ORGANIC ELECTROLUMINESCENT ELEMENT, ELECTRONIC DEVICE, LIGHT EMITTING DEVICE, AND LIGHT EMITTING MATERIAL

• US 20160268516A1
• Filed: 08/14/2014
• Published: 09/15/2016
• Est. Priority Date: 08/16/2013
• Status: Abandoned Application

• Current Assignee: Konica Minolta Inc.
• Original Assignee: Konica Minolta Inc.
• Inventors: TANAKA, Tatsuo, TAKA, Hideo, KITA, Hiroshi
• Application Number:
  US14/911,978
• Publication Number:
  US 20160268516A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C07D 209/86 with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the ring system
• CPC Class Codes: C07D 307/91 Dibenzofurans; Hydrogenated dibenzofurans
• CPC Class Codes: C07D 333/76 Dibenzothiophenes
• CPC Class Codes: C07D 401/14 containing three or more hetero rings
• CPC Class Codes: C07D 405/04 directly linked by a ring-member-to-ring-member bond
• CPC Class Codes: C07D 405/14 containing three or more hetero rings
• CPC Class Codes: C07D 409/14 containing three or more hetero rings
• CPC Class Codes: C07D 471/04 Ortho-condensed systems
• CPC Class Codes: C07D 471/06 Peri-condensed systems
• CPC Class Codes: C07D 471/14 Ortho-condensed systems
• CPC Class Codes: C07D 487/06 Peri-condensed systems
• CPC Class Codes: C07D 487/14 Ortho-condensed systems
• CPC Class Codes: C07D 495/04 Ortho-condensed systems
• CPC Class Codes: C07D 498/04 Ortho-condensed systems
• CPC Class Codes: C07D 498/06 Peri-condensed systems
• CPC Class Codes: C07D 519/00 Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups C07D453/00 or C07D455/00
• CPC Class Codes: C09K 11/025 non-luminescent particle coatings or suspension media
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1007 Non-condensed systems
• CPC Class Codes: C09K 2211/1029 containing one nitrogen atom as the heteroatom
• CPC Class Codes: C09K 2211/1088 : containing oxygen as the only heteroatom
• CPC Class Codes: H10K 2101/20 : Delayed fluorescence emission
• CPC Class Codes: H10K 50/11 : characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 85/342 : comprising iridium
• CPC Class Codes: H10K 85/40 : Organosilicon compounds, e.g. TIPS pentacene
• CPC Class Codes: H10K 85/615 : Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
• CPC Class Codes: H10K 85/622 : containing four rings, e.g. pyrene
• CPC Class Codes: H10K 85/624 : containing six or more rings
• CPC Class Codes: H10K 85/626 : containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene
• CPC Class Codes: H10K 85/631 : Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
• CPC Class Codes: H10K 85/636 : comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom
• CPC Class Codes: H10K 85/653 : comprising only oxygen as heteroatom
• CPC Class Codes: H10K 85/654 : comprising only nitrogen as heteroatom H10K85/652 takes precedence
• 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 objective of the present invention is to provide: an organic electroluminescent element which has high efficiency and a long service life; and an electronic device and a light emitting device, each of which is provided with the organic electroluminescent element. Another objective of the present invention is to provide a light emitting material which has high efficiency and a long service life. An organic electroluminescent element according to the present invention comprises at least one organic layer that is interposed between a positive electrode and a negative electrode. This organic electroluminescent element is characterized in that: at least one organic layer contains a fluorescent compound and a host compound; the internal quantum efficiency by electrical excitation of the fluorescent compound is 50% or more; the half-value width of the emission band of an emission peak wavelength in the emission spectrum of the fluorescent compound at a room temperature is 100 nm or less; and the host compound has a structure represented by general formula (I).

Claims

1. An organic electroluminescent element comprising at least one organic layer interposed between an anode and a cathode,

wherein the at least one organic layer contains a fluorescent compound and a host compound;

the fluorescent compound has an internal quantum efficiency of 50% or more by electrical excitation;

the fluorescent compound has a half bandwidth of 100 nm or less in an emission band of an emission maximum wavelength in an emission spectrum of the fluorescent compound at a room temperature; and

the host compound contains a structure represented by Formula (I),

2. An organic electroluminescent element described in claim 1,

wherein the host compound containing a structure represented by Formula (I) contains a structure represented by Formula (II),

3. An organic electroluminescent element described in claim 1,

wherein the host compound contains a carbazole structure.

4. An organic electroluminescent element described in claim 1,

the at least one organic layer is a light emitting layer.

5. An electronic device provided with an organic electroluminescent element described in claim 1.

6. A light emitting device provided with an organic electroluminescent element described in claim 1.

7. A light emitting material comprising a fluorescent compound and a host compound,

wherein the fluorescent compound has an internal quantum efficiency of 50% or more by electrical excitation;

the fluorescent compound has a half bandwidth of 100 nm or less in an emission band of an emission maximum wavelength in an emission spectrum of the fluorescent compound at a room temperature; and

the host compound contains a structure represented by Formula (I),

8. A light emitting material described in claim 7,

wherein the host compound containing a structure represented by Formula (I) contains a structure represented by Formula (II),