Aromatic ring compound, display panel and display device

A display panel and compound technology, applied in organic chemistry, electrical solid devices, semiconductor devices, etc., can solve the problems of inability to achieve close packing between molecules, high refractive index, low glass transition temperature, etc., and achieve the conjugate length Short, improved luminous efficiency, high refractive index effect
CN109705148AActive Publication Date: 2019-05-03WUHAN TIANMA MICRO ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WUHAN TIANMA MICRO ELECTRONICS CO LTD
Publication Date
2019-05-03

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Abstract

The invention belongs to the technical field of organic electroluminescence, and provides an aromatic ring compound, wherein the aromatic ring compound has a structure represented by a chemical formula i; wherein m is 0, 1 or 2; X1-X6 are each independently selected from N atoms or C atoms, and 1 to 3 of the X1-X6 are nitrogen atoms; and Ar1-Ar4 are each independently selected from substituted orunsubstituted C6-C60 aromatic rings, C8-C60 fused aromatic rings, C4-C60 heteroaromatic rings, and C8-C60 fused heteroaromatic rings. When the compound is used as a CPL (cap layer) of an organic light-emitting device (such as an OLED), the light extraction efficiency and light emission efficiency of a top emission organic light-emitting display device can be improved (especially the most effectivefor blue light pixels), and the angular dependence of light emission of the OLED device can be alleviated (the most effective for red / green pixels). At the same time, the CPL can effectively block water and oxygen in the external environment and protect an OLED display panel from being corroded by water and oxygen.
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Description

technical field

[0001] The present invention relates to the technical field of organic electroluminescent materials, in particular to an aromatic ring compound, a display panel and a display device containing the aromatic ring compound. Background technique

[0002] After decades of development, OLED has come a long way. Although the internal quantum efficiency of OLED is close to 100%, the external quantum efficiency is only about 20%. Most of the light emitted by OLEDs is confined inside the light-emitting device due to factors such as substrate mode loss, surface plasmon loss, and waveguide effect, resulting in a large amount of energy loss.

[0003] In the top-emitting device, an organic covering layer (capping layer, CPL) is evaporated on the translucent metal aluminum electrode to adjust the optical interference distance, suppress the reflection of external light, and suppress the extinction caused by the movement of surface plasmons. , thereby improving the extracti...

Claims

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