Polarized emission from self-organized low-molecular-weight liquid crystals with the aid of hole-injecting materials
Polarized emission from self-organized low-molecular-weight liquid crystals with the aid of hole-injecting materials
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空穴注入材料辅助自组织低分子液晶的偏振发射
DOI：
10.1063/1.1621726
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Y. Shirota
中科院分区：
文献类型：
--
作者：
Masuki Kawamoto;H. Mochizuki;T. Ikeda;Bong Lee;Y. Shirota
研究了由恶二唑部分作为电子传输单元和胺部分作为空穴传输单元组成的低分子量液晶（LC）的电致发光（EL）性能。液晶最显着的特点是具有双极载流子传输能力。双极液晶使得制造简单的电致发光器件成为可能。我们制作了具有氧化铟锡 (ITO)/LC/MgAg 配置的 EL 器件（单元间隙：2 μm）。该器件在10 V以上发射可见光。特别是，含有聚(3,4-乙撑二氧噻吩)/聚(苯乙烯磺酸)(PEDOT)作为空穴注入层的EL器件的亮度和电流密度值分别比没有PEDOT层的ITO/LC/MgAg器件高10倍和6倍。此外，摩擦具有ITO电极和PEDOT层的玻璃基板的表面以使介晶取向。 ITO/摩擦 PEDOT/LC/MgAg 装置发射的二向色比估计为...
Electroluminescent (EL) properties of a low-molecular-weight liquid crystal (LC), which is composed of an oxadiazole moiety as an electron-transporting unit and an amine moiety as a hole-transporting unit, were investigated. The most significant characteristic of the LC is to possess bipolar carrier-transporting abilities. The bipolar LC makes it possible to fabricate a simple EL device. We fabricated an EL device (cell gap: 2 μm) with configuration of indium tin oxide (ITO)/LC/MgAg. The device emitted visible light at above 10 V. In particular, the values of luminance and current density of an EL device containing poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonic acid) (PEDOT) as a hole-injecting layer were ten and six times higher than those of the ITO/LC/MgAg device without the PEDOT layer, respectively. Furthermore, surfaces of the glass substrate with an ITO electrode and a PEDOT layer were rubbed to align mesogens. Dichroic ratio of the emission from an ITO/rubbed PEDOT/LC/MgAg device was estima...