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An organic electroluminescent device containing carbazole as a core compound and its application

An electroluminescent device and organic compound technology, applied in the field of organic electroluminescent devices, can solve the problems of reduced device angle dependence, low light extraction efficiency, etc., and achieve good industrialization prospects, high light extraction efficiency, and high yield. Effect

Active Publication Date: 2022-06-03
JIANGSU SUNERA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, in view of the current low light extraction efficiency of OLED devices, it is desirable to use a cover layer (light extraction material layer) that can achieve higher light extraction efficiency in the device structure, and to reduce the angular dependence of the device.

Method used

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  • An organic electroluminescent device containing carbazole as a core compound and its application
  • An organic electroluminescent device containing carbazole as a core compound and its application
  • An organic electroluminescent device containing carbazole as a core compound and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Example 1: Synthesis of Compound 8:

[0068]

[0069] Under nitrogen atmosphere, 0.01mol of raw material I-1, 0.025mol of raw material II-1, 0.03mol of sodium tert-butoxide, 5×10 -5 mol Pd 2 (dba) 3 and 5×10 -5 mol tri-tert-butylphosphorus, then add 150 ml of toluene to dissolve it, heat to 100° C., reflux for 24 hours, and observe the reaction by TLC until the reaction is complete. Cool to room temperature naturally, filter, and spin the filtrate until there is no fraction. The resulting material was purified by silica gel column (petroleum ether as eluent) to give Intermediate A-1.

[0070] In a 250ml three-necked flask, under the protection of nitrogen, add 0.01mol of intermediate A-1, 0.015mol of raw material III-1, 150ml of toluene, stir and mix, and then add 5×10 -5 mol Pd 2 (dba) 3 , 5×10-5mol P(t-Bu) 3 , heated to 110°C, refluxed for 24 hours, and observed the reaction by TLC until the reaction was complete. Naturally cooled to room temperature, filt...

Embodiment 2

[0127] Transparent substrate layer 1 / anode layer 2 (ITO(15nm) / Ag(150nm) / ITO(15nm)) / hole injection layer 3(HT-1:P-1=97:3 mass ratio, thickness 10nm) / empty Hole transport layer 4 (HT-1, thickness 130nm) / electron blocking layer 5 (EB-2, thickness 40nm) / light emitting layer 6 (GH-1:GH-2:GD-1=47:47:6 mass ratio, Thickness 40nm) / hole blocking / electron transport layer 7 (ET-1: Liq=1:1 mass ratio, thickness 35nm) / electron injection layer 8 (Yb, thickness 1nm) / cathode layer 9 (Mg:Ag=1: 9 mass ratio, thickness 15 nm) / CPL layer 10 (compound 8 of the present invention, thickness 70 nm).

Embodiment 3

[0129] Transparent substrate layer 1 / anode layer 2 (ITO(15nm) / Ag(150nm) / ITO(15nm)) / hole injection layer 3(HT-1:P-1=97:3 mass ratio, thickness 10nm) / empty Hole transport layer 4 (HT-1, thickness 130nm) / electron blocking layer 5 (EB-3, thickness 90nm) / light emitting layer 6 (RH-1:RD-1=97:3 mass ratio, thickness 40nm) / hole Blocking / electron transport layer 7 (ET-1: Liq=1:1 mass ratio, thickness 35nm) / electron injection layer 8 (Yb, thickness 1nm) / cathode layer 9 (Mg:Ag=1:9 mass ratio, thickness 15nm ) / CPL layer 10 (compound 8 of the present invention, thickness 70 nm).

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Abstract

The invention relates to an organic electroluminescence device containing carbazole as a core compound and its application. The device comprises: a substrate layer; a first electrode on the substrate; an organic light-emitting functional layer with an organic light-emitting function a layer on the first electrode; a second electrode, the second electrode is on the organic light-emitting functional layer; and a covering layer, the covering layer is on the second electrode, the covering layer includes an organic compound, The organic compound of the covering layer is an organic compound with carbazole as the core connected with aromatic amine groups. Such compounds have high glass transition temperature and thermal stability. The evaporation temperature of the material is low, and its decomposition temperature is higher than the evaporation temperature; it has a low extinction coefficient and a high refractive index in the visible light field. After being applied to OLED as a covering layer, it can effectively improve the light extraction efficiency of the device. The organic electroluminescent device containing the cover layer of the present invention can be used for display or lighting equipment.

Description

technical field [0001] The present invention relates to an organic electroluminescence device, in particular to an organic electroluminescence device containing a capping layer (CPL). Background technique [0002] At present, OLED display technology has been applied in smart phones, tablet computers and other fields, and will be further expanded to large-scale application fields such as TVs. Due to the huge gap between the external quantum efficiency and the internal quantum efficiency of OLEDs, the development of OLEDs is greatly restricted. Therefore, how to improve the light extraction efficiency of OLEDs has become a research hotspot. Total reflection occurs at the interface between the ITO film and the glass substrate and the interface between the glass substrate and the air. The light emitted to the external space of the OLED device accounts for about 20% of the total amount of the organic material film EL, and the remaining about 80% of the light is mainly Guided wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D209/86C07D403/14C07D401/14C07D409/12C07D405/14C07D401/12C07D519/00C07D409/14C07D413/14C07D417/14C07D471/04C09K11/06H01L51/50H01L51/54
CPCC07D209/86C07D403/14C07D401/14C07D409/12C07D405/14C07D401/12C07D519/00C07D409/14C07D413/14C07D417/14C07D471/04C09K11/06C09K2211/1007C09K2211/1011C09K2211/1014C09K2211/1022C09K2211/1029C09K2211/1033C09K2211/1037C09K2211/1044C09K2211/1088C09K2211/1092H10K85/615H10K85/626H10K85/631H10K85/636H10K85/633H10K85/654H10K85/657H10K85/6572H10K85/6574H10K85/6576H10K30/865H10K50/85
Inventor 庞羽佳唐丹丹叶中华张兆超
Owner JIANGSU SUNERA TECH CO LTD