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Multi-component host material and an organic electroluminescence device comprising the same

By using a combination of a multi-component host compound and a phosphorescent dopant in an organic electroluminescent device, the deficiencies in luminous efficiency and service life of organic electroluminescent devices in the existing technology are solved, and high efficiency and long life are achieved. organic electroluminescence effect.

Inactive Publication Date: 2016-11-23
ROHM & HAAS ELECTRONICS MATERIALS KOREA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these references fail to disclose an organic electroluminescent device using a multi-component host comprising a nitrogen-containing heteroaryl-containing biscarbazole derivative and a carbazole derivative

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 2-10

[0104] Apparatus Examples 2-10: Preparation by Co-evaporation of a First Host Compound and a Second Host Compound of the Invention OLED device

[0105] OLED devices were fabricated in the same manner as Device Example 1-1 to Device Example 1-6, except that a second hole injection layer of 3 nm was formed; a first hole transport layer of 40 nm was formed; a second hole was not formed Transport layer; doping compound D-136 is used as the dopant of the light-emitting layer at a doping amount of 15wt% by the total amount of the host and the dopant; by evaporating 2,4-bis(9, 9-dimethyl-9H-fluoren-2-yl)-6-(naphthalene-2-yl)-1,3,5-triazine and quinolate lithium form a 35nm electron transport layer; and use the Other combinations of the first host compound and the second host compound used in the host.

[0106] Device Example 3-1 to Device Example 3-3: First Host Compound and Second Host of the Invention by Co-evaporation Preparation of OLED devices from compounds

[0107] O...

example 3-4

[0108] Device Examples 3-4: Preparation of OLEDs by Co-evaporation of First and Second Host Compounds of the Invention device

[0109] OLED devices were fabricated in the same manner as in Device Example 2-1 to Device Example 2-7, except that a first hole injection layer of 10 nm was formed; a second hole transport layer of 30 nm was formed using compound HT-3; Compound D-168 was used as a dopant of the light emitting layer; and other combinations of the first host compound and the second host compound used in the host of the light emitting layer were used.

example 4-1

[0122] Device Example 4-1: Preparation of OLED by co-evaporation of the first host compound and the second host compound of the present invention device

[0123] OLED devices were fabricated in the same manner as Device Example 1-1 to Device Example 1-6, except that Compound HT-4 for the second hole transport layer was used, and the compounds listed in Table 3 below were used. A compound for the first host compound and the second host compound used in the host of the light-emitting layer.

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PUM

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Abstract

The present invention relates to various types of host materials and an organic electroluminescent device including the same wherein the organic electroluminescent device comprises at least one luminescent layer between a positive electrode and a negative electrode, and the luminescent layer incudes a phosphorescent dopant and a host which consists of various types of host compounds. In addition, at least one host compound among the host compounds is denoted by chemical formula 1. In the present invention, the organic electroluminescent device has a specific combination of the host compounds and accordingly a high luminescent efficiency and a long-term life service.

Description

technical field [0001] The present invention relates to multicomponent host materials and organic electroluminescent devices comprising said multicomponent host materials. Background technique [0002] An electroluminescent device (EL device) is a self-luminous device that is advantageous in that it provides a wider viewing angle, a greater contrast ratio, and a faster response time. Organic EL devices were originally developed by Eastman Kodak by using small aromatic diamine molecules and aluminum complexes as materials to form light emitting layers [Appl. Phys. Lett. 51, 913, 1987]. [0003] An organic EL device (OLED) is a device that changes electrical energy into light by applying power to an organic electroluminescence material, and generally has a structure including an anode, a cathode, and an organic layer between the anode and the cathode. The organic layer of an organic EL device can be composed of a hole injection layer, a hole transport layer, an electron block...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/86C07D209/88C07D401/04C07D401/10C07D401/14C07D405/14C07D409/14C07D487/04C07D495/04C07D491/04C07F15/00C09K11/06H01L27/32H01L51/54H10K99/00
CPCC07D401/14C07D405/14C07F15/0033C07D401/04C07D401/10C07D409/14C07D487/04C07D491/04C07D495/04C07D209/86C07D209/88C09K11/06C09K2211/1007C09K2211/1029C09K2211/185C09K11/025H10K85/636H10K85/654H10K85/6576H10K85/6574H10K85/342H10K85/40H10K85/6572H10K50/156H10K2101/10H10K2101/90H10K50/12H10K85/615H10K85/657H10K50/11C09K2211/1088
Owner ROHM & HAAS ELECTRONICS MATERIALS KOREA LTD