학술논문
Fundamental emission characteristics of light-emitting liquid crystal cells with rubrene-doped 4-cyano-4'-pentylbiphenyl.
Document Type
Article
Source
Subject
*NEMATIC liquid crystals
*ORGANIC light emitting diodes
*ELECTROCHEMILUMINESCENCE
*THICKNESS measurement
*DOPED semiconductors
*FLUORINATION
*TEMPERATURE effect
*POLYCYCLIC aromatic hydrocarbons
*DIPHENYL
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Language
ISSN
0947-8396
Abstract
We have investigated the light emission properties in rubrene-doped nematic liquid crystal (LC) cells from the following three standpoints: (i) effect of the heating temperature during the sample preparation, (ii) role of the emissive LC layer thickness, and (iii) role of different LC types used as the emissive layer. As a result, the light-emitting LC cells simultaneously exhibit the features of electrochemiluminescent cells (the carrier transport is governed by an ionic conduction) as well as of organic light-emitting diodes (the luminance strongly depends on the emissive layer thickness). Furthermore, we report that devices with cyano group containing LCs exhibit higher luminance compared to a fluorinated LC. [ABSTRACT FROM AUTHOR]