Organic electroluminescent device
AssigneeHodogaya Chemical Co., Ltd.
InventorsShuichi Hayashi, Naoaki Kabasawa, Keigo Naito
Life of this patent
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Abstract
The present invention provides an organic EL device having at least an anode, a first hole transport layer, a second hole transport layer, a luminous layer, an electron transport layer, and a cathode in this order, wherein the second hole transport layer contains an arylamine compound represented by the following general formula (1), and the electron transport layer contains a pyrimidine derivative represented by the following general formula (2). The organic EL device of the present invention has a high efficiency, and is driven at a low driving voltage. Further, it has a particularly long lifetime.
Claims12
An organic electroluminescent device having at least an anode, a first hole transport layer, a second hole transport layer, a luminous layer, an electron transport layer, and a cathode in this order, wherein
- the second hole transport layer contains an arylamine compound represented by the following general formula (1), and
- the electron transport layer contains a pyrimidine derivative represented by the following general formula (2):
- where
- Ar1 to Ar4 may be identical or different, and each represents an aromatic hydrocarbon group, an aromatic heterocyclic group, or a condensed polycyclic aromatic group, and
- n1 denotes an integer of 1 to 4;
- where
- Ar5 and Ar6 may be identical or different, and each represents an aromatic hydrocarbon group, an aromatic heterocyclic group, or a condensed polycyclic aromatic group, and Ar7 represents a hydrogen atom, an aromatic hydrocarbon group, an aromatic heterocyclic group, or a condensed polycyclic aromatic group,
- wherein the aromatic hydrocarbon group, the aromatic heterocyclic group, or the condensed polycyclic aromatic group represented by Ar5 to Ar7 may be unsubstituted or may have a substituent selected from the group consisting of
- a deuterium atom, a cyano group, a nitro group, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a straight-chain or branched alkyl group having 1 to 6 carbon atoms, a straight-chain or branched alkyloxy group having 1 to 6 carbon atoms, a straight-chain or branched alkenyl group, an aryloxy group, an arylalkyloxy group, a phenyl group, a biphenylyl group, a terphenylyl group, a naphthyl group, an anthracenyl group, a phenanthrenyl group, a fluorenyl group, an indenyl group, a pyrenyl group, a perylenyl group, a fluoranthenyl group, a triphenylenyl group, a spirobifluorenyl group, an acenaphthenyl group, a pyridyl group, a thienyl group, a furyl group, a pyrrolyl group, a quinolyl group, an isoquinolyl group, a benzofuranyl group, a benzothienyl group, an indolyl group, a carbazolyl group, a benzoxazolyl group, a benzothiazolyl group, a quinoxalinyl group, a benzimidazolyl group, a pyrazolyl group, a dibenzofuranyl group, a dibenzothienyl group, an azafluorenyl group, a diazafluorenyl group, a carbolinyl group, an azaspirobifluorenyl group, a diazaspirobifluorenyl group, an arylvinyl group, and an acyl group;
- A1 and A2 may be identical or different, and each represents a divalent group formed by removing two hydrogen atoms from benzene or naphthalene,
- A3 represents a single bond, and
- B represents an aromatic heterocyclic group, which is at least one substituted or unsubstituted group selected from the group consisting of a triazinyl group, a pyridyl group, a pyrimidinyl group, a furyl group, a pyrrolyl group, a thienyl group, a quinolyl group, an isoquinolyl group, a benzofuranyl group, a benzothienyl group, an indolyl group, a carbazolyl group, a benzoxazolyl group, a benzothiazolyl group, a quinoxalinyl group, a benzimidazolyl group, a pyrazolyl group, a dibenzofuranyl group, a dibenzothienyl group, an azafluorenyl group, a diazafluorenyl group, a naphthyridinyl group, a phenanthrolinyl group, an acridinyl group, a carbolinyl group, an azaspirobifluorenyl group, a diazaspirobifluorenyl group, a bipyridyl group, a terpyridyl group, a pyrazinyl group, an imidazolyl group, a quinazolinyl group, a benzotriazolyl group, a benzothiadiazolyl group, a pyridopyrrolyl group, a pyridoimidazolyl group, a pyridotriazolyl group, a phenazinyl group, a phenoxazinyl group, and a phenothiazinyl group.
Dependencies are inferred from the claim text.