Light extraction device and organic electroluminescent device applying light extraction device and preparation method

Abstract

The invention provides a light extraction device and a preparation method thereof. The light extraction device comprises a high refractive index transparent substrate and a light extraction layer which is formed on the high refractive index transparent substrate. The refractive index of the high refractive index transparent substrate is fixed so that total reflection from an organic layer to the substrate can be effectively eliminated. With changing of a light path of total reflection, light extraction rate can be enhanced by the light extraction layer so that the light extraction device is simple in structure and high in light extraction rate. The invention also provides an organic electroluminescent device containing the light extraction device and the preparation method of the light extraction device. The light extraction device is arranged between a base plate and a first electrode and capable of extracting light beams limited in an organic functional layer so that the light extraction device has high-efficient light extraction rate. Besides, after the device is packaged, channels entered by water vapor and oxygen are less so that the service life of the device is enhanced.

Description

technical field [0001] The invention relates to the field of organic electroluminescent devices, in particular to a light extraction component, an organic electroluminescent device using the same and a preparation method thereof. Background technique [0002] OLED (English full name is Organic Light Emitting Device, which means organic electroluminescent device, referred to as OLED) is a next-generation display technology, which has the advantages of wide color gamut, fast response, wide viewing angle, no pollution, high contrast, and planarization. [0003] A typical OLED device structure generally includes a glass substrate, a first electrode, a second electrode, and an organic light-emitting functional layer arranged between the two electrodes. Due to the reflection caused by the matching of the refractive index of each layer of material, the light emitted by the light-emitting layer is large. part is limited to the device. For example, the refractive index of air is app...

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Problems solved by technology

[0008] For this reason, the technical problem to be solved by the present invention is that in the prior art, the light extraction components for extracting the light beams limited in the organic light-emitting functional layer ar

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