Preliminary communication Multilayer light emitting diodes based on columnar discotics
作者:
INGA H.S TAPFF,
VOLKER STUMPFLEN,
JOACHIM H. WENDORFF,
DANIELA B. SPOHN,
DIETMAR MOBIUS,
期刊:
Liquid Crystals
(Taylor Available online 1997)
卷期:
Volume 23,
issue 4
页码: 613-617
ISSN:0267-8292
年代: 1997
DOI:10.1080/026782997208226
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Columnar discotics were used as the hole transporting layer in single layer, two layer and three layer light emitting diodes because of the unusually large hole mobility of such materials. The observations are that the onset fields are small compared with most devices using nondiscotic hole transporting layers, that these values are strongly reduced with increasing number of layers, that the orientation of the columns along the layer film normal causes a further decrease of the onset voltage and finally that the quantum efficiencies increase significantly as the number of layers is increased.
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