dc.contributor.authorDivayana, Yogaen_US
dc.identifier.citationDivayana, Y. (2008). Optimizing electro-luminescence processes in organic light-emitting diodes. Doctoral thesis, Nanyang Technological University, Singapore.
dc.description.abstractOrganic electronic and photonic devices have attracted great attention in recent years due to their unique properties. From electronic point of view, organic materials show capability similar to their inorganic counterpart of transporting charges, producing light and even magnetism. Mechanically, organic is a soft material which can be processed at low temperature. This thesis focuses on the photonic side of the technology – the organic light-emitting diode (OLED). OLED makes use of organic material to produce light by injecting both holes and electrons from two different terminals, respectively. Before emission of light, the electron and hole recombine to form a quasi-particle called the excitons. During this process, not all the carriers contribute to the recombination. The reason for this is the imbalance of carrier injection and transportation within the device. Firstly, we investigate the controversial role of copper-phthalocyanines which is commonly used to balance the carriers. We also introduce two different methods to solve the electron-hole imbalance problem: (1) by adding a thin layer of hole blocking layer to truly block hole-carrier within the device, (2) by using an electron transporting layer to also block the hole-carrier to balance the carrier. Recombination of electron and hole is occurred in the area called the emission layer.en_US
dc.format.extent205 p.en_US
dc.subjectDRNTU::Engineering::Electrical and electronic engineering::Semiconductorsen_US
dc.subjectDRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonicsen_US
dc.titleOptimizing electro-luminescence processes in organic light-emitting diodesen_US
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.contributor.supervisorSun Xiaoweien_US
dc.description.degreeDOCTOR OF PHILOSOPHY (EEE)en_US

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