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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Veröffentlicht in:	Japanese Journal of Applied Physics 1995, Vol.34 (6A), p.3124-3127
Hauptverfasser:	SANO, T, FUJII, T, HISHIO, Y, HAMADA, Y, SHIBATA, K, KUROKI, K
Format:	Artikel
Sprache:	eng
Schlagworte:	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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Zusammenfassung:	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