Nitrogen-containing aromatic heterocyclic derivative and organic electroluminescence device using the same

一种芳香族杂环、衍生物的技术，应用在含氮芳香族杂环衍生物,有机场致发光元件领域，能够解决有机EL元件驱动电压、发光效率及耐久性不充分等问题

Inactive Publication Date: 2012-12-05
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The driving voltage, luminous efficiency, and durability of the initial organic EL elements were insufficient, and various technical improvements were made to address these problems

Method used

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  • Nitrogen-containing aromatic heterocyclic derivative and organic electroluminescence device using the same
  • Nitrogen-containing aromatic heterocyclic derivative and organic electroluminescence device using the same
  • Nitrogen-containing aromatic heterocyclic derivative and organic electroluminescence device using the same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0194] The organic EL element of this embodiment has an element structure having at least one light-emitting layer. Specific configuration examples are shown below.

[0195] (1) Anode / luminescent layer / electron injection / transport layer / cathode

[0196] (2) Anode / hole injection / transport layer / luminescent layer / electron injection / transport layer / cathode

[0197] (3) Anode / hole injection layer / hole transport layer / light emitting layer / electron injection / transport layer / cathode

[0198] In this specification, "hole injection and transport layer" refers to "one or both of the hole injection layer and the hole transport layer", and "electron injection and transport layer" refers to "the electron injection layer and the electron transport layer". one or both of the layers".

no. 2 approach

[0200] The organic EL element of this embodiment has a tandem element configuration having at least two light-emitting layers (units including light-emitting layers).

[0201] Interposing a charge generation layer (also referred to as CGL) between the two light emitting layers, an electron transport region can be provided on each cell.

[0202] Specific configuration examples of series elements are shown below.

[0203] Anode / hole injection / transport layer / fluorescence layer / charge generation layer / fluorescence layer / electron injection / transport layer / cathode

[0204] Anode / hole injection / transport layer / fluorescence layer / electron injection / transport layer / charge generation layer / fluorescence layer / cathode

[0205] Anode / hole injection / transport layer / fluorescence layer / electron injection / transport layer / charge generation layer / fluorescence layer / blocking layer / cathode

[0206] Anode / hole injection / transport layer / phosphorescent layer / charge generation layer / fluorescence la...

no. 3 approach

[0209] The organic EL element of this embodiment includes a plurality of light emitting layers, and has a charge blocking layer between arbitrary two light emitting layers of the plurality of light emitting layers.

[0210] As a preferable structure of the organic EL element according to the third embodiment, as described in Patent No. 4134280, U.S. Laid-Open Patent Publication US2007 / 0273270A1, and International Laid-Open Publication WO2008 / 023623A1, in accordance with the anode, the first light emission Layer, charge blocking layer, second light-emitting layer, and cathode are sequentially stacked, with an electron transport region having a barrier layer for preventing diffusion of triplet excitons between the second light-emitting layer and cathode. Here, the charge blocking layer refers to a layer that serves the purpose of regulating the injection of carriers into the light-emitting layer by providing an energy barrier of the HOMO level and the LUMO level between adjacent ...

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PUM

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Abstract

A nitrogen-containing aromatic heterocyclic derivative represented by the following formula, wherein X1 to X3 are a single bond, CRaRb, NRc, an oxygen atom or a sulfur atom, and when all of X1 to X3 is a single bond, at least one of Ara, Arb and Arc is an aryl group having 6 to 20 ring carbon atoms substituted with a heteroaryl group, an aryloxy group or a heteroaryloxy group, or a substituted or unsubstituted heteroaryl group having 5 to 20 ring atoms.

Description

technical field [0001] The invention relates to a nitrogen-containing aromatic heterocyclic derivative and an organic electroluminescent element using the nitrogen-containing aromatic heterocyclic derivative. Background technique [0002] Organic electroluminescent (EL) elements are expected to be used as solid-state light-emitting inexpensive large-area full-color display elements, and many developments have been made. Generally, an organic EL element is composed of a light-emitting layer and a pair of counter electrodes sandwiching this layer. When an electric field is applied between the two electrodes, electrons are injected from the cathode side and holes are injected from the anode side. Furthermore, the electrons recombine with holes in the light-emitting layer to form an excited state, and when the excited state returns to the ground state, energy is emitted in the form of light. [0003] In addition, a phosphorescent organic EL element using an organic phosphoresc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/86C07D219/02C07D401/14C07D405/14C09K11/06H01L51/50
CPCH01L51/5012H01L51/0072C09K2211/1092H01L51/0059H01L51/0071C09K2211/1029H01L51/0085C07D403/14C09K2211/1037C07D401/14C09K2211/1033C09K2211/1007H05B33/14C09K11/06C07D405/14C07D219/02C07D209/86C09K2211/1088C09K2211/1044C09B15/00C09B17/00C09B19/00C09B21/00C09B57/00H10K85/631H10K85/657H10K85/342H10K85/6572H10K50/11H05B33/20
Inventor 加藤朋希西村和树细川地潮沼田真树长岛英明
Owner IDEMITSU KOSAN CO LTD
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