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Light emitting microcapsule, method of preparing the same and OLED display device comprising the same

a technology of light-emitting microcapsules and display devices, which is applied in the field of display technology, can solve the problems of reducing the lightness of a phosphorescent oled, the phosphorescent material is more easily to suffer from a loss, so as to reduce the quenching probability of phosphorescent material, avoid phosphorescence losses, and the amount of phosphorescent material within

Inactive Publication Date: 2015-12-17
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a light emitting microcapsule that has improved lightness and a longer life. The microcapsule contains a phosphorescent material that is isolated from molecules that can quench its light and is protected from moisture and oxygen. This reduces the likelihood of the phosphorescence material losing its effectiveness and ensures a longer lifespan for the microcapsule and its OLED display device.

Problems solved by technology

However, the phosphorescent material tends to experience self-quenching for the triplet state of molecular excitation.
Especially in the case of high current density, the phosphorescence material is more easily to suffer from a loss as a result of the self-quenching, thereby reducing the lightness of a phosphorescent OLED.
In addition, although the research and development techniques of the phosphorescent OLED devices has been relatively mature at a laboratory level, but there still exists some problems in practical, for example, the life of a phosphorescent OLED device is susceptible to the environment.
It is well known that the phosphorescent OLED device is extremely susceptible to moisture and oxygen, especially the moisture.
If the moisture permeates into the device, a dark spot in the light-emitting region, which will expand over time, is easily caused, thereby affecting the display quality and the life of the device.
However, for these prior art, there are disadvantages such as surface irregularities (such as in the case of metal cover plate encapsulation) and occurrence of microcracks (such as in the case of glass cover plate encapsulation), as well as high-costs and the complicated production process (such as in the case of Barix thin film encapsulation).

Method used

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  • Light emitting microcapsule, method of preparing the same and OLED display device comprising the same
  • Light emitting microcapsule, method of preparing the same and OLED display device comprising the same
  • Light emitting microcapsule, method of preparing the same and OLED display device comprising the same

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Embodiment Construction

[0021]Embodiments of the present invention will be described in detail with reference to the accompanying figures, so that a person skilled in the art can get a better understanding of the technical solutions of the invention.

Preparation of Microcapsules

[0022]As shown in FIG. 1, this embodiment provides a microcapsule 1 comprising a wall material and a core material, wherein the core material is phosphorescent material 2 and the wall material is a wall material capable of encapsulating the phosphorescent material.

[0023]Said phosphorescent material 2 can be a complex of iridium, such as a green phosphorescent material of Ir(ppy)3, a blue phosphorescent material of FCNIr, a red phosphorescent material of Ir(pq)2acac and the like, with the molecular structures shown below:

[0024]It should be understood that any of the phosphorescent materials in the prior art can be used as a core material of the microcapsules.

[0025]Preferably, the phosphorescent material 2 has a particle size in a rang...

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Abstract

The present invention, which belongs to the technical field of display technology, provides a microcapsule, a method of preparing the same, and an OLED (organic light emitting diode) display device comprising the same. The OLED display device comprises a microcapsule having a phosphorescent material as a core material, which reduces the probability of the phosphorescence self-quenching and is isolated from water and oxygen, thereby improving the display quality and extending the service life of the OLED display device. Therefore, the OLED display device can solve the problem that the phosphorescence OLED display device in the prior art has a low brightness and short service life.

Description

FIELD OF THE INVENTION[0001]The present invention relates to the technical field of display technology. More particularly, the present invention relates to a light emitting microcapsule, a method of preparing the same, and an OLED (organic light emitting diode) display device comprising the same.BACKGROUND OF THE INVENTION[0002]The research of OLED devices has been developed comprehensively and thoroughly since the light emitting phenomena of organic molecules was discovered by Professor Qingyun Deng. OLED devices have been widely applied in the field of display technology because these devices have advantages of high efficiency, low power consumption, wide color gamut and the like. Based on the light emitting material, OLED can be substantially classified into two kinds, one comprising fluorescent material and the other comprising phosphorescent material. More attention has been paid to the phosphorescent material due to its high internal quantum efficiency.[0003]However, the phosp...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01L51/50H01L51/52H10K99/00
CPCH01L51/5024H01L51/5253H01L51/0081H01L51/0093H01L51/5016H10K85/649H10K85/656H10K85/654H10K50/11H10K71/00H10K59/873H10K85/324H10K85/342H10K2101/10H10K50/12H10K50/844H10K85/761
Inventor CHEN, CHANGDIYUK, SANGMANLUO, YIYONGYANG, TAO
Owner BOE TECH GRP CO LTD
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