Transparent metal electrodes and their organic electroluminescent top-emitting devices

A transparent metal and luminescent technology, which is applied in the direction of electric solid-state devices, electrical components, semiconductor devices, etc., can solve the problems of poor performance of transparent top electrodes, achieve high uniformity of film formation, increase grain size, and increase electrical conductivity Effect

Inactive Publication Date: 2016-08-24
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] What the present invention is to solve is to provide a new method to effectively improve the poor performance of Al / Ag double-layer metal electrodes as transparent top electrodes of organic electroluminescent top-emitting devices.

Method used

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  • Transparent metal electrodes and their organic electroluminescent top-emitting devices
  • Transparent metal electrodes and their organic electroluminescent top-emitting devices
  • Transparent metal electrodes and their organic electroluminescent top-emitting devices

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Embodiment 1: a kind of transparent metal electrode, such as figure 1 shown. The electrodes are arranged in the following order from bottom to top: substrate, interface layer, metal layer 1, metal layer 2, and metal layer 3, wherein:

[0038] The substrate is glass with better smoothness;

[0039] The interfacial layer is LiF deposited on glass with a thickness of 1 nm;

[0040] Metal layer 1 is Al deposited on the interface layer, with a thickness of 2 nm;

[0041] The metal layer 2 is Cu deposited on the metal layer 1 with a thickness of 1 nm;

[0042] The metal layer 3 is Ag deposited on the metal layer 2 with a thickness of 20 nm.

Embodiment 2

[0043] Embodiment 2: a kind of transparent metal electrode, such as figure 1 shown. The electrodes are arranged in the following order from bottom to top: substrate, interface layer, metal layer 1, and metal layer 2, wherein:

[0044] The substrate is glass with better smoothness;

[0045] The interfacial layer is LiF deposited on glass with a thickness of 1 nm;

[0046] Metal layer 1 is Al deposited on the interface layer, with a thickness of 2 nm;

[0047] Metal layer 2 is Ag deposited on metal layer 1 with a thickness of 20 nm.

[0048] Table 1 shows the electrode parameters in Example 1 and Example 2. By comparison, it is found that the Al / Cu / Ag three-layer metal electrode has smaller sheet resistance and surface roughness than the Al / Ag double-layer metal electrode.

[0049] In addition, through the comparison of the transmittance, it is found that compared with the Al / Ag double-layer metal electrode, the transmittance of the Al / Cu / Ag three-layer metal electrode has b...

Embodiment 3

[0052] Embodiment 3: a kind of top emission organic electroluminescence device, such as Figure 4As shown, the layers of the device are arranged in the following order from bottom to top: substrate, bottom electrode, hole injection layer, hole transport layer, light emitting layer, electron transport layer, electron injection layer, top electrode and optical coupling output layer, wherein :

[0053] The substrate is coated with 500 nm SiO x Si slices;

[0054] The bottom electrode is Ag deposited on the substrate with a thickness of 100 nm;

[0055] The hole injection layer is MoO deposited on the bottom electrode 3 , with a thickness of 1.5 nm;

[0056] The hole transport layer is NPB deposited on the hole injection layer with a thickness of 60 nm;

[0057] The light-emitting layer is a doped layer Alq deposited on the hole transport layer 3 : C545T, the doping concentration is 1wt.%, and the thickness is 30nm;

[0058] The electron transport layer is Alq deposited on ...

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Abstract

A transparent metal electrode and an organic electroluminescent top-emitting device based on the electrode, the transparent metal electrode is provided with three metal layers, the second metal layer Cu is stacked between the first metal layer Al and the second metal layer between. The thickness of the first metal layer Al is set to 2nm, the thickness of the second metal layer Cu is set to 1nm, and the thickness of the third metal layer Ag is set to 20-7nm. The transparent metal electrode of the invention has the advantages of high transmittance, high conductivity and high uniformity of film formation. The organic electroluminescent top-emitting device based on the transparent metal electrode of the present invention has high efficiency.

Description

technical field [0001] The invention relates to the technical field of organic semiconductor optoelectronic devices, in particular to a transparent metal electrode and an organic electroluminescent top-emitting device based on the electrode. Background technique [0002] Organic electroluminescent devices have the advantages of low driving voltage, high luminous brightness and luminous efficiency, wide luminous viewing angle, fast response speed, ultra-thin, light weight and compatible with flexible substrates, etc., and are widely regarded as the mainstream technology for next-generation lighting and display . [0003] Among organic electroluminescent devices, a special type of device is the top-emitting device. The light of the top-emitting device is directly emitted from the top electrode, and no longer requires the bottom electrode to have high transmittance. This gets rid of the limitation of the expensive ITO (indium tin oxide) substrate, and other cheap and easy-to-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/52H01L51/54
CPCH10K50/805
Inventor 何守杰刘蓝琦王登科江楠吕正红
Owner YUNNAN UNIV
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