X-ray Diffraction Analysis of the Angular Stability of Self-Catalyzed GaAs Nanowires for Future Applications in Solar-Light-Harvesting and Light-Emitting Devices

2019 ◽  
Vol 2 (2) ◽  
pp. 689-699 ◽  
Author(s):  
Seyed Mohammad Mostafavi Kashani ◽  
Dominik Kriegner ◽  
Danial Bahrami ◽  
Jonas Vogel ◽  
Arman Davtyan ◽  
...  
Keyword(s):  
Diffraction Analysis ◽  
Light Harvesting ◽  
Angular Stability ◽  
Solar Light ◽  
X Ray Diffraction ◽  
Light Emitting ◽  
X Ray ◽  
Light Emitting Devices ◽  
Gaas Nanowires

Impact of various reactant concentrations on the morphology and photoluminescence property of synthetic ZnO nanobelts

2017 ◽  
Vol 31 (35) ◽  
pp. 1750337
Author(s):  
Guoxuan Qin ◽  
Yanan Wang ◽  
Shentong Mo ◽  
Xing Fu ◽  
Hui Wang ◽  
...  
Keyword(s):  
Photoluminescence Property ◽  
Xrd Analysis ◽  
Maximum Temperature ◽  
X Ray Diffraction ◽  
Light Emitting ◽  
X Ray ◽  
Light Emitting Devices ◽  
Uv Emission ◽  
Zno Nanomaterials ◽  
Fluorescence Spectrometer

In this paper, ZnO nanobelts have been partially high-quality synthesized employing diverse reactant mass ratios between zinc acetate [Zn(AC)2] and polyvinyl alcohol (PVA) without any catalyst. The maximum temperature required for the whole reaction process is no more than 650[Formula: see text]C. The morphologies of ZnO nanomaterials fabricated from distinct reactant concentrations have been systematically investigated by means of field-emission scanning electron microscopy (FESEM). X-ray diffraction (XRD) analysis identifies that ZnO nanobelts exhibit a typical wurtzite structure. Through fluorescence spectrometer, the photoluminescence (PL) spectra generated by ZnO nanomaterials corresponding to different reactant concentrations have disparate peak intensities and luminescence wavelengths. This phenomenon indicates that novel-synthesized ZnO nanomaterial shows great potential in changing the optical properties of light-emitting devices. In addition, synthetic ZnO nanobelts exhibit excellent UV emission capability.

Structural Studies Of Epitaxial CdF2 Layers on Si(111)

1996 ◽  
Vol 441 ◽  
Author(s):  
A. Yu. Khilko ◽  
R. N. Kyutt ◽  
G. N. Mosina ◽  
N. S. Sokolov ◽  
Yu. V. Shusterman ◽  
...  
Keyword(s):  
Strain Relaxation ◽  
Optimal Growth ◽  
Misfit Strain ◽  
X Ray Diffraction ◽  
Optimal Growth Temperature ◽  
Light Emitting ◽  
X Ray ◽  
Light Emitting Devices ◽  
Transmission Electron

AbstractEpitaxial CdF2 layers, which may be used in light-emitting devices integrated with silicon, were grown by Molecular Beam Epitaxy (MBE). Characterization of the layers by Rutherford Backscattering Spectroscopy (RBS), X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM) showed that optimal growth temperature lies in the range 60–80°C. The sticking coefficient of CdF2 molecules was found to decrease at temperatures above 100°C. Different modes of misfit strain relaxation were observed above and below that temperature.

Crystallization and preliminary X-ray diffraction analysis of the light-harvesting protein phycocyanin from the thermophilic cyanobacteriumSynechococcus elongatus

2001 ◽  
Vol 57 (9) ◽  
pp. 1326-1328 ◽  
Author(s):  
Yoshiharu Toriumi ◽  
Sam-Yong Park ◽  
Hideki Hashimoto ◽  
Hiroyuki Shimizu ◽  
Masahiko Hirano ◽  
...  
Keyword(s):  
Diffraction Analysis ◽  
Light Harvesting ◽  
X Ray Diffraction ◽  
X Ray

Optical Characterization of Zinc Selenide Compound Prepared through Hydrothermal Method

2016 ◽  
Vol 846 ◽  
pp. 237-244
Author(s):  
Fakhrurrazi Ashari ◽  
Josephine Liew Ying Chyi ◽  
Zainal Abdib Talib ◽  
W. Wahmood Wan Yunus ◽  
Leong Yong Jian ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Hydrothermal Reaction ◽  
Electronic Devices ◽  
Band Gap Energy ◽  
Photovoltaic Devices ◽  
X Ray Diffraction ◽  
Light Emitting ◽  
X Ray ◽  
Light Emitting Devices

ZnSe which show a potential application in electronic devices such as photovoltaic devices, light emitting devices and photodetector have been synthesized through a hydrothermal method using ZnCl2 and Se powder as the source. In a typical synthesis, Zn2+ and Se2- ion have been prepared separately and charged into a Teflon-lined stainless steel autoclave. The hydrothermal reaction was conducted at 180 °C for 32 hours. Structural properties of ZnSe are studied by X-ray diffraction (XRD) while the optical properties of ZnSe compound are characterized through ultraviolet–visible spectroscopy (UV-Vis). From the XRD result, pure ZnSe with main XRD peak at 2θ = 27.29°, 45.30°, 53.62°, 65.88°, 72.68° has been observed. The result have been supported by the optical results where absoprtion peak at 460 nm with optical band gap energy (Eg) at 2.5 eV.

