ORGANIC ELECTROLUMINESCENT ELEMENT, LIGHT-EMITTING MATERIAL FOR ORGANIC ELECTROLUMINESCENT ELEMENT, AND LIGHT-EMITTING DEVICE, DISPLAY DEVICE, AND ILLUMINATION DEVICE USING SAID ELEMENT

• US 20140239280A1
• Filed: 08/06/2012
• Published: 08/28/2014
• Est. Priority Date: 08/18/2011
• Status: Active Grant

• Current Assignee: UDC Ireland Limited (Universal Display Corporation)
• Original Assignee: UDC Ireland Limited (Universal Display Corporation)
• Inventors: Takada, Saki, Yamamoto, Yosuke, Ise, Toshihiro, Kitamura, Tetsu, Watanabe, Toru, Sotoyama, Wataru, Takaku, Koji, Nomura, Kimiatsu
• Granted Patent: US 9,691,988 B2
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1007 Non-condensed systems
• CPC Class Codes: C09K 2211/1011 Condensed systems
• CPC Class Codes: C09K 2211/1033 with oxygen
• CPC Class Codes: C09K 2211/1044 containing two nitrogen atoms as heteroatoms
• CPC Class Codes: C09K 2211/1059 containing three nitrogen atoms as heteroatoms
• CPC Class Codes: C09K 2211/1088 containing oxygen as the only heteroatom
• CPC Class Codes: C09K 2211/1092 containing sulfur as the only heteroatom
• CPC Class Codes: H05B 33/14 characterised by the chemical or physical composition or the arrangement of the electroluminescent material , or by the simultaneous addition of the electroluminescent material in or onto the light source
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/12 comprising dopants
• CPC Class Codes: H10K 85/615 Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
• CPC Class Codes: H10K 85/624 containing six or more rings
• CPC Class Codes: H10K 85/636 comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom
• CPC Class Codes: H10K 85/657 Polycyclic condensed heteroaromatic hydrocarbons
• CPC Class Codes: H10K 85/6572 comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
• CPC Class Codes: H10K 85/6574 comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes
• CPC Class Codes: H10K 85/6576 comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene

Abstract

An organic electroluminescent element using a compound represented by the following general formula emits dark blue light and has a small change in the chromaticity during luminance modulation:

wherein each of R¹ to R⁸ represents a hydrogen atom or a substituent; A¹ to A⁴ represent CR³¹ or N; L and X each independently represent any one of CR³²R³³, NR³⁴, O, S, and SiR³⁵R³⁶; and each of R³¹ to R³⁶ represents a hydrogen atom or a substituent.

Claims

1. An organic electroluminescent element comprising:

a substrate;

a pair of electrodes including an anode and a cathode, disposed on the substrate; and

at least one organic layer including a light emitting layer, disposed between the electrodes,

wherein at least one kind of compound represented by the following general formula (I) is contained in any layers of the at least one organic layer;

2. The organic electroluminescent element according to claim 1, wherein X in the general formula (I) is O or S.

3. The organic electroluminescent element according to claim 1, wherein the compound represented by the general formula (I) is a compound represented by the following general formula (II):

4. The organic electroluminescent element according to claim 1, wherein the molecular weight of the compound represented by the general formula (I) is 800 or less.

5. The organic electroluminescent element according to claim 1, wherein the compound represented by the general formula (I) is contained in the light emitting layer.

6. The organic electroluminescent element according to claim 5, wherein the compound represented by the general formula (I) is a light emitting material contained in the light emitting layer.

7. The organic electroluminescent element according to claim 6, which further contains a host material in the light emitting layer.

8. The organic electroluminescent element according to claim 7, wherein the host material has a hydrocarbon fused ring structure having 10 to 50 carbon atoms.

9. The organic electroluminescent element according to claim 7, wherein the host material has an anthracene skeleton.

10. The organic electroluminescent element according to claim 1, wherein the organic layer containing the compound represented by the general formula (I) is formed by a vacuum deposition process.

11. The organic electroluminescent element according to claim 1, wherein the light emitting layer is formed by a wet process.

12. A light emitting device using the organic electroluminescent element according to claim 1.

13. A display device using the organic electroluminescent element according to claim 1.

14. An illumination device using the organic electroluminescent element according to claim 1.

15. A light emitting material for an organic electroluminescent element, represented by the following general formula (I):