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 85 for “"Electroluminescence"”.
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Field Induced Polymer Electroluminescence
This work presents a new approach to electroluminescence in organics using a device employing alternating current (AC) field-induced polymer electroluminescence (FIPEL). This device consists of a transparent conductor, polymer dielectric layers, charge generation layers, a conjugated polymer-based …
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Electroluminescence and inorganic phosphor science
The research is focussed on wide bandgap 11-VI semiconductors, and more specifically on ZnS and CdS, with applications as thin film electroluminescent displays in the expanding display device market. The science of electroluminescent semiconductors and inorganic salt precipitation is combined with …
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Photonic crystal enhanced LED for electroluminescence cooling
… itself, and the phenomenon is referred to as electroluminescence cooling (ELC). Although researchers recently reported LEDs with net cooling in various wavelength, the cooling power was not sufficient to compensate the heat flux from the ambient and thus no temperature drop is observed. In …
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Electroluminescence characterization of organometallic perovskite solar cells
In this thesis, I have studied the electroluminescence (EL) properties of photovoltaic (PV) devices based on "Organometallic Perovskites" which exhibit high power conversion efficiencies of approximately 23%. Aside from single-junction current-voltage characteristics, these devices exhibit low …
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Electroluminescence in ion gel gated organic polymer semiconductor transistors
… period of time and compare the results with the electroluminescence of the device and show that the formation of the p-n junction within the polymer layer due to the penetrated ions from the gel dielectric into the polymer semiconductor layer on the application of the voltage is the cause behind …
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Estimating mobility values from electroluminescence measurements on organic polymers
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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The Design of a Scanning Tunneling Microscope for Electroluminescence Studies
… conjunction with an optical system to study the electroluminescence of nanoscale objects. The STM features (1) a parabolic mirror as the primary optical component for photon capture, (2) simplified miniature piezoelectric actuated inertial z-motors and xy-positioning stage used to position the …
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Some novel aspects of DC and AC powder electroluminescence (DCEL)
… evaluate the methods. The most suitable for DC electroluminescence (DCEL) was found to be a thioacetamide synthesis. The DCEL forming process was investigated using Laser-Raman spectroscopy. This showed no changes in copper concentration in the formed layer of a DCEL device following the forming …
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Substitution effects of metal quinolate chelate materials for organic electroluminescence applications
… in novel flat panel displays is based on electroluminescence (EL) of organic light-emitting devices (OLEDs). Aluminum tris(8-hydroxy quinoline) (Alq3)-type materials are very important as emitter materials in OLEDs. Systematic experimental and theoretical studies of these materials are …
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Modeling of electroluminescence in InSb quantum wells and inversion asymmetric effects
… and understanding of the mechanisms underpinning electroluminescence from quantum wells. The dissertation contains original contribution of methodological and phenomenological character. We have described in detail the eight band model within the envelope function approximation(EFA) using the Löwd …
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Ring-opening metathesis polymerization molybdenum(VI) alkylidene catalysts : study of steroregular polymers, copper nanoclusters, and electroluminescence-active species
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1996.
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Comparative study of zinc bis-quinolates and lithium mono-quinolates: Investigation of the effect of coordination geometry on electroluminescence performance
… to aluminum tris-quinolates and implications on electroluminescence performance will be discussed.
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Characterization of electroluminescence signals from nuclear recoil events in the dual-phase argon Time Projection Chamber of the Red experiment with Convolutional Autoencoders
… charge, with the latter measured through delayed electroluminescence signals. While conventional WIMP searches focus on masses around hundreds of GeV/c2, interest has recently expanded to lighter WIMPs, down to 1 GeV/c2. The properties of liquid argon and LAr TPC technology make them highly suited …
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Efficient light emitting devices utilizing CdSe(ZnS) quantum dots in organic host matrices
We demonstrate efficient electroluminescence from thin film structures containing core-shell CdSe(ZnS) quantum dots dispersed in molecular organic host materials. In the most efficient devices, excitons are created on the quantum dot sites via energy transfer from organic host molecules, and direct …
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Characterisation and simulation of InAs/InAsSb structures for mid-infrared LEDs
… focusing on their photoluminescence and electroluminescence spectra over the 4 – 300 K temperature range. The purpose was to gain an insight into developing mid – infrared light – emitting diodes (LEDs) operating with sufficiently high power and efficiency for room temperature gas sensing …
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Fabrication and Characterization of Electrically Injected Photonic Crystal Light Emitters
… lithography or focused ion beam nano-patterning. Electroluminescence spectra at room temperature demonstrate the effect of the photonic crystal nanocavity. Significant enhancement of the electroluminescence intensity is observed as a result of the spatial localization of the quantum well to the …
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Colloidal semiconductor nanocrystals as nanoscale emissive probes in light emitting diodes and cell biology
… scale, resulting in spectrally resolved electroluminescence from single colloidal CdSe/ZnS (core/shell) NCs at room temperature. Chapter 3 takes NCs as emissive probes in layered organic LEDs, and shows that the photoluminescence of single NCs is bias dependent which helps elucidate the …
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New Methods for the Investigation of Organic Thin-Film Devices
… on device performance. Furthermore, two modes of electroluminescence detection have been developed. Local luminescence detection in the optical near-field by a scanning near-field optical microscope allowed us to monitor the light emission around a dark spot with a resolution better than 134 nm …
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Nanolithographically defined semiconductor quantum dots
… by a current density-voltage (JV) test, electroluminescence (EL) and photoluminescence (PL) spectroscopy. The quantum confi nement is simulated by COMSOL.
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Design and Analysis for the DarkSide-10 Two-Phase Argon Time Projection Chamber
… simulations, designs, and analyses involving the electroluminescence in the gas phase from extracted ionization charge for both DarkSide-10 and DarkSide-50. This work involves the design of the HHV systems, including field cages, that are responsible for producing the electric fields that drift, …
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