A light extraction film having hollow bubbles and an organic light-emitting diode and a processing method thereof

A technology of light extraction film and air bubbles, which is applied in the direction of organic semiconductor devices, electrical components, electric solid devices, etc., can solve the problems of inability to output light, achieve the effect of improving coupling light output efficiency, avoiding total reflection, and improving outcoupling efficiency

Active Publication Date: 2018-08-10
武汉华美晨曦光电有限责任公司
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  • 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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  • A light extraction film having hollow bubbles and an organic light-emitting diode and a processing method thereof
  • A light extraction film having hollow bubbles and an organic light-emitting diode and a processing method thereof
  • A light extraction film having hollow bubbles and an organic light-emitting diode and a processing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Such as image 3 As shown, this example includes a glass plate on which a light extraction film is compounded. The light extraction film contains hollow bubble holes. The main material of the extraction film is TiO 2 , The film is deposited on the glass plate by a dual ion coater. In the structure in this example, the light emitted from the light-emitting layer propagates in two directions up and down, and 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 and the TiO 2 Since the multi-bubble film provided by the present invention can effectively provide astigmatism, it can be effectively extracted and transferred to ITO / TiO 2 The light of the interface. Thereby improving the overall coupling efficiency of the device. The multi-bubble film is the inner light emitting film of the OLED device, and the prepa...

Embodiment 2

[0049] Such as Figure 4 As shown, this example includes a glass plate on which a light extraction film is compounded, and the light extraction film contains hollow bubble holes. The main material of the extraction film is SiO 2 , The film is deposited on the glass plate by a dual ion coater. In the structure in this example, the downwardly transmitted light enters the glass / external extraction film interface after passing through the glass substrate. Like the main body of the glass substrate, the main material of the outer extraction film is also SiO 2 , The refractive index is matched, and the light transmitted in the glass can be well absorbed. Under the action of the gas in the film, the absorbed light is scattered and transferred to the air. In this example, the multi-bubble outer 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 film is the light-emittin...

Embodiment 3

[0055] Such as Figure 5 As shown, two layers of multi-bubble structures are prepared using the same process and the structured films are respectively applied to the inner extraction film and the outer extraction film of the device. The main material of the inner extraction membrane is TiO 2 , The main material of the outer extraction film is SiO 2 This structure can reduce the waveguide mode and the substrate mode during the light output process of the device, thereby improving the light output coupling efficiency of the device.

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Abstract

The invention discloses a light extraction film having hollow bubbles and an organic light-emitting diode and a processing method thereof. The light extraction film having hollow bubbles is prepared based on high-refractive-index materials TiO2, ZnO, SiO2, ZnGe and ZrO2 and combined with dual ion beam sputtering technology to modify a thin film; and such structure can both serve as an external extraction film of the device and an internal extraction film of the device to increase output of the light. The processing method of the light extraction film is a preparation method for preparing a multiple-bubble structure film by introducing an assistant ion source in the sputtering process and through power adjustment of the assistant ion beam and rotation adjustment of a sample bench based on ion beam sputtering IBSD technology. The provided OLED illuminating device comprises the light extraction film having the hollow bubbles, so that under the premise of not damaging device structure, waveguide/substrate mode during light emission process is reduced, and coupling light extraction efficiency of the device is improved.

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, in particular to a light extraction film containing air bubbles, an organic light emitting diode and a processing method. Background technique [0002] Recently, the development of Organic Light Emitting Diodes (OLED) has attracted widespread attention in the scientific and industrial circles. Compared with traditional LED point light sources, OLED is a surface light source. It does not require the assistance of other lamps and can be used for large-area light source lighting. At the same time, it is also flexible, environmentally friendly, light and thin, low temperature, and low power consumption. And the advantages of eye protection. In other words, the application prospect of OLED lighting is huge, and it is expected to become the mainstream of future lighting. [0003] At presen...

Claims

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Application Information

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Patent Type & Authority Applications(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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