Pyrazoline dimers for hole transport materials in organic electroluminescent devices

Dimer structures of pyrazoline derivatives were synthesized in order to obtain stable films and applied to electroluminescent (EL) devices as hole transport material. A device structure of [indium-tin-oxide (ITO)/hole transport layer (HTL)/emitting layer (EML)/MgIn] was employed. When pyrazoline dim...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1995, Vol.34 (6A), p.3124-3127
Main Authors: SANO, T, FUJII, T, HISHIO, Y, HAMADA, Y, SHIBATA, K, KUROKI, K
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Display devices, liquid-crystal devices
Electroluminescence
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Optical elements, devices, and systems
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optics
Other luminescence and radiative recombination
Physics
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Summary:Dimer structures of pyrazoline derivatives were synthesized in order to obtain stable films and applied to electroluminescent (EL) devices as hole transport material. A device structure of [indium-tin-oxide (ITO)/hole transport layer (HTL)/emitting layer (EML)/MgIn] was employed. When pyrazoline dimer (PYR-D3) and tris(8-hydroxyquinolinate)aluminum ( Alq 3 ) were used as HTL and EML, respectively, the EL device showed a maximum luminance of 12400 cd/m 2 at 11 V and a maximum luminous efficiency of 1.5 l m/W at 250 cd/m 2 . This showed that pyrazoline dimers functioned well as hole transport layers.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.34.3124