Stock material or miscellaneous articles – Composite
Patent
1995-02-08
1998-08-11
Yamnitzky, Marie
Stock material or miscellaneous articles
Composite
313504, 313506, 428457, 428690, 428704, 428917, H05B 3312
Patent
active
057925577
ABSTRACT:
Tetraaryldiamie derivatives of formula (1) are used in organic EL elements. ##STR1## R.sub.1, R.sub.2, R.sub.3, and R.sub.4 represent aryl, alkyl, alkoxy, aryloxy, amino or halogen, at least one of R.sub.1 to R.sub.4 is an, aryl group, r1, r2, r3, and r4 are 0 or an integer of 1 to 5, the sum of r1 to r4 is at least 1, R.sub.5 and R.sub.6 represent alkyl, alkoxy, amino or halogen, r5 and r6 are 0 or an integer of 1 to 4. The inventive compounds have high m.p. and high Tg and can be evaporated to deposit tranparent smooth thin films of quality which maintain a stable amorphous state are room temperature over a long term. Organic EL elements using the invertive compound in an organic compound layer, typically a hole injecting and transporting layer thereof provide uniform plane light emission and maintain a high intensity of luminescence in a stable manner over a long term. Thus the elements are fully durable and reliable.
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Extended Abstracts of 54th Autumn Meeting, 1993 of The Japan Society of Applied Physics, No. 3, 29p-ZC-7, "Characteristics of Organic EL Cells Based on Doped Hole Transport Layer", T. Fujii, et al., p. 1124.
Caoutchoucs & Plastiques Sommaire, No. 561, Jun. 1976, pp. 57-59, G. Friedmann, et al., "Polymerisation De L'Isoprene Par Catalyse Ziegler-Matta En Presence De Diamines Aromatiques".
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Inoue Tetsushi
Nakaya Kenji
TDK Corporation
Yamnitzky Marie
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