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Flexible organic light emitting diode

A light-emitting diode, organic technology, applied in the manufacturing of electrical components, electric solid-state devices, semiconductor/solid-state devices, etc., can solve the problems of flexibility limitation, light-emitting color coordinate shift, unfavorable device large area, etc., to solve the square resistance Large and weak microcavity effects, avoiding the effect of strong microcavity effects in devices

Active Publication Date: 2013-03-27
常州第六元素半导体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional ITO and other materials are not suitable for flexible devices based on plastic substrates due to their inherent brittleness and the need for high-temperature annealing.
However, flexible substrates based on flexible glass or ultra-thin metals either have limited flexibility (cannot be bent with large curvature or multiple bends), or can only make top-emitting devices in the process of making organic light-emitting devices (because metal is opaque ), which limits its application range, the future flexible light-emitting devices must be based on plastic substrates
[0005] At present, graphene electrodes have become an important option for flexible plastic conductive electrodes. However, one of the important reasons why graphene electrodes cannot be effectively applied to OLED devices is that their surface resistance is large, which is not conducive to large-scale devices and device efficiency. , even after doping, it is difficult to achieve a similar effect to ITO
In addition, another option for conductive electrodes in the development of flexible OLED devices is ultra-thin metal films (about ten nanometers), which can achieve good conductivity and low square resistance characteristics, and are highly bendable. However, due to the use of metal film anodes The serious microcavity effect will be produced in the process of making OLED, which will cause the luminous color coordinates to shift greatly with different viewing angles, which is unacceptable for flexible devices that need to be bent, thus limiting the development of this anode

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0072] A flexible organic light emitting diode device includes: a flexible substrate 1, a graphene composite anode 2, a hole injection layer 3, an organic functional layer 4, an electron injection layer 5, and a cathode 6. figure 1 It is a cross-sectional structure diagram of a flexible organic light-emitting diode single-pixel device based on a graphene composite anode.

[0073] The manufacturing process of the flexible organic light emitting diode mainly includes the following steps:

[0074] (1) Clean the flexible substrate;

[0075] (2) Fabricate and pattern a graphene composite anode on the substrate;

[0076] (3) Depositing the hole injection layer material on the composite anode;

[0077] (4) Depositing an organic functional layer on the hole injection layer;

[0078] (5) Depositing an electron injection layer on the organic functional layer;

[0079] (6) Depositing the cathode on the electron injection layer;

[0080] (7) Perform flexible packaging on the device. ...

Embodiment 2

[0089] On the basis of the structure of the flexible organic light-emitting diode provided in Example 1, an internal light extraction layer 9 is added. The extraction layer can be made of materials such as tantalum oxide, molybdenum oxide, tungsten oxide, and vanadium oxide. deposited on flexible substrates. figure 2 It is a schematic cross-sectional structure diagram of the flexible organic light emitting diode device described in Example 2, and its specific implementation method is as follows:

[0090] (1) Clean the flexible substrate;

[0091] (2) Depositing an internal light extraction layer on a flexible substrate;

[0092] (3) Fabricate and pattern the graphene composite anode on the inner light extraction layer;

[0093] (4) Depositing the hole injection layer material on the composite anode;

[0094] (5) Depositing an organic functional layer on the hole injection layer;

[0095] (6) Depositing an electron injection layer on the organic functional layer;

[0096] (...

Embodiment 3

[0100] image 3 A cross-sectional structure diagram of an organic light-emitting diode display device integrating a single-chip capacitive touch screen for a flexible substrate. This device structure enables good touch performance to be achieved after the flexible light-emitting device is fabricated. The electrode can be made of materials such as graphene, carbon nanotubes, metal nanowires, conductive polymers, etc., and its processing method can be yellow light process or laser etching. The method of laser etching is preferred. The specific The implementation process is as follows:

[0101] (1) Clean the flexible substrate;

[0102] (2) Fabricate the touch sensing layer on the substrate;

[0103] (3) Depositing an internal light extraction layer on the touch sensing layer;

[0104] (4) Fabricate and pattern the graphene composite anode on the inner light extraction layer;

[0105] (5) Depositing the hole injection layer material on the composite anode;

[0106] (6) Depos...

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Abstract

The invention relates to a flexible organic light emitting diode device based on a graphene composite anode. The flexible organic light emitting diode device comprises a flexible substrate (1), an anode (2), a hole injection layer (3), an organic functional layer (4), an electron injection layer (5) and a cathode (6), wherein the anode (2) is the graphene composite anode and comprises a graphene thin film and a metal coating. According to the flexible organic light emitting diode device, the anode of the graphene thin film is improved, so that the organic light emitting diode anode with excellent transmittance and sheet resistance can be obtained, and the flexible organic light emitting diode device is good in bendability and weak in microcavity effect. By means of the flexible organic light emitting diode device, the problem that the organic light emitting diode device is difficult to manufacture due to high sheet resistance of the graphene anode is solved, the improvement of performances of the flexible organic light emitting diode device is facilitated, and the application of the graphene anode to the organic light emitting devices is accelerated.

Description

technical field [0001] The invention relates to the field of light-emitting diodes, in particular, the invention relates to a flexible organic light-emitting diode device based on a graphene composite anode. Background technique [0002] Since Dr. Deng Qingyun published an epoch-making paper on Organic light-emitting diode (OLED) devices in 1987 (Organic electroluminescent diodes, Tang, C.W.; Van Slyke, S.A., Applied Physics Letters (1987), 51(12 ),913-15.) After that, the research on organic light-emitting diode devices began to develop rapidly. Organic light-emitting diode display devices are all-solid-state devices with the advantages of thin thickness, high brightness, saturated colors, wide viewing angles, high contrast, and low power consumption. They can be used for color flat panel displays. Moreover, OLED is easy to realize flexible display, which makes it have unique advantages in competition with other display technologies, and is known as the next-generation dis...

Claims

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Application Information

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IPC IPC(8): H01L51/52H01L51/54H01L51/56
Inventor 谭化兵王振中
Owner 常州第六元素半导体有限公司
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