Composition and light-emitting element comprising the composition
A technology of light-emitting devices and compositions, applied in the directions of light-emitting materials, electric solid-state devices, semiconductor devices, etc., can solve the problems of low triplet excitation energy, low light-emitting efficiency, incompatibility, etc., and achieve excellent light-emitting efficiency and good light-emitting properties. Effect
Active Publication Date: 2009-12-23
SUMITOMO CHEM CO LTD
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- Abstract
- Description
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- Application Information
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Problems solved by technology
However, such conjugated polymers have small lowest triplet excitation energies and are therefore particularly unsuitable as substrates for emission of light with wavelengths shorter than those of green light.
For example, light-emitting materials containing polyfluorene as a conjugated polymer and a triplet light-emitting compound have low luminous efficiency (Patent Document 2 and Non-Patent Document 1)
Method used
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Embodiment 1
[0074]
Embodiment 2
[0075]
Embodiment 3
[0076]
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Abstract
Disclosed is a composition comprising a compound having a pyrazine ring structure and a phosphorescent compound, wherein the compound having a pyrazine ring structure has a pyrazine ring structure represented by the general formula (1), (2) or (3): wherein R and R 1 independently represent a hydrogen atom or a univalent group and multiple R's and multiple R1's may be the same as or different from one another. Also disclosed is a polymer having a residue derived from the phosphorescent compound and the pyrazine ring structure.
Description
technical field [0001] The present invention relates to a composition comprising a compound having a pyrazine ring structure and a phosphorescence-emitting compound, and a light-emitting device containing the composition. Background technique [0002] It is known that a light-emitting device containing a compound exhibiting light emission from a triplet excited state (hereinafter, also referred to as a "phosphorescent compound"), which is used as a light-emitting compound in the light-emitting device, has high luminous efficiency. layer of luminescent material. When a phosphorescence-emitting compound is used in a light-emitting layer, a composition obtained by adding the compound to a matrix is generally used as a light-emitting material. A polymer such as polyvinylcarbazole can be preferably used as a substrate because a thin film can be formed by coating (Patent Document 1). However, such polymers have a problem of difficulty in electron injection because the lowe...
Claims
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IPC IPC(8): C08L65/00C08G61/12C08K5/3432C09K11/06H01L51/50
CPCC08G61/122C09K2211/185C09K2211/1416C08G2261/5242C09K2211/1044H01L51/0085C08G2261/3221C08G73/0633C09K2211/1088H01L51/0052C08G2261/11C09K2211/1007H01L51/5016C09K2211/1059H01L51/0067C08G2261/3142C08K5/3462C08L65/00H05B33/14C08G2261/312C09K2211/1092H01L51/0035C08L79/04C08G2261/124H01L51/0039C09K2211/1425C09K2211/1029C09K2211/1011C09K11/06H10K85/115H10K85/111H10K85/615H10K85/654H10K85/342H10K50/11H10K2101/10C08G61/12C07D241/00H10K59/00
Inventor 秋野喜彦弗雷德里克·德尔贝克
Owner SUMITOMO CHEM CO LTD
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