thermionic emission
Current Flow in Thin Solid Films: Thermionic Emission and Tunneling
... CURRENT FLOW IN THIN SOLID FILMS THERMIONIC EMISSION AND TUNNELING Thesis by Stephen L Kurtin In Partial Fulfillment of the Requirements For the Degree of Doctor of Philosophy (Submitted September 18,[.] ...
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Simulation of room temperature thermionic emission from A1xGa-xN negative electron affinity cathodes
... a thermionic emission current density on the order of 100 A/cm 2 or more can be expected for anode voltages less than 85 V in a vacuum diode with ...
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Analysis of thermionic emission from electrodeposited Ni–Si Schottky barriers
... as free parameters, a better fit than the temperature independent SB height is achieved (dashed line in Fig. 4). The fitting values were 0.89 V and 70 K respectively. For consistency, the same Richardson constant value ...
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Thermionic Emission from Doped and Nanocrystalline Diamond
... electron emission microscopy has been employed to investigate emission behavior of these materials focusing on the dependence of the applied electric field and ...field emission at room temperature ...
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Behaviors and Characteristics Study of the Electron Beam for Lens System in a Scanning Electron Microscope
... a thermionic scanning electron microscope (SEM) and the focusing capability using a numerical computation and an optics-based ...microscopy; Thermionic emission; Numerical analysis; Beam ...
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Quantum Wells to Improve the Performance of III/V Multi-junction Solar Cells.
... To extend the absorption threshold to longer wavelengths, two main strategies can be followed: (i) increasing the quantum well thickness to reduce quantum size effects, and (ii) increasing the indium percentage in the ...
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The thermionic valve and its uses for low powered guitar amplification
... Research continues to be carried out into this area for both industrial and scientific advancement such as welding rod efficiency, and NASAs development of high-power microwave communication systems [12], another ...
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Development of the Thermionic Energy Conversion Method
... dominant emission process is the process of field emission ...only thermionic emission (TI) electrons that emitted in vacuum over barrier: metal-vacuum, as well as the TFE electrons from the ...
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Atomic Layer Deposition Grown Zinc-Oxide Based MIS-Type Schottky Barrier Diode
... Firstly, the electrical characteristics of Al/ ALD-grown ZnO/p-Si Schottky barrier diodes have been examined by using the standard thermionic emission (TE) theory. According to the TE theory, relation ...
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Thermionic Energy Conversion and Particle Detection Using Diamond and Diamond-Like Carbon Surfaces
... vacuum thermionic energy conversion device (TEC) is a type of heat engine that converts heat directly to electrical work via the phenomenon of thermionic ...back emission and space charge. Back ...
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On the modeling and simulation of novel schottky based silicon rectifiers
... ductor devices the carrier lifetimes are almost unknown and very strongly dependent on fabrication. However, for good quality bulk silicon the lifetimes are well defined. Still, the chance that our model is in agreement ...
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Quantum mechanical scattering investigation of the thermionic and field induced emission components of the dark current in quantum well infrared photodetectors
... There are three physical mechanisms that contribute to the dark current, and these are described in Fig. 1. The ground state sequential tunnelling ~ST! component involves electrons scattering from the localized state in ...
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Type II GaSb/GaAs Quantum Ring Intermediate Band Solar Cell
... optical emission cross-section were determined at low temperature from steady-state and time dependent hole emission measurements at 17 K, with values of ≈10 -13 and 10 -16 cm 2 , ...The emission ...
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High performance ternary solar cells based on P3HT:PCBM and ZnPc hybrids
... Single walled carbon nanotubes (SWCNTs) and reduced graphene oxide (rGO) covalently and non-covalently functionalised by ZnPc were added to P3HT:PCBM blend in order to investigate the effects of these hybrid materials on ...
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Electronic Transition Imaging of Carbon Based Materials: The Photothreshold of Melanin and Thermionic Field Emission from Diamond
... spontaneous emission in a broad wavelength range from infrared to X-rays and coherent radiation in the UV to the vacuum UV range ...standard thermionic cathode design, used in a modified ...below ...
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Electrical Properties of the Al/CuInSe2 Thin Film Schottky Junction
... ideal thermionic emission current model usually used [31]-[36], although the study of the temperature dependence on the current-voltage (IV) and the capacitance- voltage (CV) characteristics of these ...
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Effect of Interrupted Current Magnitude on the Arc Produced in Medium and High Voltage Systems
... field emission, thermionic emission and increase in mean free path, are current driven; by skin effect, effective conductor resistance is more for AC than for DC systems; proximity effect increases ...
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STRUCTURAl , MICROSTRUCTURAL CHARACTERIZATION & ELECTRICAL TRANSPORT STUDIES OF NANO CDS
... Because of the small size of the particles, the charge carriers reach the surface of the particles more easily enabling easy electron transfer by thermionic emission, or tunneling or bot[r] ...
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Quantum point contacts and resistive switching in Ni/NiO nanowire junctions
... Non-linear IV characteristics in filamentary conductors have been attributed to a variety of mechanisms, including Poole-Frenkel conduction, thermionic emission, and tunnel- ing. 19,24,40–43 R(T) data ...
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The laser assisted field electron emission from carbon nanostructure
... the thermionic emission taking into account multiphoton ...the emission is suppressed by the space charge for- ...The thermionic emission takes place when the laser pulse energy exceeds ...
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