The Experts below are selected from a list of 36852 Experts worldwide ranked by ideXlab platform
Kijung Yong - One of the best experts on this subject based on the ideXlab platform.
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photoelectrochemical and photocatalytic properties of tungsten oxide nanorods grown by Thermal Evaporation
Materials Chemistry and Physics, 2010Co-Authors: Karuppanan Senthil, Kijung YongAbstract:Abstract Tungsten oxide (WO 3 ) nanorods were grown on W substrates by Thermal Evaporation of WO 3 powder at high temperature without using any catalyst and then by subsequent air annealing. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) investigations revealed that the synthesized WO 3 nanorods were highly dense and single crystalline. Optical absorption measurements showed that WO 3 nanorods can absorb light up to 480–500 nm. WO 3 nanorods showed good photocurrent response with maximum current density of 1.5 mA cm −2 . The photocatalytic degradation of methylene blue revealed that WO 3 nanorods have enhanced photocatalytic efficiency.
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Growth and characterization of stoichiometric tungsten oxide nanorods by Thermal Evaporation and subsequent annealing
Nanotechnology, 2007Co-Authors: Karuppanan Senthil, Kijung YongAbstract:Stoichiometric tungsten oxide (WO3) nanorods are synthesized on tungsten (W) substrates by a high-temperature, catalyst-free, physical deposition process and by subsequent annealing in oxygen atmosphere. Tungsten oxide nanorods are grown by Thermal Evaporation of WO3 powder at elevated temperature in a tube furnace. XRD, TEM and XPS analysis shows that the as-grown nanorods are single crystalline and non-stoichiometric (WOx). Annealing of WOx nanorods at 700 °C under oxygen atmosphere has led to the formation of stoichiometric WO3 as evidenced by XRD, XPS and Raman analysis.
Karuppanan Senthil - One of the best experts on this subject based on the ideXlab platform.
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photoelectrochemical and photocatalytic properties of tungsten oxide nanorods grown by Thermal Evaporation
Materials Chemistry and Physics, 2010Co-Authors: Karuppanan Senthil, Kijung YongAbstract:Abstract Tungsten oxide (WO 3 ) nanorods were grown on W substrates by Thermal Evaporation of WO 3 powder at high temperature without using any catalyst and then by subsequent air annealing. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) investigations revealed that the synthesized WO 3 nanorods were highly dense and single crystalline. Optical absorption measurements showed that WO 3 nanorods can absorb light up to 480–500 nm. WO 3 nanorods showed good photocurrent response with maximum current density of 1.5 mA cm −2 . The photocatalytic degradation of methylene blue revealed that WO 3 nanorods have enhanced photocatalytic efficiency.
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Growth and characterization of stoichiometric tungsten oxide nanorods by Thermal Evaporation and subsequent annealing
Nanotechnology, 2007Co-Authors: Karuppanan Senthil, Kijung YongAbstract:Stoichiometric tungsten oxide (WO3) nanorods are synthesized on tungsten (W) substrates by a high-temperature, catalyst-free, physical deposition process and by subsequent annealing in oxygen atmosphere. Tungsten oxide nanorods are grown by Thermal Evaporation of WO3 powder at elevated temperature in a tube furnace. XRD, TEM and XPS analysis shows that the as-grown nanorods are single crystalline and non-stoichiometric (WOx). Annealing of WOx nanorods at 700 °C under oxygen atmosphere has led to the formation of stoichiometric WO3 as evidenced by XRD, XPS and Raman analysis.
M F Alkuhaili - One of the best experts on this subject based on the ideXlab platform.
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characterization of thin films produced by the Thermal Evaporation of silver oxide
Journal of Physics D, 2007Co-Authors: M F AlkuhailiAbstract:Thin films were produced by the reactive Thermal Evaporation of pure silver oxide (AgO) in a background of molecular oxygen. The effects of the deposition rate and oxygen partial pressure on the structural, chemical, electrical and optical properties of the films were investigated. The films were characterized using x-ray diffraction, x-ray photoelectron spectroscopy, electrical resistivity and normal-incidence transmittance and reflectance. The resulting films were found to be mainly metallic with a small oxide component that increased with the oxygen partial pressure.
Ning Wang - One of the best experts on this subject based on the ideXlab platform.
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formation of zno nanostructures by a simple way of Thermal Evaporation
Applied Physics Letters, 2002Co-Authors: B D Yao, Y F Chan, Ning WangAbstract:Mass production of ZnO nanowires, nanoribbons, and needle-like rods has been achieved by a simple method of Thermal Evaporation of ZnO powders mixed with graphite. Metallic catalysts, carrying gases, and vacuum conditions are not necessary. Temperature is the critical experimental parameter for the formation of different morphologies of ZnO nanostructures. Zn or Zn suboxide plays a crucial role for the nucleation of ZnO nanostructures. The as-prepared ZnO nanowires consist of single crystalline cores and thin amorphous shells. As determined by electron diffraction, the growth direction of ZnO nanowires is [001], which has no orientation relationship with the substrate. A strong room-temperature photoluminescence in ZnO nanostructures has been demonstrated.
Ying Zhou - One of the best experts on this subject based on the ideXlab platform.
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rapid Thermal Evaporation of bi2s3 layer for thin film photovoltaics
Solar Energy Materials and Solar Cells, 2016Co-Authors: Ying Zhou, Huaibing Song, Xiaojun Zhan, Dengbing Li, Bo YangAbstract:Abstract Bi2S3 is a promising inorganic material for thin film photovoltaic application with optimum direct band gap of ~1.3 eV, strong absorption coefficient, nontoxic and simple composition. Here we introduce rapid Thermal Evaporation (RTE), a method with simple facility and extremely fast deposition speed, to produce high quality Bi2S3 films. By optimizing the substrate temperature and post-annealing process, well-crystalline, smooth and compact Bi2S3 films were obtained. The band gap, doping type and density, and photosensitivity of as-produced Bi2S3 films were revealed by a combined X-ray diffraction, Scanning electron microscopy (SEM), Raman spectrum, X-ray photoelectron spectroscopy (XPS), Energy dispersive spectroscopy (EDS), Hall effect and photoresponse measurements. Finally, a prototypical ITO/NiO/Bi2S3/Au solar cell with 0.75% power conversion efficiency was obtained, manifesting the promise of Bi2S3 as the absorber layer for thin film photovoltaics.
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Thermal Evaporation and characterization of sb2se3 thin film for substrate sb2se3 cds solar cells
ACS Applied Materials & Interfaces, 2014Co-Authors: Jie Chen, Meiying Leng, Ying Zhou, Lu Lv, Han Huang, Jiang TangAbstract:Sb2Se3 is a promising absorber material for photovoltaic cells because of its optimum band gap, strong optical absorption, simple phase and composition, and earth-abundant and nontoxic constituents. However, this material is rarely explored for photovoltaic application. Here we report Sb2Se3 solar cells fabricated from Thermal Evaporation. The rationale to choose Thermal Evaporation for Sb2Se3 film deposition was first discussed, followed by detailed characterization of Sb2Se3 film deposited onto FTO with different substrate temperatures. We then studied the optical absorption, photosensitivity, and band position of Sb2Se3 film, and finally a prototype photovoltaic device FTO/Sb2Se3/CdS/ZnO/ZnO:Al/Au was constructed, achieving an encouraging 2.1% solar conversion efficiency.
