Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 45 for “"Electroluminescent"”.
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Alternating current electroluminescent properties of zinc sulfide powders
In order to investigate the alternating current electroluminescent properties of zinc sulfide powders the following experiments were conducted: synthesis of zinc sulfide phosphors (comprised of zinc, sulfur and copper dopant); thermal shocking of phosphor materials (sudden cooling, using liquid …
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Fabrication of electroluminescent silicon diodes by plasma ion implantation
… thesis describes the fabrication and testing of electroluminescent diodes made from silicon subjected to plasma ion implantation. A silicon-compatible, electrically driven light source is desired to increase the speed and efficiency of short-range data transfer in the communications and computing …
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Exciton dynamics in organic semiconductors for efficient electroluminescent devices
In this thesis, new approaches to realise efficient and stable visible and near-infrared (NIR) electroluminescence (EL) devices are explored by controlling exciton energy transfer and charge transport in organic semiconductors. In the first part of the thesis, ‘hyperfluorescence’, which is the …
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Characterisation and optimisation of alternating current thin film electroluminescent displays
… characterisation and optimisation of Thin Film Electroluminescent (TFEL) devices and Laterally Emitting Thin Film Electroluminescent (LETFEL) devices with respect to device lifetime and aging. Post deposition localised laser annealing as an alternative to thermal annealing has been previously …
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Nanowire-Based Alternating Current Oxide Powder Electroluminescent Materials and Devices
A novel type of alternating-current (AC) powder electroluminescent (EL) device that relies on nanowire-phosphor heterogeneous junction structure has been developed. It shows promise for manufacturing of highly stable powder EL devices. To pursue this goal, manganese ion (Mn2+)-doped zinc germanate …
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Growth optimisation and laser processing of thin film phosphors for electroluminescent displays
… of ZnS:Mn thin film phosphors used in Thin Film ELectroluminescent (TFEL) and Laterally Emitting TFEL (LETFEL) devices, examining techniques for phosphor growth optimisation and post deposition processing in order to strengthen development of novel TFEL devices. To achieve this, thin films of …
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Synthesis and characterization of nanocrystalline CuCl hybrid films for electroluminescent device fabrication.
… higher field regions. The device showed bright electroluminescent emission at ~384 nm when subjected to an AC voltage of about 100 volts peak to peak. One challenge linked with the use of CuCl is that it is sensitive to moist air, i.e. CuCl is not stable in ambient conditions; it forms …
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Light-emitting devices with polynorbornenes containing blue electroluminescent and charge-transport functional units
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1999.
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Parylene-based chemical vapor deposition of electroluminescent polymer films used in polymer light emitting diodes
… conditions on the properties of the conjugated electroluminescent polymer poly(p-phenylene vinylene) (PPV) prepared by parylene-based chemical vapor deposition (CVD) are explored in this thesis. A reactor for CVD of PPV is designed and constructed, and both a,a'-dibromo p-xylene and …
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Fabrication and characterization of hybrid organic/inorganic electroluminescent devices based on cadmium selenide nanocrystallites (quantum dots)
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1997.
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Thermal pumping of light-emitting diodes
… greater than one, which corresponds to electroluminescent cooling of the diode lattice. Thermal pumping and electroluminescent cooling will be studied through numerical modeling and experiment. Our results include the first ever experimental demonstration of electroluminescent cooling in …
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The establishment of the oligomeric purity and molecular structure for n-methylated bis(8-hydroxyquinoline) zinc (n = 0, 2, 4, and 5)
Znq2 has been studied as electroluminescent material. However, no correlation of the structure of Znq2 to resulting device properties has been established. Most reports of Znq2 as an electroluminescent material have not considered the impact of higher order molecular structures on the device …
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Laterally Current-Injected Membrane Photonic Crystal Emitters
Spontaneous electroluminescent emission modified by the photonic crystal is demonstrated. Details of the design, fabrication, and characterization required to create the laterally injected photonic crystal emitter are presented. It is found that photonic crystals offer a wide design space for …
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Towards the efficiency limit of visible light-emitting diodes
… mode of solid-state lighting by incoherent electroluminescent radiation and with the focus on gallium-nitride (GaN) technologies, we experimentally demonstrate a thermally enhanced blue LED operating in the low bias regime, and theoretically investigate the characteristics and criteria for …
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Halide Perovskite and Perovskite-Inspired Light Emitters: Synthesis and Optical Spectroscopy
… have yet prevented the fabrication of an electroluminescent, white light-emitting diode composed of a red-, green-, and blue-emitting lead halide perovskite layer. In this thesis, the fabrication and optical characterisation of a trichromatic (red, green, blue) all lead halide perovskite …
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Liquid crystalline semiconductors for organic electronics
… use as hole-transport, electron-transport and electroluminescent materials. Many of these materials exhibit nematic phases, which is beneficial for alignment due to the lower viscosity present in the nematic phase compared to the smectic phase. Columnar LCs with low melting points were …
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Growth of a silicon-gallium phosphide heterojunction by liquid and vapour phase epitaxial techniques.
… the small cost of the silicon substrates and the electroluminescent properties of the gallium phosphide layer, low cost L E D's could be produced. The gallium phosphide display and the silicon display driver could also be incorporated on the one chip. With the reduction in mechanical bonds and the …
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