White-light organic electroluminescence device of organic micromolecule multidoped luminescent layer and manufacturing method thereof

A technology of electroluminescent devices and light-emitting layers, which is applied in the fields of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., and can solve problems such as simultaneous co-doping of multiple materials

Inactive Publication Date: 2010-02-10
XIAMEN DONGLIN ELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the difficulty of simultaneous co-doping of multiple materials in the evaporation process, reduce manufacturing costs, and improve the color stability of the device, the present invention has developed a wet method for preparing various luminescent materials and functional materials on the polymer hole transport layer. Simultaneously co-doped white organic electroluminescent devices

Method used

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  • White-light organic electroluminescence device of organic micromolecule multidoped luminescent layer and manufacturing method thereof
  • White-light organic electroluminescence device of organic micromolecule multidoped luminescent layer and manufacturing method thereof
  • White-light organic electroluminescence device of organic micromolecule multidoped luminescent layer and manufacturing method thereof

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Embodiment 1

[0043] now refer to figure 1 , the electroluminescent device according to the first embodiment of the present invention has the following structure:

[0044] ITO(100nm) / PVK:F4-TCNQ(40nm) / DPVBi:TPD:Rubrene:DCJTB(40nm) / BCP(10nm) / Alq 3 (30nm) / LiF(0.6nm) / Al(80nm)

[0045] A certain amount of PVK doped with F4-TCNQ on ITO (this example doping concentration is 5%) is the hole-transport layer; continue to spin-coat on it with DPVBi as the blue light-emitting material and the host material after the drying treatment, The hole transport material TPD (diphenylarylamine) is blended with a mixture of orange dye Rubrene and red dye DCJTB to obtain a light-emitting layer with a film thickness of 40nm; after drying, it is placed in a vacuum chamber to evaporate holes to block layer and electron transport layer, and Al combined cathode. In this embodiment, the TPD concentration of the light-emitting layer is 40%, the Rubrene doping concentration is 0.15%, and the DCJTB doping concentration...

Embodiment 2

[0048] now refer to figure 1 , the electroluminescent device according to the second embodiment of the present invention has the following structure:

[0049] ITO(100nm) / PVK(40nm) / DPVBi:TPD:Rubrene:DCJTB(40nm) / BCP(10nm) / Alq 3 (30nm) / LiF(0.6nm) / Al(80nm)

[0050] After the preparation method of the device is the same as that of the above embodiment 1, the test is carried out, and the highest brightness of the device can be achieved, and the efficiency is above 4.0 cd / A.

[0051] The luminance-voltage curve of the organic electroluminescent device of this embodiment 2 is as follows Figure 5 , the color coordinates change with the voltage as Image 6 .

[0052] The spin-coated organic small molecule multi-doped light-emitting layer (DPVBi:TPD (40%):Rubrene:DCJTB) used in the embodiment 1-2 of the present invention has a phase diagram, surface morphology and surface morphology of a separate DPVBi on PVK Appearance AFM diagram White organic electroluminescent device brightness...

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Abstract

The invention discloses a white-light organic electroluminescence device of an organic micromolecule multidoped luminescent layer. The device sequentially coats a polymer hole transmission layer and an organic micromolecule luminescent layer on ITO in a rotation mode, and the device has the following structure: ITO / polymer hole transmission layer / various organic micromolecule dye mixing layers / BCP / Alq3 / LiF / Al. The invention also discloses a manufacturing method of the device, comprising: sequentially forming a P-type polymer hole transmission layer and an organic micromolecule multidoped system luminescent layer; combining a hole blocking layer with an electronic transmission layer to prepare the white-light organic electroluminescence device. In the electroluminescence layer of the invention, which is manufactured with various co-doped materials, the amount of co-doped materials is not limited, doping proportion is easy to adjust and can be precisely controlled; the invention has simple technology, low cost, favourable colour stability of obtained devices and high device luminance and efficiency; after optimizing, efficiency of the device can exceed that of micromolecule evaporation devices; if the service life is improved, the invention is suitable for large-area illumination and LCD backlight source.

Description

technical field [0001] The invention relates to a preparation method of a white organic electroluminescence device in the technical field of organic electroluminescence. Background technique [0002] Organic light-emitting display (OLED) is a new type of flat panel display technology, which has broad application prospects due to its many advantages. White organic electroluminescent devices are expected to be used as backlight sources for lighting and flat panel displays, and have received great attention from academia and industry, and are one of the highlights of OLED research. [0003] At present, the manufacturing processes of white organic electroluminescent devices mainly include wet processes based on polymer materials and evaporation processes based on small molecule materials. The wet process has the advantages of simple process, low manufacturing cost, and easy to manufacture in large areas, but its performance is often poor. It is reported that the brightness of t...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/52H01L51/54H01L51/56
Inventor 吴朝新张新稳侯洵
Owner XIAMEN DONGLIN ELECTRONICS
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