Fabrication and characterization of organic light emitting diodes for display applications

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Title: Fabrication and characterization of organic light emitting diodes for display applications
Author: Vyavahare, Omkar
Abstract: Organic Light Emitting Diodes (OLEDs) based on the principle of electroluminescence, constitute a new and exciting emissive display technology for flat panel displays. In order to attain high quantum efficiency for electroluminescence, it is necessary to achieve three attributes: efficient charge injection from the electrodes at low drive voltage, good charge balance, and confinement of the injected charge carriers within the emitting layers. The purpose of this research work was to fabricate, measure and analyze OLEDs based on these fundamental principles using different cathode materials, injection layers and buffer layers in order to determine the best possible configuration. Starting from a simple bi-layered device, multilayered heterojunction OLEDs were built by employing energy band engineering. Since it was the first time that these imaging devices were being built in our Laboratory, developing tools and techniques to get reproducible OLEDs was a prerequisite to the realization of this goal. Thus, through this process, the Lab's capability was realized from the fabrication and characterization perspective, and fundamental knowledge regarding the operation of OLEDs was gained. The OLEDs fabricated were of high efficiency and brightness, and their properties match well with the published literature.
Record URI: http://hdl.handle.net/1850/11777
Date: 2009-08-26

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