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Blue light emitting device, display panel and display device

A technology of blue light emission and devices, which is applied in the manufacture of electric solid-state devices, semiconductor devices, semiconductor/solid-state devices, etc. It can solve the problems of low gray-scale color shift of display panels, low gray-scale efficiency of blue light, and affecting the display effect of display panels, etc. , to achieve the effect of increasing the number of electron injection, improving the display effect, and improving the efficiency of low grayscale of blue light

Pending Publication Date: 2022-04-05
YUNGU GUAN TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned display panel has the problem of low gray-scale efficiency of blue light, which leads to low-gray-scale color shift in the display panel and affects the display effect of the display panel.

Method used

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  • Blue light emitting device, display panel and display device
  • Blue light emitting device, display panel and display device
  • Blue light emitting device, display panel and display device

Examples

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Embodiment Construction

[0046] In the OLED display panel, the light-emitting layer includes a blue light-emitting layer, a red light-emitting layer, a green light-emitting layer, wherein the material of the blue light-emitting layer, the light-emitting efficiency of the blue light-emitting layer is related to electron injection. However, in the low gray order of the blue light, the total current density is small, the total number of electrons is small, and the electrons are migrated by the cathode to the blue light-emitting layer, because the energy barrier between the hole blocking layer and the blue light-emitting layer is high, The amount of water-ray light-emitting layer is small, resulting in low blue light low ash, and the luminous brightness is dark, thereby causing the display panel to present color polarization.

[0047] For the above technical problem, the present application provides a blue light-emitting device, a display panel, and a display device that sets an electronic transition layer be...

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Abstract

The invention provides a blue light emitting device, a display panel and a display device, relates to the technical field of display, and is used for solving the technical problem of relatively low blue light low gray scale efficiency of an existing display panel. The blue light emitting device comprises an anode, a light emitting layer, a hole blocking layer and a cathode which are sequentially stacked, an electron transition layer is arranged between the light emitting layer and the hole blocking layer, and the electron transition layer comprises a blue light host material and a hole blocking material. The LUMO energy level difference between the blue light host material and the hole blocking material is not greater than 0.3 eV. According to the display panel and the display device, the electron injection number during low-gray-scale blue light can be increased, the low-gray-scale blue light efficiency is improved, low-gray-scale color cast of the display panel is avoided, and the display effect of the display panel and the display device is improved.

Description

Technical field [0001] The present application relates to the field of display, and in particular, to a blue light-emitting device, a display panel, and a display device. Background technique [0002] Organic Light-Emitting Diode, referred to as OLED display technology has low cost, wide viewing angle, low drive voltage, fast response, simple color color, simple preparation process, can achieve large area flexibility display, etc. One of the most developed display technologies. [0003] The OLED display panel includes a substrate and a plurality of organic light emitting units, and a plurality of organic light-emitting unit arrays are arranged on a substrate. Among them, the organic light-emitting unit includes a laminated anode layer, a hole injection layer, a hole transport layer, an electron blocking layer, an organic light-emitting layer, a hole blocking layer, an electron transport layer, an electron injection layer, and a cathode layer. Under the driving of the voltage, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L27/32
Inventor 王晓文赵伟黄智姚纯亮
Owner YUNGU GUAN TECH CO LTD
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