Study on grow process and optical properties of ZnO microrods synthesized by hydrothermal method

Félix-Quintero, H.; Angulo‐Rocha, Jorge; Murrieta, S. H.; Hernández, Adán; Camarillo, G.E.; Flores, J.M.C.; Alejo-Armenta, C.; Garcı́a-Hipólito, M.; Ramos-Brito, F.

doi:10.1016/j.jlumin.2016.09.049

Cited by 14 publications

(4 citation statements)

References 35 publications

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“…[37,38]. They have been synthesized through a variety of physical and chemical techniques, including: Hidrothermal/Solvothermal [39,40,41], solid-state reaction [42], sol-gel [43,44], laser ablation [45,46], sputtering [47], Pechini Method [48], plasma electrolitic oxidation [49], conventional melt-quenching method [50,51], combustion synthesis [52], solvent evaporation method [53,54,55], and co-precipitation process [56]. Among these techniques, spray pyrolysis began to be used for this purpose in the mid-1980s, and it is still used today [57,58]—proving to be a practical, low cost, easy to extrapolate for large area deposition technique.…”

Section: Luminescent Materialsmentioning

confidence: 99%

Spray Pyrolysis Technique; High-K Dielectric Films and Luminescent Materials: A Review

2018

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The spray pyrolysis technique has been extensively used to synthesize materials for a wide variety of applications such as micro and sub-micrometer dimension MOSFET´s for integrated circuits technology, light emitting devices for displays, and solid-state lighting, planar waveguides and other multilayer structure devices for photonics. This technique is an atmospheric pressure chemical synthesis of materials, in which a precursor solution of chemical compounds in the proper solvent is sprayed and converted into powders or films through a pyrolysis process. The most common ways to generate the aerosol for the spraying process are by pneumatic and ultrasonic systems. The synthesis parameters are usually optimized for the materials optical, structural, electric and mechanical characteristics required. There are several reviews of the research efforts in which spray pyrolysis and the processes involved have been described in detail. This review is intended to focus on research work developed with this technique in relation to high-K dielectric and luminescent materials in the form of coatings and powders as well as multiple layered structures.

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Section: Luminescent Materialsmentioning

confidence: 99%

Spray Pyrolysis Technique; High-K Dielectric Films and Luminescent Materials: A Review

2018

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“…In the domestic mass-produced resistor sheet, the voltage gradient is generally 400V/mm, and the leakage current is below 20uA. Although it can meet the current requirements of domestic ultra-high voltage AC and DC surge arresters, the technical level is significantly different compared with developed countries [7]- [8]. In addition, Europe is exploring new processes and material systems to minimize the adverse effects on the environment.…”

Section: Introductionmentioning

confidence: 99%

Design of microstructure and performance testing of high-pressure ZnO grain boundary layer

Xie,

Li,

Zhou

2023

Applied Mathematics and Nonlinear Sciences

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This paper firstly constructs the microstructure of the ZnO grain boundary layer of a high voltage system fits: microstructure characteristics of the ZnO varistor and conductive mechanism of the ZnO varistor. The ZnO structure can be seen as an irregular three-dimensional mesh composed of ZnO grain-high resistance grain boundary layer-ZnO grain. Then the electric field distribution of the ZnO grain boundary layer is calculated by Poisson’s equation, and the relationship curve of the space charge distribution inside the ZnO grain boundary with time is further simulated. Finally, the ZnO grain boundary performance is tested based on the bipolar carrier transport model with a double Schottky barrier, and the results show that the negative charge density at the grain boundary interface gradually decreases from 5×1025m−3 to 4.2452×1025m−3 and the initial charge value in the grain boundary region is 0m−3, and the negative charge at the grain boundary interface gradually decreases, and the negative charge in the grain boundary region gradually increases. In this study, the internal space charge distribution, Schottky barrier height and grain boundary leakage current are systematically investigated, which provides important theoretical support for the in-depth research on the conductivity mechanism, aging mechanism and performance improvement related to ZnO varistors.

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“…Therefore, the control of the shape, size, and orientation of nanostructures represents an essential task in the synthesis of functional materials with high potential in technological applications. Among the semiconductor metal oxides, ZnO is considered an industrially important material due to its excellent physical properties, for instance, direct wide-ranging bandgap, large free-exciton binding energy (BE), strong oxidation capability, and stability [1,2]. ZnO is also emerging as a potential material for photocatalytic applications [3], sensors [4], used in electronics devices [5], and solar cells [6].…”

Section: Introductionmentioning

confidence: 99%

Columnar nitrogen-doped ZnO nanostructured thin films obtained through atomic layer deposition

et al. 2021

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The present study was aimed to develop nitrogen-doped nanostructured ZnO thin films. These films were produced in a sequential procedure involving the atomic layer deposition technique, and a hydrothermal process supported by microwave heating. Employing the atomic layer deposition technique, through self-limited reactions of diethylzinc (DEZn) and H 2 O, carried out at 3.29×10 −4 atm and 190 °C, a high-quality ZnO seed was grown on a Si (100) substrate, producing a textured film. In a second stage, columnar ZnO nanostructures were grown perpendicularly oriented to the silicon substrate on those films, using a solvothermal process in a microwave heating facility, employing Zn(NO 3 ) 2 as zinc precursor, while hexamethylenetetramine (HMTA) was used to produce the bridging of Zn 2+ ions. The consequence of N-doping concentration on the physicochemical properties of ZnO thin films was studied. The manufactured films were structurally analyzed by scanning electron microscopy and x-ray diffraction. Also, x-ray photoelectron spectroscopy, Raman, and UV-vis spectroscopies were used to provide further insight on the effect of nitrogen doping. The N-doped films displayed textured wurtzite-like structures that changes their preferential growth from the (002) to the (100) crystallographic plane, apparently promoted by the increase of nitrogen precursor. It is also shown that nitrogen-doped films undergo a reduction in their bandgap, compared to ZnO. The methodology presented here provides a viable way to perform high-quality N-ZnO nanostructured thin films.

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Study on grow process and optical properties of ZnO microrods synthesized by hydrothermal method

Cited by 14 publications

References 35 publications

Spray Pyrolysis Technique; High-K Dielectric Films and Luminescent Materials: A Review

Spray Pyrolysis Technique; High-K Dielectric Films and Luminescent Materials: A Review

Design of microstructure and performance testing of high-pressure ZnO grain boundary layer

Columnar nitrogen-doped ZnO nanostructured thin films obtained through atomic layer deposition

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