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Organic electroluminescent diode device

An electroluminescent layer, electroluminescent technology, applied in the direction of electric solid devices, electrical components, semiconductor devices, etc., can solve the problem of ITO film morphology, carrier transport and injection performance is difficult to control, the proportion of element indium is not suitable for control, and there are The performance of electroluminescent devices is unstable, and the effect of excellent carrier transport and injection performance and high light transmittance can be achieved.

Inactive Publication Date: 2010-09-08
苏旋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, ITO as an anode has many insurmountable deficiencies in the application of organic electroluminescent devices: first, in the process of preparing ITO thin films, the proportion composition of elements indium (In) and tin (Sn) is not suitable for control, so ITO thin films It is difficult to control the morphology, carrier transport and injection properties of organic electroluminescent devices, which makes the performance of organic electroluminescent devices unstable
This scheme fails to completely replace the ITO anode in organic electroluminescent devices

Method used

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  • Organic electroluminescent diode device

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Embodiment 1

[0033] see figure 2 , the organic electroluminescent device has three structural layers: an anode 23 , an organic electroluminescent layer 22 and a cathode 21 ; their structural relationship is that the organic electroluminescent layer 22 is between the anode 23 and the cathode 21 . The anode 23 of the device is composed of two parts: a metal aluminum layer 23b and an aluminum oxide layer 23a, wherein the aluminum oxide layer 23a is between the metal aluminum layer 23b and the organic electroluminescent layer 22 . The thickness of the metal aluminum layer 23b is selected between 0.1nm and 200nm; the thickness of the aluminum oxide layer 23a formed on the metal aluminum layer 23b is between 0.1nm and 5nm. The organic electroluminescent layer 22 is formed on the aluminum oxide layer 23 a, and the cathode 21 is formed on the organic electroluminescent layer 22 . The anode and cathode of the organic electroluminescent device are connected to a power supply through an external ci...

Embodiment 2

[0036] see image 3 , the organic electroluminescent device has three structural layers: an anode 33 , an organic electroluminescent layer 32 and a cathode 31 ; their structural relationship is that the organic electroluminescent layer 32 is between the anode 33 and the cathode 31 . The anode 33 of this device is made up of three parts: multilayer metal oxide layer 33a, aluminum oxide layer 33b and metal Al layer 33c; Their position relation is: aluminum oxide layer 33b is in multilayer metal oxide layer 33a and metal Al layer Between 33c. The organic electroluminescent layer 32 is sequentially formed on the multi-layer metal oxide layer 33 a, and the cathode 31 is formed on the organic electroluminescent layer 32 . The number of metal oxide layers 33a is between 1 and 10 layers, and the total thickness is between 0.1 nm and 1000 nm. The thickness of the aluminum oxide layer 33b is between 0.1nm and 5nm. The total thickness of the metal aluminum layer 33c is between 0.1nm a...

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Abstract

The invention relates to an organic electroluminescent diode device, which comprises an anode, a cathode and an organic electroluminescent layer arranged between the anode and the cathode. The organic electroluminescent diode device is characterized in that the cathode is a bi-layer structure consisting of a metal aluminium layer and an aluminium oxide layer, the aluminium oxide layer is formed on the metal aluminium layer; the organic electroluminescent layer is formed on the aluminium oxide layer; and the cathode is formed on the organic electroluminescent layer. The invention adopts a technical proposal of replacing ITO (indium tin oxide) with the low-cost and simple-structured anode. By using a bi-layer or multilayer structure of the low-cost metal aluminium and metal oxide, such as aluminium oxide, as the anode, the problem that the elemental composition (ratio of elements In, Sn and O) is difficult to control during the process of the formation of ITO thin film is avoided; and the high light transmittance and the good carrier transport and injection performance are kept; the anode provided in the technical proposal can replace the ITO anode in the industrial application.

Description

technical field [0001] The invention relates to a photoelectric device, specifically an organic electroluminescent diode device. technical background [0002] The basic structure of an organic electroluminescent device is an anode, a cathode, and an organic light-emitting layer placed between the anode and the cathode; holes are injected into the organic light-emitting layer through the anode, electrons are injected into the organic light-emitting layer from the cathode, and the organic light-emitting layer is excited. The luminescent substance produces light emission. Organic electroluminescent devices are currently used in flat panel displays and lighting. For the application of flat panel displays, organic electroluminescent technology has many advantages such as light and thin, simple structure, simple manufacturing process, low power consumption, and excellent color expression; for lighting applications, organic electroluminescent technology has low power consumption. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/54
Inventor 苏旋
Owner 苏旋
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