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Showing 1 to 20 of 66 for “"charge injection"”.
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Electronic charge injection and transport in organic field-effect transistors
… a better understanding of the nature of charge transport in these devices and the physics of contacts is crucial to further development of optoelectronic organic devices. This work outlines our findings in understanding and characterizing the injection and transport mechanisms of charge …
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Characterization of ultrathin gate dielectrics and multilayer charge injection barriers
… useful. In this work, a leakage compensated charge measurement is developed to overcome this difficulty. This technique produces static C-V curves, even for oxides as thin as 24 A, thereby permitting C-V characterization well into the direct tunneling regime. As an extension of this leakage …
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Ultrafast charge injection dynamics in quantum dot sensitized metal oxides
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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Mechanisms of charge injection and transport in trischelated ruthernium(II) complexes for light-emitting device applications
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1999.
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Microstructural Modification in Nanocrystalline Silicon Due to Selective Charge Injection: A Current-sensing Atomic Force Microscopy Study
… the phenomena and processes involved in charge transport. Recombination of electron-hole pairs can increase the defects in nc-Si:H which can lead to low efficiency in solar cells as well as instability in performance of thin film transistors. Hence studies of defect creation mechanisms …
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The Development of Coulostatic Charge Injection Techniques for High Performance Liquid Chromatography Analysis (Electrochemistry, Detection, Amperometry, Hplc)
The use of coulostatic charge injection techniques for the detection of electroactive species separated using high performance liquid chromatography is examined. The techniques examined include the single pulse technique in which the slope of the potential decay is correlated to concentration and …
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Development of hybrid inorganic-organic light-emitting devices with metal oxide charge transport layers
… the device operational lifetime. Balanced charge injection and transport is vital for improving the device efficiency which demands for selection of better charge injection and transport materials. In addition imbalanced charge injection also degrades the device via joule's heating and …
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In vitro feasibility testing of floating light-activated minroelectrical stimulators
… of the main approach; investigate the charge injection capacity of titanium nitride (TiN) and iridium oxide (IrOx) as potential contact materials, and measure the transmitted light power through the neural tissue for various implantation depths. The charge injection capacity of TiN …
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A hybridized discontinuous Galerkin formulation for modeling electrohydrodynamic thrusters
… in an asymmetric capacitor by a corona discharge. This thesis presents a Hybridized Discontinuous Galerkin (HDG) formulation for solving the EHD thruster governing equations with the exception of fluid flow equations. The problem is two-way coupled and non-linear. A smoothed charge …
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Titanium nitride as an electrode material for high charge density applications
… were studied in this thesis towards improving charge density of electrodes. Titanium nitride (TiN) was sputtered in a custom designed pattern of electrodes with silicon as substrate, at a deposition rate of 2 A /sec. Atomic Force Microscopy (AFM) analysis of TiN film showed a smooth surface for …
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Radiation effects in metal-oxide-semiconductor capacitors
… breakdown is a two-stage process dominated by charge injection in a pre-breakdown stage; this is associated with localised high-field injection of carriers from the semiconductor substrate to interfacial and bulk charge traps which, it is proposed, leads to the formation of conducting channels …
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Comparative study of zinc bis-quinolates and lithium mono-quinolates: Investigation of the effect of coordination geometry on electroluminescence performance
… material the energy level-alignment affecting charge injection efficiency and charge mobility properties are of equal importance. Substitution of the 8-quinolinolato ligand or substitution of different metal ions has been shown to shift absorption and emission energies, which can modify the …
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Transient optical and electrical effects in polymeric semiconductors
… organic devices. Usually, functions such as charge injection and transport are handled by the same material which thus needs to be highly optimized. The present work contributes to expanding the knowledge on the physical mechanisms determining device performance by analyzing the role of …
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Physics and Simulation of High-Speed Heterostructure Devices
… (negative resistance field-effect transistor, charge injection transistor) transistors.
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Real-Space Transfer Transistors Grown by Metalorganic Chemical Vapor Deposition
… field-effect transistor and the charge-injection transistor, the standard GaAs electron channel is replaced with a strained-layer ln$\sb{x}$Ga$\sb{1-x}$As electron channel. With increasing indium composition in the channel, the drain current peak-to-valley ratio, at room …
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Charge Transport in Organic Electronic Devices: From Nano to Macro-Scale
… their solid-state packing, efficiency of charge injection from the electrodes, and the fabrication procedures. The length scales of interest can also vary widely, ranging from a few nanometers in the case of charge transport through single molecules or two-dimensional molecular ensembles, …
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Space charge measurement and analysis in low density polyethylene films
… It is well known that the presence of space charge is one of the important factors causing premature failure of polymeric high voltage cables. Space charge surveillance is becoming the most general applied skill to evaluate polymeric materials, particularly high voltage cables. The well-known …
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