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An organic light-emitting device and display panel

A technology of organic light-emitting devices and light-emitting layers, applied in organic semiconductor devices, electric solid-state devices, semiconductor devices, etc., can solve the problems of high price, low luminous efficiency, and blue phosphorescent materials that have not yet been commercialized, and achieve low prices , Improve luminous efficiency, improve the effect of luminous uniformity

Active Publication Date: 2021-01-26
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The internal quantum efficiency of phosphorescent materials can theoretically reach 100%, but due to the precious metal iridium, its price is expensive, and at present, green and red phosphorescent materials have been commercialized, but blue phosphorescent materials have not yet been commercialized
The fluorescent material is a pure organic dye, and the price is relatively cheap, but its luminous efficiency is low (internal quantum efficiency only reaches 25%)

Method used

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  • An organic light-emitting device and display panel
  • An organic light-emitting device and display panel
  • An organic light-emitting device and display panel

Examples

Experimental program
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Effect test

no. 1 example

[0042] figure 1 It is a schematic structural diagram of an organic light emitting device according to the first embodiment of the present invention. From figure 1 It can be seen from the figure that the organic light emitting device of the embodiment of the present invention includes a first electrode 200 , a second electrode 1000 and a light emitting layer 600 . Wherein, the second electrode 1000 is disposed opposite to the first electrode 200 , and the light emitting layer 600 is disposed between the first electrode 200 and the second electrode 1000 . The material of the light-emitting layer 600 includes a host material, a luminescent guest and an auxiliary guest. The luminescent guest includes a fluorescent dye, and the auxiliary guest includes an organic compound with thermally activated delayed fluorescence (TADF) properties. The host material may include small molecule organic materials, such as CBP material (4,4'-bis(9-carbazole)biphenyl), mCBP material (3,3'-bis(9-ca...

no. 2 example

[0071] Figure 6 It is a schematic structural diagram of a top-emitting organic light-emitting device according to the second embodiment of the present invention. Different from the first embodiment, in this embodiment, if Figure 6 As shown, the light emitting surface is disposed on a side of the second electrode 1000 away from the first electrode 200 . The top emission organic light emitting device further includes a light extraction layer 1100, which is arranged on the side of the second electrode 1000 away from the light emitting layer 600, and the light extraction layer can increase the light extraction rate of the organic light emitting device and increase the brightness of the organic light emitting device. In a specific implementation, the material of the light extraction layer 1100 includes an organic material, an inorganic material or an organic-inorganic hybrid material with an average refractive index greater than or equal to 1.7 in the visible light range, su...

no. 3 example

[0077] Based on the inventive concepts of the foregoing embodiments, an embodiment of the present invention further provides a display panel, which includes the organic light emitting device of the foregoing embodiments, and further includes a thin film transistor for driving the organic light emitting device. The display panel can be any product or component with a display function such as a mobile phone, a tablet computer, a TV set, a monitor, a notebook computer, a digital photo frame, a navigator, and the like.

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Abstract

The invention discloses an organic light-emitting device and a display panel. The organic light-emitting device includes a first electrode, a second electrode disposed opposite to the first electrode, and a light-emitting layer disposed between the first electrode and the second electrode, and the light-emitting layer includes a host material, a light-emitting guest, and Auxiliary guest, the luminescent guest includes a fluorescent dye, and the auxiliary guest includes an organic substance with heat-activated delayed fluorescence characteristics. The auxiliary guest with TADF characteristics makes the maximum external quantum efficiency of the fluorescent light-emitting device equivalent to that of the phosphorescent light-emitting device, realizes that the luminous efficiency of the fluorescent light-emitting device is equivalent to that of the phosphorescent light-emitting device, and improves the luminous efficiency of the fluorescent light-emitting device; Phosphorescent materials and fluorescent dyes do not contain precious metals and are cheap, which greatly reduces the cost of organic light-emitting devices.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an organic light emitting device and a display panel. Background technique [0002] Organic Light Emitting Diode (OLED) is known as the next-generation display due to its advantages of self-illumination, high efficiency, bright colors, thinness, power saving, and rollability, and has attracted more and more attention in recent years. How to design organic electroluminescent devices with higher efficiency and longer lifespan has been one of the directions of efforts of researchers in this field. [0003] In the prior art, organic electroluminescent materials are mainly classified into fluorescent materials and phosphorescent materials. The internal quantum efficiency of phosphorescent materials can theoretically reach 100%. However, due to the precious metal iridium, they are expensive. At present, green and red phosphorescent materials have been commercialized, but blue phospho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/54H01L27/32
CPCH10K59/00H10K85/00H10K50/11H10K2101/40H10K50/12H10K85/654H10K85/657H10K85/6572H10K2101/80H10K2101/20H10K50/858H10K2102/351
Inventor 牟鑫
Owner BOE TECH GRP CO LTD
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