Investigations of Characteristics and Device Applications of Organic Optoelectronic Semiconductors Having Liquid Crystal and Self-Assembly Properties
Date Issued
2010
Date
2010
Author(s)
Liu, Su-Hao
Abstract
OLEDs can produce polarized electroluminescence via aligning the light-emitting molecules, and the performance of organic thin-film transistors and organic photovoltaic cells can also be improved by aligning the active molecules. Liquid crystal (LC) phases can be applied to achieve these purposes.
In this thesis, we studied four organic materials possessing LC phases. In chapter two, we studied the photophysical and charge-transport properties of two self-assembly materials with LC phases. They were the first kind of their own family possessing LC properties. In chapter three, we successfully fabricated the first polarized phosphorescent OLED by using a mesogenic host/guest system. In chapter four, we reported efficient solution-processed phosphorescent OLEDs using a Pt(II) complex with LC properties and high photoluminescence (PL) quantum yields in the solid state. We truly believe that exploiting and studying the organic materials with LC properties will be a key factor to create novel organic electro-optical devices in the future.
Subjects
OLEDs
phosphorescence
polarized emission
liquid crystal
SDGs
Type
thesis
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