An organic electroluminescent device containing a covering layer and its application

An electroluminescent device and electroluminescent technology, applied in circuits, electrical components, electro-solid devices, etc., can solve the problems of low light extraction efficiency and reduce device angle dependence, and achieve high light extraction efficiency, good application effect and industrial Chemical prospect, good device effect

Active Publication Date: 2021-07-13
JIANGSU SUNERA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 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 a covering layer and its application
  • An organic electroluminescent device containing a covering layer and its application
  • An organic electroluminescent device containing a covering layer and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0135] Prepare an organic electroluminescent device with the following preparation steps, comprising:

[0136] On the low-temperature polysilicon (LTPS) substrate (substrate layer 100), a 10nm ITO film (first electrode layer 200) was formed by sputtering, etched into required patterns, and ultrasonically cleaned with deionized water, acetone, and ethanol, respectively. 15 minutes, and then processed in a plasma cleaner for 2 minutes; here the ITO electrode layer is an anode, and on the ITO anode layer, the hole injection layer material HAT-CN is evaporated by vacuum evaporation, and the thickness is 10nm. As the hole injection layer 310; on the hole injection layer 310, the hole transport material NPB is evaporated by vacuum evaporation, with a thickness of 110nm, and this layer is the hole transport layer 320, which can also be used as a microcavity adjustment layer; On the hole transport layer 320, the electron blocking material TCTA is evaporated by vacuum evaporation with ...

Embodiment 2

[0138] The preparation method is the same as device embodiment 1, but adopts the following device structure:

[0139] ITO(10nm) / NPB:Compound A(97:3 mass ratio, 97 mass% NPB)(10nm) / NPB(150nm) / TCTA(10nm) / CBP:Ir(PPy) 3 (90:10 mass ratio, 90 mass% of CBP) (40nm) / / TPBI (35nm) / compound D (1nm) / Yb (1nm) / Mg:Ag (10:90 mass ratio, 10 mass% of Mg) (14 nm) / Compound 1 of the present invention (50 nm).

Embodiment 3

[0141] The preparation method is the same as device embodiment 1, but adopts the following device structure:

[0142] ITO (10nm) / NPB: Compound C (95:5 mass ratio, 95% by mass of NPB) (10nm) / NPB (190nm) / TCTA (10nm) / CBP:Ir(pq)2acac (96:4 mass ratio, 96% by mass of CBP) (40nm) / TPBI (35nm) / compound D (1nm) / Yb (1nm) / Mg:Ag (10:90 mass ratio, 10% by mass of Mg) (14nm) / Compound 1 of the present invention (50nm).

[0143] Device Embodiments 4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37, 40, 43, 46, 49, 52, 55, 58, 61, 64, 67, 70, 73 , 76, 79, 82, 85, 88, 91, 94, 97, 100, 103, 106, 109, 112, 115, 118, 121, 124, 127:

[0144] The preparation method is the same as that of Device Example 1, except that compounds 6, 14, 24, 37, 42, 52, 60, 81, 91, 102, 114, 127, 137, 147, 156, 162, 174, 183,193,206,219,228,246,255,270,275,289,300,311,316,328,340,351,360,370,387,397,404,416,426,436,440 as Cover layer materials for organic electroluminescent devices.

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Abstract

The invention relates to an organic electroluminescence device with a covering layer, which comprises: a substrate layer; a first electrode on the substrate; an organic light-emitting function layer, the organic light-emitting function layer a layer on the first electrode; a second electrode on the organic light-emitting functional layer; and a cover layer on the second electrode, wherein the cover layer Including organic compounds, the organic compounds of the covering layer contain different types of heteroarylamine structures, have high glass transition temperature and molecular thermal stability; low absorption and high refractive index in the field of visible light, and are used in OLED devices After the CPL layer, the light extraction efficiency of the OLED device can be effectively improved; the present invention also relates to the use of the organic electroluminescent device containing the covering layer of the present invention for display or lighting equipment.

Description

technical field [0001] The present invention relates to an organic electroluminescent device, in particular to an organic electroluminescent device which contains a capping layer and can effectively improve light extraction efficiency. Background technique [0002] Organic electroluminescent (OLED: Organic Light Emission Diodes) device technology can be used not only to manufacture new display products, but also to prepare new lighting products. It is expected to replace the existing liquid crystal display and fluorescent lighting, and has a wide application prospect. The OLED device has a sandwich structure, including electrode layers and organic light-emitting functional layers sandwiched between different electrode layers. Various electrode layers, organic light-emitting functional layers, and other related material layers are stacked together according to the application. OLED devices. The OLED device is a current-driven device. When a voltage is applied to the electrod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/52H01L51/54
Inventor 陈海峰张兆超李崇唐丹丹
Owner JIANGSU SUNERA TECH CO LTD
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