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Organic light-emitting device containing carbazole as core compound and application of organic light-emitting device

An electroluminescent device and luminescent technology, applied in the direction of electric solid-state devices, electrical components, luminescent materials, etc., can solve the problems of low light extraction efficiency, reduce the angle dependence of the device, etc., and achieve high light extraction efficiency and excellent viewing angle , the effect of angle-dependent inhibition

Active Publication Date: 2021-02-02
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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  • Organic light-emitting device containing carbazole as core compound and application of organic light-emitting device
  • Organic light-emitting device containing carbazole as core compound and application of organic light-emitting device
  • Organic light-emitting device containing carbazole as core compound and application of organic light-emitting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Embodiment 1: the synthesis of compound 8:

[0068]

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

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

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) / hole 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) / hole 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 light-emitting device containing carbazole as a core compound and application of the organic light-emitting device. The organic light-emitting device comprises a substrate layer; a first electrode which is arranged on the substrate; an organic light emitting functional layer which is arranged on the first electrode; a second electrode which is arranged on the organic light emitting functional layer; and a covering layer which is arranged on the second electrode and comprises an organic compound, wherein the organic compound of the covering layer is an organic compound which takes carbazole as a core and is connected with an arylamine group. The compound has relatively high glass transition temperature and thermal stability. The evaporation temperature ofthe material is low, and the decomposition temperature is higher than the evaporation temperature. The material has a low extinction coefficient and a high refractive index in the field of visible light, and can effectively improve the light extraction efficiency of a device after being applied to an OLED as a covering layer. The organic light-emitting device containing the covering layer of thepresent invention can be used for a display or lighting apparatus.

Description

technical field [0001] The invention relates to an organic electroluminescent device, in particular to an organic electroluminescent device containing a covering layer (CPL). Background technique [0002] At present, OLED display technology has been applied in smart phones, tablet computers and other fields, and will further expand to large-size applications such as TVs. Due to the huge gap between the external quantum efficiency and 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 will occur at the interface between the ITO film and the glass substrate and the interface between the glass substrate and the air, and the light emitted to the outer space of the OLED device accounts for about 20% of the total EL of the organic material film, and the remaining about 80% of the light is mainly in the form of The waveguide form is...

Claims

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Application Information

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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
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