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Organic light emitting display device

A light-emitting display device, organic technology, applied in semiconductor devices, electric solid-state devices, semiconductor/solid-state device manufacturing, etc., can solve problems such as performance degradation

Inactive Publication Date: 2017-07-25
AAC TECH PTE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At high current density, the concentration between T1 excitons is very high, and triplet-tripelt annihilation (TTA) or triplet-polaron annihilation (TPA) will occur between excitons. As a result, the performance of OLEDs plummets

Method used

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  • Organic light emitting display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] see figure 1 , is a schematic structural view of Embodiments 1-4 of the organic light-emitting display device provided by the present invention. The organic light emitting display device 100 includes a first conductive layer 11, a hole transport portion 12, a light emitting layer 13, an electron transport portion 14, and a second conductive layer 15 deposited sequentially; the light emitting layer 13 includes a fluorescent light emitting layer 131, The metal-assisted delayed fluorescence emitting layer 132 and the exciton blocking layer 133 formed between the fluorescent emitting layer 131 and the metal-assisted delayed fluorescent emitting layer 132 .

[0080]The first conductive layer 11 is an anode, and its material is ITO, IGZO, IZO, graphene, nano-silver wire, carbon nanotube and other materials; preferably ITO. The second conductive layer 15 is a cathode, and its material is a low work function metal or metal alloy, such as Al, Mg:Ag alloy or Ag, preferably Al. ...

Embodiment 2/ comparative Embodiment 2

[0142] The structure of Example 2 is: ITO / NPB / TCTA / polyfluorene: coumarin C7S (2wt%, 10nm) / 26DCzPPy (10nm) / 26DCzPPy:PdN3N (6wt%, 10nm) / TPBi / LiF / Al;

Embodiment 2

[0143] Comparative example 2 structure is:

[0144] ITO / NPB / TCTA / 2D6CzPPy:PdN3N(6wt%, 30nm) / TPBi / LiF / Al.

[0145] In the structure of embodiment 2, polyfluorene: coumarin C7S (2wt%, 10nm) represents the fluorescent light-emitting layer 131, wherein coumarin C7S is the light-emitting material of the shown fluorescent light-emitting layer 131, which is a kind of green fluorescent material; 26DCzPPy( 10nm) represents the exciton blocking layer 133; 26DCzPPy:PdN3N (6wt%, 10nm) represents the metal-assisted delayed fluorescence emitting layer 132, wherein 26DCzPPy is the delayed emission host material of the metal-assisted delayed fluorescence emitting layer 132, and PdN3N is the metal A light-emitting material (guest material) that assists the delayed fluorescence light-emitting layer 132 .

[0146] Comparative Example 2 is a common MADF light-emitting device, wherein 2D6CzPPy:PdN3N (6wt%, 30nm) represents the material of the light-emitting layer.

[0147] Please refer to Figu...

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Abstract

The invention discloses an organic light emitting display device. The organic light emitting display device comprises a first conductive layer, a second conductive layer, a cavity transmission portion formed between the first conductive layer and the second conductive layer, and a light emitting layer formed between the cavity transmission portion and an electron transmission portion, wherein the light emitting layer comprises a fluorescence light emitting layer, an auxiliary delayed fluorescence light emitting metal layer and an exciton barrier layer formed between the fluorescence light emitting layer and the auxiliary delayed fluorescence light emitting metal layer. The organic light emitting display device is advantaged in that a MADF exciton utilization rate can be improved, and efficiency roll-off can be reduced.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of light emitting diodes, in particular to an organic light emitting display device. [0003] 【Background technique】 [0004] An organic light-emitting diode (Organic Light-Emitting Diode, OLED) device can be used as a light source for a display device and an illumination device, and has the advantages of wide viewing angle, short response time, thinness and arbitrary bending. The light-emitting mechanism of OLED is that when a bias voltage is applied to the OLED device, holes are injected from the anode, transition to the EML via HIL / HTL, electrons are injected from the cathode, and enter the EML via EIL / ETL. The recombination on the material forms unstable excitons, and the process of de-exciting through FET energy transfer to the guest. [0005] In the development of OLED materials, there are four kinds of OLED mechanisms: a) fluorescence; b) phosphorescence; c) TADF thermally delayed fluorescenc...

Claims

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Application Information

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IPC IPC(8): H01L51/50
CPCH10K50/121H10K50/15
Inventor 谢再锋
Owner AAC TECH PTE LTD
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