Covering layer, oled display panel comprising said covering layer and electronic equipment

A technology of display panel and cover layer, applied in the direction of circuits, electrical components, electric solid devices, etc., can solve the problem of unsatisfactory light extraction efficiency of devices, and achieve the effect of ensuring overall light extraction efficiency, good light transmittance, and reducing influence deviation.

Active Publication Date: 2018-12-18
WUHAN TIANMA MICRO ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the transmittance of the cathode and the cover layer is low, even with the cover layer, the light extraction efficiency of the device is also not ideal

Method used

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  • Covering layer, oled display panel comprising said covering layer and electronic equipment
  • Covering layer, oled display panel comprising said covering layer and electronic equipment
  • Covering layer, oled display panel comprising said covering layer and electronic equipment

Examples

Experimental program
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preparation example Construction

[0060] Exemplary as A preparation method comprising the steps of:

[0061]

[0062] When B is selected from any one of substituted or unsubstituted C5-C10 cycloalkyl, substituted or unsubstituted C6-C30 aromatic groups with at least 2 broken bonds, it can be prepared by the following method:

[0063]

Embodiment 1

[0066] figure 1 An OLED display panel S1 is provided, including the following structure from bottom to top:

[0067] Substrate 1, silver reflective electrode (100nm), ITO electrode 2 (15nm), first hole transport layer 3 (10nm), second hole transport layer 4 (110nm), light emitting layer 6 (30nm), first electron transport layer Layer 7 (30nm), second electron transport layer 8 (5nm), magnesium-silver electrode (magnesium-silver mass ratio 9:1wt) 9 (15nm) and covering layer 10, and described covering layer is passed Obtained by evaporation, the thickness of the covering layer is 70nm, and the refractive index n of the covering layer is 450～650nm >1.76, the refractive index of 450nm, 530nm, 620nm is 1.84, 1.78, 1.76 respectively;

[0068] The first hole transport layer is (P-type dopant material) material and Doping, the mixing ratio is 5:95 (mass ratio); the second hole transport layer is Material; light-emitting layer is BD :BH Materials, 5:95; the first electron t...

Embodiment 2

[0070] The difference from Example 1 is that the material of the covering layer is The thickness of the covering layer is 70nm, and the refractive index n of the covering layer 450～650nm >1.8, the refractive indices of 450nm, 530nm, and 620nm are 1.95, 1.87, and 1.82, respectively.

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Abstract

The invention relates to a cover layer arranged on the cathode of an OLED display panel, and the material of the cover layer includes an N-containing compound with the structure of formula (I). The present invention adopts small organic molecules suitable for vapor deposition as the covering layer, which has practical feasibility; the molecules of the covering layer material have a symmetrical molecular structure, which is conducive to the arrangement of molecular strands and can improve the stability of film formation. and optical properties, in addition, triamine derivatives containing carbazole benzo-conjugated structures are used. The general absorption region of the material is in the ultraviolet band, and the absorption coefficient for visible light is small; The refractive index shows a decreasing trend, the smaller the difference between the high-wave band and the low-wave band, that is, the small change in the refractive index of the R / G / B three colors, reducing the deviation of the light output efficiency of the R / G / B, on the panel practical.

Description

technical field [0001] The invention belongs to the field of organic electroluminescence materials, and relates to a capping layer, an OLED display panel including the capping layer, and electronic equipment, in particular to a combination of a capping layer material and a cathode material and its application in the field. Applications in Electromechanical Luminescent Devices. Background technique [0002] In top-emitting OLED electroluminescent devices, in order to allow light to emit from the top of the device, a fully reflective anode and a semi-transparent metal cathode are used on both sides of the organic layer. The commonly used cathode metal materials are aluminum, magnesium, silver, ytterbium and other metals or their alloys. When the emitted light passes from the organic layer to the cathode at a certain angle, due to the difference in the refractive index of the film layer, a part of the light will be totally reflected, so that only a part of the light will be us...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H01L51/52H01L51/54
CPCH10K85/111H10K50/858H10K50/844
Inventor王湘成任泓扬何为滨田牛晶华柳晨
OwnerWUHAN TIANMA MICRO ELECTRONICS CO LTD