Organic light-emitting display panel, display device and preparation method thereof

An organic light-emitting panel and light-emitting display technology, which is applied in semiconductor/solid-state device manufacturing, electrical components, electric solid-state devices, etc., can solve the problems of material and device life attenuation, so as to improve life, improve utilization rate, and increase number density Effect

Inactive Publication Date: 2018-08-24
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Defects generated by bond breaking lead to material and device lifetime degradation

Method used

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  • Organic light-emitting display panel, display device and preparation method thereof
  • Organic light-emitting display panel, display device and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Using the indium tin oxide (ITO) layer on the substrate as the anode, sequentially form the hole injection layer (5-30nm), the hole transport layer (1000-1300nm), the first electron blocking layer (10-80nm), and the light-emitting layer (20~40nm), electron transport layer (20~35nm), electron injection layer (1~3nm), Mg-Ag alloy cathode.

[0041] The doping material is m-MTADATA.

Embodiment 2

[0043]Using the indium tin oxide ITO layer on the substrate as the anode, sequentially form the hole injection layer (5-30nm), the hole transport layer (1000-1300nm), the second electron blocking layer (5-70nm), the first electron blocking layer layer (5-10nm), light-emitting layer (20-40nm), electron transport layer (20-35nm), EIL (1-3nm), Mg-Ag alloy cathode.

[0044] Doping material is Ir(ppy) 3 .

[0045] The present invention improves the lifetime of the inventive device by doping or partially doping (adjacent to the EBL / EML interface) hole-type dopant material in the EBL. The reason why the lifetime can be improved is that the electron blocking layer itself is generally an electron-rich material, and generally contains an aniline structure. The recombination interface is between EBL / EML, which means that a large number of electrons will be transmitted to this interface, if the transported electrons cannot be recombined by holes in time. Then too many electrons will ha...

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Abstract

The invention provides an organic light-emitting display panel. The organic light-emitting display panel comprises a first electrode, an electron injection layer, an electron transport layer, a light-emitting layer, a hole transport layer, a hole injection layer rand a second electrode which are laminated in sequence, wherein a first electron blocking layer is arranged next to the light-emitting layer between the light-emitting layer and the hole transport layer; and the first electron blocking layer is doped with a hole type non-metallic material. The invention also provides a display devicecontaining the display panel and a preparation method of the display panel. The hole type non-metallic material is doped into EBL, so that the hole number density at the position of a compound interface is increased, the utilization rate of holes is improved, the loss of the holes through the transportation of a functional layer is avoided, the holes can be compounded with transported electrons intime, energy is transferred to an object for timely attenuation light emission so as to avoid the accumulation of excessive electrons at the interface of EBL/EML, the damage defects for the EBL material are reduced, and the service life of the light-emitting device is prolonged.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an organic light-emitting display panel and a display device including the same. Background technique [0002] AMOLED display has attracted more and more attention from research institutions and industries because of its unique ultra-thin, flexible and transparent display. Whether it is a panel of small and medium size or a large size, more and more OLED products are on the market. In small and medium display OLED products, RGB independent lighting is adopted. With the continuous development of products, customers have higher and higher resolutions for products. At the same time, the development of AR / VR products also requires high resolution. The improvement of the resolution and the reduction of the aperture ratio require the brightness of the device in the RGB independent sub-pixel structure to be increased, so there are greater tests and requirements for the life of the RG...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56H01L27/32
CPCH10K59/12H10K71/16H10K85/00H10K50/18H10K71/00H10K85/342H10K85/631H10K85/6572H10K71/164
Inventor 陈磊
Owner BOE TECH GRP CO LTD
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