Mitsubishi Kasei Corporation

Yoshiharu Sato

Tetsuo Tsutsui

Hitoshi Ono

Tetsuo Murayama

Shuichi Maeda

Shigenori Otsuka

Shogo Saito

Kazufumi Takahashi

Masayuki Yajima

Chihaya Adachi

Masashi Tashiro

Shuntaro Mataga

An organic electroluminescent device having an anode, an organic hole injection transport layer, an organic luminescent layer and a cathode formed sequentially in this order, wherein the organic hole injection transport layer contains a metal complex and/or a metal salt of an aromatic carboxylic acid.

Organic electroluminescent device

An organic electroluminescent device having an organic hole injection transport layer and an organic luminescent layer formed between two conductive layers constituting electrodes, wherein the organic hole injection transfer layer contains a hydrazone compound of the following formula (I): ##STR1## wherein A is a monovalent or bivalent organic group containing at least one aromatic hydrocarbon ring or aromatic hetero ring which may have a substituent, each of R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 is a hydrogen atom, or an alkyl, aralkyl, aromatic hydrocarbon or heterocyclic group which may have a substitutent, each of R.sup.6 and R.sup.7 is an alkyl, aralkyl, aryl, aromatic hydrocarbon or heterocyclic group which may have a substituent, l is an integer of 0 or 1, m is an integer of 0, 1 or 2, and n is an integer of 1 or 2, provided that A, R.sup.1 and the carbon atom to which R.sup.1 is bonded, or R.sup.6, R.sup.7 and the nitrogen atom to which R.sup.6 and R.sup.7 are bonded, may bond to one another to form a ring.

An organic electroluminescent device having an organic hole injection transport layer and an organic luminescent layer formed between two conductive layers constituting electrodes, wherein the organic luminescent layer contains a compound selected from the group consisting of a compound of the following formula (I): ##STR1## wherein each of A and B is an aromatic hydrocarbon group which may have a substituent, C is a nitrogen atom which may have a substituent, a sulfur atom, an oxygen atom, or a selenium atom, and D is a nitrogen atom, or a carbon atom which may have a substituent; a compound of the following formula (II): ##STR2## wherein each of E, F, G and .circle.H  is an aromatic hydrocarbon group which may have a substitutent, I is a nitrogen atom which may have a substituent, a sulfur atom, an oxygen atom, or a selenium atom, and J is a hydrogen atom, a cyano group, an amide group, an ester group, an alkyl group, a carboxyl group, an aromatic hydrocarbon group which may be substituted, or an aromatic heterocyclic group which may be substituted; and a compound having at least one group selected from the group consisting of aromatic hydrocarbon cyclic groups and aromatic heterocyclics groups, bonded directly, or via other group, to a naphthyridine skeleton of the following formula: ##STR3##

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Sagamihara, Japan

Yoshiharu Sato