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Top-emitting organic electroluminescent device based on semi-transparent composite negative electrode and preparation method for top-emitting organic electroluminescent device

A compound cathode and top emission technology, which is applied in semiconductor/solid-state device manufacturing, electric solid-state devices, semiconductor devices, etc., can solve the problem that the spectrum affects the display or lighting effect of the device, so as to overcome the problem of angle dependence and improve angle stability , the effect of good angle stabilization characteristics

Inactive Publication Date: 2013-07-24
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the angular dependence of the spectrum seriously affects the effect of the device display or illumination

Method used

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  • Top-emitting organic electroluminescent device based on semi-transparent composite negative electrode and preparation method for top-emitting organic electroluminescent device
  • Top-emitting organic electroluminescent device based on semi-transparent composite negative electrode and preparation method for top-emitting organic electroluminescent device
  • Top-emitting organic electroluminescent device based on semi-transparent composite negative electrode and preparation method for top-emitting organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A blue top-emitting device with POAPF:8wt% Firpic as the light-emitting layer was prepared. The detailed preparation process is as follows:

[0035] [l] The glass substrate is ultrasonically cleaned with toluene, acetone, ethanol and deionized water in sequence, and then dried.

[0036] [2] Place the treated substrate in a multi-source organic molecular vapor deposition system. The system includes an organic evaporation area (10 evaporation sources) and a metal evaporation area (2 evaporation sources) in the same vacuum chamber. The areas and the evaporation sources are isolated from each other to avoid mutual pollution. The substrate can be rotated to the upper part of the organic evaporation area or the metal evaporation area to facilitate the growth of materials. The substrate is 25cm away from the evaporation source and can rotate and revolve to ensure the metal film and the uniformity of the organic film, the evaporation materials used are placed in different evapo...

Embodiment 2

[0049] Prepared with POAPF:8wt%Firpic(20nm) / POAPF:5wt%Ir(MDQ) 2 (acac)(10nm) is a white-light top-emitting device with a light-emitting layer. The detailed preparation process is as follows:

[0050] [l] The glass substrate is ultrasonically cleaned with toluene, acetone, ethanol and deionized water in sequence, and then dried.

[0051] [2] Place the treated substrate in a multi-source organic molecular vapor deposition system. The system includes an organic evaporation area (10 evaporation sources) and a metal evaporation area (2 evaporation sources) in the same vacuum chamber. The areas and the evaporation sources are isolated from each other to avoid mutual pollution. The substrate can be rotated to the upper part of the organic evaporation area or the metal evaporation area to facilitate the growth of materials. The substrate is 25cm away from the evaporation source and can rotate and revolve to ensure the metal film and the uniformity of the organic film, the evaporation...

Embodiment 3

[0064] Prepared with POAPF:10wt%Ir(ppy) 3 For a green top-emitting device with a light-emitting layer, the detailed preparation process is as follows:

[0065] [l] The glass substrate is ultrasonically cleaned with toluene, acetone, ethanol and deionized water in sequence, and then dried.

[0066] [2] Place the treated substrate in a multi-source organic molecular vapor deposition system. The system includes an organic evaporation area (10 evaporation sources) and a metal evaporation area (2 evaporation sources) in the same vacuum chamber. The areas and the evaporation sources are isolated from each other to avoid mutual pollution. The substrate can be rotated to the upper part of the organic evaporation area or the metal evaporation area to facilitate the growth of materials. The substrate is 25cm away from the evaporation source and can rotate and revolve to ensure the metal film and the uniformity of the organic film, the evaporation materials used are placed in different ...

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Abstract

The invention discloses a top-emitting organic electroluminescent device based on a semi-transparent composite negative electrode and a preparation method for the top-emitting organic electroluminescent device, and belongs to the technical field of organic electroluminescence. The top-emitting organic electroluminescent device consists of a substrate, a metal positive electrode, an organic functional layer, a negative electrode and a light taking-out layer, wherein the organic functional layer sequentially comprises a hole transmitting layer, an electronic barrier layer, a luminous layer and an electronic transmitting layer. The top-emitting organic electroluminescent device is characterized in that the negative electrode has a metal / semiconductor / metal composite structure; a metal material is gold or silver; and a semiconductor material is germanium. Only the material of the luminous layer is changed; under the same thickness of the organic layers, the top-emitting organic electroluminescent device which is high in performance and has four colors of red, green, blue and white can be obtained; and furthermore, the emitting spectrum of the device with the semi-transparent electrode is extremely high in angle stability.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescence, and in particular relates to a top-emitting organic electroluminescence device using a novel translucent composite cathode and a preparation method thereof. Background technique [0002] Common organic electroluminescent devices are devices grown on glass substrates with ITO as the anode. In this device, light is emitted from one side of the glass substrate, so it is called a bottom-emitting device. When this device is applied to actively drive organic electroluminescent displays, there will be a problem that the pixel drive circuit of the display device and the display light-emitting area compete with each other, and the aperture ratio of the device is limited. However, the light of the top-emitting device (TEOLED) is emitted from the side of the electrode, and the pixel drive circuit is fabricated under the light-emitting device, thereby solving the problem of competition b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/56
Inventor 谢文法刘士浩尹勇明陈兆营刘旸
Owner JILIN UNIV
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