultrasonic Spray Pyrolysis Technique ◽  
Ultrasonic Spray

Electroluminescent devices (ELD) based on junctions of indium doped zinc oxide (ZnO:In) and porous silicon layers (PSL) are presented in this work. PSL with different thicknesses and photoluminescent emission, around 680 nm, were obtained by anodic etching. PSL were coated with a ZnO:In film which was obtained by ultrasonic spray pyrolysis technique. Once obtained, this structure was optically and electrically characterized. When the devices were electrically polarized they showed stable electroluminescence (EL) which was presented as dots scattered over the surface. These dots can be seen with the naked eye. The observed EL goes from the 410 to 1100 nm, which is formed by different emission bands. The EL emission in the visible region was around 400 to 750 nm, and the emission corresponding to the infrared part covers the 750 to 1150 nm. The electrical characterization was carried out by current-voltage curves(I-V)which show a rectifying behavior of the devices. Observed electroluminescent dots are associated with the electron-hole injection into quantized states in PS as well as the emission from the ZnO:In film.

Fabrication and Characterization of Various Calcium Phosphate Powders by Ultrasonic Spray Pyrolysis Technique

2006 ◽  
Vol 317-318 ◽  
pp. 57-60
Author(s):  
H.J. Wang ◽  
Young Keun Jeong ◽  
Kyung Sik Oh ◽  
B.H. Kim ◽  
Seong Hee Lee ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Calcium Phosphate ◽  
Spray Pyrolysis ◽  
Single Phase ◽  
Spray Pyrolysis Technique ◽  
Calcium Phosphates ◽  
Ultrasonic Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis Technique ◽  
Starting Solution ◽  
Ultrasonic Spray

To overcome the difficulty of preparing the stoichiometric single phase calcium phosphate materials, ultrasonic spray pyrolysis was used to fabricate various calcium phosphates. Effect of the initial Ca/P ratios and pyrolysis temperature were investigated in preparation of single phase materials. Also thermal stability of the obtained powders was estimated with the heat treatment in the air. Crystallinity of the powders was analyzed using XRD and FT-IR. The HAp and β-TCP powders with single phase could be obtained from their stoichiometric Ca/P ratios of 1.50 and 1.67, respectively. These single phase powders with good crystallinity and stoichiometry were stable with respect to heat treatment up to 1000oC. The particle size of these powders would be controlled by the concentration of starting solution.

White, blue, violet, and other colors from Tm3+/Tb3+/Eu3+ co-doped polymorph SrAl2O4 films, deposited by ultrasonic spray pyrolysis technique

2021 ◽  
Vol 122 ◽  
pp. 111737
Author(s):  
R.M. Calderón-Olvera ◽  
M. García-Hipólito ◽  
O. Álvarez-Fregoso ◽  
M.A. Álvarez-Pérez ◽  
A. Báez-Rodriguez ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Ultrasonic Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis Technique ◽  
Ultrasonic Spray ◽  
Co Doped
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