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Showing 1 to 20 of 48 for “"cadmium sulfide"”.
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Photoluminescent Properties of Vacuum Deposited Cadmium-Sulfide Films
Made available in DSpace on 2015-05-12T21:41:55Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7020927.PDF: 6312385 bytes, checksum: 63ffe1be0402a5e30732b9ddea593398 (MD5) Previous issue date: 1970
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Photoluminescent properties of vacuum deposited cadmium sulfide films
… involved in the transition. Baking in saturated cadmium vapor at 500 C quenched the green emission, and for films baked in H2 S at 600 C, emission similar to that observed in pure CdS was obtained. The blue emission peak observed in the films was at 4892 R at 77°K, which is in the fundamental …
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Electronic Structures of Cadmium Sulfide and Zinc Oxide
… a.ll-electron energy band calculation of cadmium sulfide uSing ~ initio Hartree-Fock theory with nonlocal exchange is presented. Both polarization and relaxation corrections are included, and the resulting band structure is compared with the available optical data. The band gap is found to …
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Structural, electronic and optical properties of cadmium sulfide nanoparticles
… linear-response theory have been performed on cadmium sulfide nanoparticles considering different stoichiometries, underlying crystal structures (zincblende, wurtzite, rocksalt), particle shapes (spherical, cuboctahedral, tetrahedral), and saturations (unsaturated, partly saturated, completely …
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Phonon Scattering From Substitutional Impurities and Lattice Defects in Cadmium-Sulfide
Made available in DSpace on 2015-05-12T21:41:50Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6910799.PDF: 2471982 bytes, checksum: d9938384dcc01ec6e7c50c7698e0ae7c (MD5) Previous issue date: 1968
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Phonon scattering from substitutional impurities and lattice defects in cadmium sulfide
… measured from 1.4°K to 80 0K for doped and pure cadmium sulfide single crystals of the wurtzite structure. The crystals were grown by a modified Bridgeman technique under 100 atmospheres of argon at 1100°C by the Eagle Picher Corporation. The experimental results for the pure crystals indicate …
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Mechanism and Applications of large and persistent photoconductivity in cadmium sulfide
Photoconductivity is the phenomenon where electrical conductivity changes as a result of photoexcitation of new charge carriers. In some semiconductors, photoconductivity is accompanied with enormous conductivity change and long decay time after photoexcitation is ceased. This effect is called …
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Transition Metal Chalcogenide (Cadmium Sulfide) Nanoparticles: (Bio)synthesis, Characterization and Photoelectrochemical Performance
<p>Cadmium sulfide (CdS) is one of the most commonly used and studied II/VI semiconductor materials due to its electron energy band structure with desirable band edges and direct band gap. CdS nanoparticles (NPs) are widely applied in different areas such as biosensing, antibacterial agents, …
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Luminescence of Cadmium Selenide and Cadmium-Sulfide and the Influence of Defects
Made available in DSpace on 2014-12-10T19:06:58Z (GMT). No. of bitstreams: 1 7219789.pdf: 5537007 bytes, checksum: fd1876ee39bf9d8d6b4ed0f50eb72ce8 (MD5) Previous issue date: 1972
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Optimization and Purification of Cadmium Sulfide Quantum Dots Biosynthesized by the Fungus Fusarium Oxysporum
Cadmium sulfide (CdS) quantum dots have been synthesized extracellularly by the fungus Fusarium oxysporum when treated with CdSO4 in aqueous conditions. The quantum dots produce an emission range primarily between 450 and 550 nm. Optimization into the production system reveals that quantum dots are …
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Experimental and DFT study on selective oxidation of 5-Hydroxymethyl furfural over cadmium sulfide catalyst
Catalytic conversion of biomass or biomass derived intermediate to value added chemicals is a way to reduce dependency on conventional fossil fuels. Oxidation of 5-hydroximethyl furfural (HMF) is considered one of the most important biomass conversions, which resulted into value added …
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Experimental validation of the predicted emergent magnetism in diamagnetic cadmium sulfide (Cds) doped with boron
The large and persistent photoconductivity displayed by some semiconductors provides a way to control magnetism with light, through illumination-control of free carrier concentration and thereby magnetic interaction in dilute magnetic semiconductors. CdS is a wide band-gap semiconductor that …
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The Effects of High Pressure on The Photovoltage Spectrum of Cadmium-Sulfide and Cadmium-Selenide Schottky Diodes
The effects of high pressure to 10 kilobars on the photovoltage spectrum of CdS and CdSe Schottky diodes has been investigated. These diodes exhibit a photovoltage at photon energies less than the energy gap of the semiconductor. This photovoltage is due to excitation of electrons from interface …
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Effect of synthesis conditions on large and persistent photoconductivity in chemical bath deposited cadmium sulfide thin films
Persistent photoconductivity (PPC) has been observed in numerous semiconductors and dielectrics. It refers to the phenomenon that photoconductivity can last for a long time after photo-excitation is terminated. In most cases, the causes of PPC are unknown, and the connections between synthesis …
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The effect of magnetic pinch pressure on boron nitride, cadmium sulfide, graphite, silica glass, and some other materials.
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1970.
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The testing of semiconductor-based adsorption modified photosensitive sensors for their response to a volatile organic compound, oxygen, humidity, and heating
… (approximately 0.5 microns and 4.5 microns) of a cadmium sulfide layer coated with Rhodamine B fluorescent dye on a glass substrate, were tested for change in photoconductivity due to exposure to different concentrations of gaseous organic molecules in the parts-per-million (ppm) range. It was …
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Processing of CdS/CdTe solar cell and the growth model of CdTe thin film
Cadmium telluride is the only thin film photovoltaic (PV) technology to surpass crystalline silicon PV in the cost. The most common CdTe solar cells consist of a simple p-n heterojunction structure containing a p-doped CdTe layer and n-doped cadmium sulfide (CdS) layer, which acts as a window …
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Hybrid optoelectronics with colloidal nanocrystals
… of the exciton dynamics in colloidal spherical cadmium sulfide CdS nanocrystals (NC) in the vicinity of a single indium gallium nitride InGaN quantum well (QW) in dependence of temperature. QWs of the alloy material InGaN exhibit a dependence of the exciton dimensionality on the thermal energy …
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Towards Artificial Photosynthesis: Yeast-Inorganic Hybrid System
… hybrid system that utilizes otherwise toxic cadmium waste to favor reduced product formation in yeast. In this work, we build on a system we recently developed to collect and remediate heavy metals from solution through genetic engineering of the yeast Saccharomyces cerevisiae. Yeast are …
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Environmental remediation and biofuel production through nanoparticle stimulation of yeast
… transfer stimulated by biologically produced cadmium sulfide nanoparticles and light. This work provides a basis on which to improve the production of many metabolites and products through endogenously produced nanoparticles.
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