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Display device with high brightness and luminous efficiency

A technology for display devices and organic light-emitting layers, which is applied in the manufacture of electrical components, electric solid-state devices, semiconductor/solid-state devices, etc., can solve the problems of unsatisfactory brightness and luminous efficiency of OLED display devices, and improve the brightness and luminous efficiency. Effect

Pending Publication Date: 2020-11-10
LAIWU VOCATIONAL & TECHNICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the brightness and luminous efficiency of the above-mentioned OLED display devices are still unsatisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Using the method of vacuum thermal evaporation, under the monitoring of a high-precision film thickness controller, the beam source evaporation device is used to conduct precise evaporation of organic thin film functional materials, and the following display devices are prepared. Table 1 shows the material and thickness of each functional layer.

[0065] Table 1

[0066] functional layer Material Thickness (nm) anode ITO 100 hole injection layer HAT-CN 10 hole transport layer PPh-TPD 40 organic light emitting layer mCP: Ir(piq) 2 (acac) (2.5%)

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PUM

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Abstract

The invention discloses an OLED display device, and the display device comprises an anode, a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer,an electron injection layer and a cathode; the host material of the organic light-emitting layer is selected from mCP. The display device further includes 2-3 wt% of a dopant. Compared with the priorart, the display device can greatly improve the brightness and the luminous efficiency.

Description

technical field [0001] The invention belongs to the field of display technology, and relates to a display device, in particular to an OLED display device with high brightness and luminous efficiency. Background technique [0002] In 1987, Dr. Deng Qingyun of Kodak Company first invented the organic electroluminescent diode device, which opened the era of fluorescent OLED devices. However, such devices can only utilize singlet excitons and have a low internal quantum efficiency of only 25%. In 1998, Forrest and others from Princeton University in the United States successfully developed phosphorescent OLED materials and applied them to OLED devices, thus opening the era of phosphorescent OLED devices. This kind of material contains rare metals, and the internal quantum efficiency can reach 100% in theory, thus greatly improving the efficiency of OLED. However, the production cost of such materials is high, and the device efficiency "rolls off" under high brightness and high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/54H01L51/50
CPCH10K85/615H10K85/654H10K50/11
Inventor 吕元锋李淑廷
Owner LAIWU VOCATIONAL & TECHNICAL COLLEGE