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Novel red color emitting compounds and organic electroluminescent device using them

A compound and organic layer technology, applied in the field of novel red light-emitting compounds, can solve the problems that the chromaticity cannot be said to be complete, the emission color and device safety have not reached this level, etc.

Inactive Publication Date: 2006-07-05
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0030] However, in the case of a green light-emitting device, the safety of the device has been evaluated to have reached a practical level, but there is a problem with a red light-emitting device in that the emission color and the safety of the device have not yet reached this level
However, the half-maximum width of its luminescence spectrum is greater than 100nm, so its chromaticity cannot be said to be complete.

Method used

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  • Novel red color emitting compounds and organic electroluminescent device using them
  • Novel red color emitting compounds and organic electroluminescent device using them
  • Novel red color emitting compounds and organic electroluminescent device using them

Examples

Experimental program
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Effect test

Embodiment approach

[0058] Each definition in the above formula will be explained in detail below.

[0059] According to the present invention, "C 1-6 "Alkyl" refers to a straight chain or branched saturated hydrocarbon group with 1-6 carbon atoms, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, Isopentyl, hexyl, isohexyl, etc. are preferably methyl or ethyl, more preferably methyl.

[0060] Similarly, "C 1-6 "Alkoxy" refers to a straight-chain or branched-chain alkyl group containing 1 to 6 carbon atoms, such as methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy tert-butoxy, pentyloxy, isopentyloxy, hexyloxy, etc., preferably methoxy or ethoxy.

[0061] When "replaces", no matter the replaced C 1-6 Alkyl, or substituted C 1-6 Alkoxy, substituents can be selected from hydroxyl and halogen.

[0062] Representative examples of compounds of formula (I) will be described below. However, the present invention should not be limited by these representative exam...

Embodiment

[0089] In this example, Alq3 is used as the host of the red light-emitting layer, and compound 1 prepared by the above-mentioned method is used as its dopant to manufacture an organic EL device.

[0090] First, CuPC was vacuum-deposited on ITO-deposited glass washed by microwaves to form a hole injection layer with a thickness of 30 nm. NPD (N, N'-dinaphthyl-N, N'-phenyl-(1,1'-diphenyl)-4,4'-diamine) was deposited on the hole injection layer to form a thickness of A hole transport layer of 50 nm, and then Alq3 (host) doped with 2.0% compound 1 (dopant) was deposited on the hole transport layer to form a light emitting layer with a thickness of 30 nm. An electron transport layer (Alq3; 40nm), an electron injection layer (Li 2 O; 25nm) and a cathode (Mg / Ag; 100nm), thereby obtaining an organic EL device.

[0091] A forward bias DC voltage was applied to the organic EL device manufactured in this example, and its light emitting performance was evaluated. The glow color is red....

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Abstract

The present invention relates to a novel red color emitting compound of formula (I), an organic electroluminescent device using the compound, and a method for manufacturing the device. The present invention also relates to a red organic electroluminescent emitting device having high chromaticity and high brightness by using the compounds of the following formula (I) having high luminescence efficiency; wherein R 1 is independently selected from the group consisting of hydrogen atom and substituted or unsubstituted C 1-6 alkyl; X represents N, S, or O; and Y represents hydrogen atom, substituted or unsubstituted C 1-6 alkyl, or substituted or unsubstituted C 1-6 alkoxy.

Description

field of invention [0001] The present invention relates to novel red light-emitting compounds, in particular to red light-emitting compounds of the following formula (I) with good color purity and high luminous efficiency: [0002] [0003] in, [0004] R 1 independently selected from a hydrogen atom and a substituted or unsubstituted C 1-6 alkyl; [0005] X represents N, S or O; and [0006] Y represents a hydrogen atom, substituted or unsubstituted C 1-6 Alkyl, or substituted or unsubstituted C 1-6 alkoxy. [0007] The present invention also relates to an organic electroluminescent device comprising said red-emitting compound, in particular to an organic electroluminescent device having one or more thin organic layers comprising at least one electrode formed on the first electrode (anode) and the light-emitting region between the second electrode (cathode), wherein at least one of the organic thin layers contains one or more compounds represented by the above formu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06H05B33/14
CPCH01L51/5012H01L51/0061C09K11/06H01L51/0073H01L51/0071H01L51/0065H01L51/0064H10K85/652H10K85/653H10K85/636H10K85/657H10K85/6574H10K50/11Y10S428/917
Inventor 金麒东
Owner LG DISPLAY CO LTD