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Light extraction film containing air bubbles, organic light emitting diode and processing method

A technology of light extraction film and air bubbles, which is applied in the directions of organic semiconductor devices, electrical components, semiconductor devices, etc., can solve the problem of inability to emit light, improve the efficiency of coupling out light, avoid total reflection, and reduce waveguide mode and substrate mode. state effect

Active Publication Date: 2020-06-16
武汉华美晨曦光电有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, using phosphorescent materials, the internal quantum efficiency of the traditional OLED device structure can be close to 100%, but the coupled light extraction efficiency is only about 20%, and about 80% of the light is confined or lost inside the device, and cannot be emitted.

Method used

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  • Light extraction film containing air bubbles, organic light emitting diode and processing method
  • Light extraction film containing air bubbles, organic light emitting diode and processing method
  • Light extraction film containing air bubbles, organic light emitting diode and processing method

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Such as image 3 As shown, this example includes a glass plate, and a light extraction film is compounded on the glass plate. The light extraction film contains hollow air holes, and the main material of the extraction film is TiO 2 , the film was deposited on a glass plate by a double ion coater. In the structure in this example, the light emitted by the light-emitting layer propagates in two directions, up and down, wherein the light propagating upward is reflected by the metal cathode and finally propagates downward. The reflected light and the downward light from the light source respectively pass through the organic layer, the ITO layer until TiO 2 layer, because the multi-bubble film provided by the present invention can effectively provide the effect of astigmatism, so it can effectively extract and transfer to ITO / TiO 2 interface light. Thereby improving the overall coupling efficiency of the device. The multi-bubble film is the inner light-emitting film of ...

Embodiment 2

[0050] Such as Figure 4 As shown, this example includes a glass plate, and the light extraction film is compounded on the glass plate. The light extraction film contains hollow air holes, and the main material of the extraction film is SiO 2 , the film was deposited on a glass plate by a double ion coater. In the structure of this example, the light transmitted downwards is incident on the glass / extraction film interface after passing through the glass substrate. Like the main body of the glass substrate, the main material of the external extraction film is also SiO 2 , the refractive index is matched, and the transmitted light in the glass can be well absorbed. Under the action of the gas in the film, the absorbed light is scattered and transmitted to the air. In this example, the multi-bubble external extraction film structure can reduce the substrate mode during the light extraction process, thereby improving the efficiency of the device as a whole. The multi-bubble fi...

Embodiment 3

[0056] Such as Figure 5 As shown, the two-layer multi-bubble structure was prepared by the same process, and the structural film was applied to the inner extraction film and the outer extraction film of the device, respectively. The main material of the inner extraction film is TiO 2 , the main material of the external extraction film is SiO 2 , the structure can reduce the waveguide mode and the substrate mode in the light extraction process of the device, thereby improving the light coupling efficiency of the device.

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Abstract

The invention discloses a light extraction film containing hollow air bubbles, an organic light-emitting diode and a processing method. With high refractive index material TiO 2 ,ZnO,SiO 2 , ZnGe and ZrO 2 Based on this method, the thin film was modified by dual ion beam sputtering technology to prepare a light extraction film containing hollow air bubbles. This structure can be used as both the external extraction film and the internal extraction film of the device. Increased export of light. The processing method of the extraction film is based on the ion beam sputtering IBSD technology. During the sputtering process, the auxiliary ion source is introduced, and the power adjustment of the auxiliary ion beam and the rotation adjustment of the sample stage are used to prepare a multi-bubble structure thin film. The light extraction film of the OLED lighting device containing hollow air bubbles provided by the present invention can reduce the waveguide / substrate mode in the light extraction process and improve the light coupling efficiency of the device without destroying the device structure.

Description

technical field [0001] The invention relates to the field of organic light-emitting diode (OLED) lighting technology, magnetron sputtering and ion beam processing technology in micro-nano processing, and in particular to a light extraction film containing hollow air bubbles, an organic light-emitting diode and a processing method. Background technique [0002] Recently, the development of organic light emitting diodes (Organic Light Emitting Diodes, OLEDs) has attracted widespread attention in the scientific research and industrial circles. Compared with the traditional LED point light source, OLED is a surface light source. It does not need the assistance of other lamps and can be applied to large-area light source lighting. At the same time, it is also bendable, environmentally friendly, light and thin, low temperature, and low power consumption. and eye protection. In other words, the application prospect of OLED lighting is huge, and it is expected to become the mainstr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/52H01L51/54H01L51/56
CPCH10K50/854H10K50/858H10K2102/00H10K71/00
Inventor 金凌刘纪文周炜王亮江创刘晓凝易子为
Owner 武汉华美晨曦光电有限责任公司
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