Growth and Characterization of Znsete Epilayers and Superlattices

1990 ◽  
Vol 198 ◽  
Author(s):  
M. C. Phillips ◽  
Y. Rajakarunanayake ◽  
J. O. Mccaldin ◽  
R. H. Miles ◽  
D. H. Chow ◽  
...  
Keyword(s):  
Equilibrium Phase ◽  
Wide Band ◽  
Alloy System ◽  
Miscibility Gap ◽  
X Ray Diffraction ◽  
Wide Band Gap ◽  
Light Emitting ◽  
X Ray ◽  
Light Emitting Devices ◽  
Pl Spectra

ABSTRACTLittle has been published about Te-rich ZnSexTel−x grown at low temperatures, in spite of some successes in the fabrication of wide band gap light emitting devices from ZnSeTe alloys grown at higher temperatures. We present x-ray diffraction and photoluminescence (PL) spectra for ZnSeTe epilayers and ZnSeTe/ZnTe superlattices grown by molecular beam epitaxy (MBE). These we compare with measurements on ZnTe, ZnSe and CdZnTe epilayers and on CdZnTe/ZnTe superlattices grown under similar conditions and also with data published for ZnSeTe alloys grown at high temperatures. Equilibrium phase diagrams for the ZnSeTe alloy system suggest a large miscibility gap at MBE growth temperatures; this may account for some unusual features in the (PL) spectra and for large line widths in the x-ray data. In spite of these possible miscibility problems, we find that ZnSeTe alloys luminesce brightly.

STRUCTURAL AND OPTICAL CHARACTERIZATION OF ITO/PS HETEROJUNCTION

2008 ◽  
Vol 15 (03) ◽  
pp. 301-306
Author(s):  
B. NATARAJAN ◽  
N. JEYAKUMARAN ◽  
S. RAMAMURTHY ◽  
V. VASU
Keyword(s):  
Indium Tin Oxide ◽  
Spray Pyrolysis Technique ◽  
X Ray Diffraction ◽  
Light Emitting ◽  
X Ray ◽  
Light Emitting Devices ◽  
Transparent Conducting ◽  
P Type ◽  
Luminescent Behavior

Transparent conducting indium tin oxide (ITO) films are deposited on Porous Silicon (PS) substrates by spray pyrolysis technique. In this process, the films are formed over the surface and also incorporated into the pores of PS and thereby making a protecting layer as well as a contacting terminal. Thus, the ITO/PS/ Si heterojunction light-emitting devices are fabricated. The growth of ITO on PS is thoroughly investigated by SEM and X-ray diffraction techniques. The features of growth on other substrates like single-crystal p-type (100) silicon and glass are also taken into consideration. The influence on the PS interface is correlated with the electrical and luminescent behavior of the resulting heterojunction diode structure.

Ten-Vertex Polyhedral Monocarbaborane Chemistry. The Novel High-Yield Formation of the Ten-Vertex closo Compound [6-(PMe2Ph)-closo-1-CB9H9] from the Thermolysis of [8,8-(PMe2Ph)2-nido-8,7-PtCB9H11]

1993 ◽  
Vol 58 (12) ◽  
pp. 2924-2935 ◽  
Author(s):  
Jane H. Jones ◽  
Bohumil Štíbr ◽  
John D. Kennedy ◽  
Mark Thornton-Pett
Keyword(s):  
Nmr Spectroscopy ◽  
Diffraction Analysis ◽  
High Yield ◽  
Monoclinic Space Group ◽  
The Novel ◽  
X Ray Diffraction ◽  
Metal Centre ◽  
X Ray ◽  
Yield Formation ◽  
Boiling Toluene

Thermolysis of [8,8-(PMe2Ph)2-nido-8,7-PtCB9H11] in boiling toluene solution results in an elimination of the platinum centre and cluster closure to give the ten-vertex closo species [6-(PMe2Ph)-closo-1-CB9H9] in 85% yield as a colourles air stable solid. The product is characterized by NMR spectroscopy and single-crystal X-ray diffraction analysis. Crystals (from hexane-dichloromethane) are monoclinic, space group P21/c, with a = 903.20(9), b = 1 481.86(11), c = 2 320.0(2) pm, β = 97.860(7)° and Z = 8, and the structure has been refined to R(Rw) = 0.045(0.051) for 3 281 observed reflections with Fo > 2.0σ(Fo). The clean high-yield elimination of a metal centre from a polyhedral metallaborane or metallaheteroborane species is very rare.

Bis(μ-carboxylato)dienerhodium(I) Complexes - Synthesis, Characterization and Catalytic Activity

2008 ◽  
Vol 73 (8-9) ◽  
pp. 1205-1221 ◽  
Author(s):  
Jiří Zedník ◽  
Jan Sedláček ◽  
Jan Svoboda ◽  
Jiří Vohlídal ◽  
Dmitrij Bondarev ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Diffraction Analysis ◽  
Spectroscopic Methods ◽  
X Ray Diffraction ◽  
X Ray

Dinuclear rhodium(I) η2:η2-cycloocta-1,5-diene (series a) and η2:η2-norborna-2,5-diene (series b) complexes with μ-RCOO- ligands, where R is linear C21H43 (complexes 1a, 1b), CH2CMe3 (2a, 2b), 1-adamantyl (3a, 3b) and benzyl (4a, 4b), have been prepared and characterized by spectroscopic methods. Structures of complexes 2b, 3a and 4a were determined by X-ray diffraction analysis. Complexes prepared show low to moderate catalytic activity in polymerization of phenylacetylene in THF giving high-cis-transoid polymers, but they show only oligomerization activity in dichloromethane.

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