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A white light organic electroluminescent device

An electroluminescent device, an organic technology, applied in the direction of electric solid-state devices, electrical components, semiconductor devices, etc., can solve the problems of low device efficiency, light color difference, different structure of white light devices, etc., and achieve high color stability and device efficiency. The effect of high and multiple luminescence bands

Inactive Publication Date: 2016-11-30
GUANGZHOU SKYWORTH PLANE DISPLAY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, conventional multi-layer devices and multi-doped devices are difficult to control the distribution ratio of excitons in each light-emitting material, resulting in low device efficiency, light chromatic aberration, and spectrum change with operating voltage, which hinders the practical application of white OLED devices. Application in products
At the same time, due to the difference in triplet energy between blue fluorescence and blue phosphorescence, the structure of the corresponding white light device is often very different, which increases the difficulty of structural design.

Method used

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  • A white light organic electroluminescent device
  • A white light organic electroluminescent device
  • A white light organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A white light organic electroluminescent device, such as figure 1 As shown, there are p-type body-doped non-blue light layer 05, p-type transmission blocking layer 06, non-doped blue light layer 07, n-type transmission blocking layer 08 and n-type body-doped non-blue light layer 09 in sequence from bottom to top , also provided with substrate 01, anode 02, hole injection layer 03, hole transport layer 04, electron transport layer 10 and cathode 11, substrate 01, anode 02, hole injection layer 03, hole transport layer 04, p-type The main body-doped non-blue light layer 05, the p-type transport blocking layer 06, the non-doped blue light layer 07, the n-type transport blocking layer 08 and the n-type main body-doped non-blue light layer 09, the electron transport layer 10 and the cathode 11 are arranged from bottom to top The order of the above stacks the settings one by one.

[0044] It should be noted that the layered structure of the white light organic electroluminesce...

Embodiment 2

[0070] A white light organic electroluminescence device was prepared and its performance was tested.

[0071] Description of materials used:

[0072] ITO: indium tin oxide;

[0073] HAT-CN: Dipyrazine [2,3- f :2',3'- h ]quinoxaline-2,3,6,7,10,11-hexamethancyanogen;

[0074] NPB: N,N'-di(naphthalene-1-yl)-N,N'diphenyl-benzidine;

[0075] Ir(MDQ) 2 (acac): (acetylacetonate) bis(2-methyldibenzo[F,H]quinoxaline) iridium;

[0076] TCTA: Tris(4-carbazol-9-yl-phenyl)amine;

[0077] Firpic: bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridine)iridium;

[0078] TPBi: 1,3,5-tris(1-phenyl-1H-benzimidazol-2-yl)benzene;

[0079] Ir(ppy) 3 : Tris(2-phenylpyridine) iridium;

[0080] Bepp 2 : Bis(2-(2-phenolyl)pyridine)beryllium.

[0081] In this embodiment, the adopted process flow is as follows: firstly, the commercial ITO glass is patterned, cleaned, and dried, and sent to the vacuum evaporation equipment; then the organic layers are prepared by vacuum thermal deposition; ...

Embodiment 3

[0100] A white light organic electroluminescence device was prepared and its performance was tested.

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Abstract

A white light organic electroluminescent device, which is sequentially provided with a p-type main body doped non-blue light layer, a p-type transmission blocking layer, a non-doped blue light layer, an n-type transmission blocking layer, and an n-type main body doped non-blue light layer from bottom to top. The layer is also provided with a substrate, an anode, a hole injection layer, a hole transport layer, an electron transport layer and a cathode; the triplet energy level of the material of the p-type transport barrier layer is greater than the triplet energy level of the material of the p-type host-doped non-blue light layer State energy level; the triplet energy level of the material of the n-type transmission barrier layer is greater than the triplet energy level of the material of the n-type host-doped non-blue light layer. The emission peak of the non-doped blue light layer is between 400-490nm, and the emission peak of the guest material of the p-type and n-type host-doped non-blue light layer is between 500-640nm. The white light organic electroluminescent device has high color stability, multiple light-emitting bands and high device efficiency.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescent devices, in particular to a white light organic electroluminescent device. Background technique [0002] At present, the application of white organic light emitting device (white organic light emitting device, referred to as white OLED) in display and lighting will become a new direction of display and lighting technology in the future. The requirements for the application of white light OLED in display and lighting technology are multi-band, stable color, and high efficiency, so as to meet the high color gamut, color stability, low power consumption and other parameters required by display technology, and also meet the high color rendering required by lighting technology Parameters such as exponent and high efficiency. [0003] White light is obtained by combining colors such as red, green, blue, and yellow. Usually, various colors are realized by their corresponding luminesce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56
Inventor 苏跃举邹建华陈冬庆徐苗陶洪王磊
Owner GUANGZHOU SKYWORTH PLANE DISPLAY TECH
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