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Organic light-emitting device and production method thereof

An electroluminescent device and luminescent technology, which is applied in the direction of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of reduced luminous efficiency, low electron transmission rate, unfavorable electron injection, etc., and achieve enhanced transmission rate , Improve light extraction efficiency, strengthen the effect of scattering

Inactive Publication Date: 2015-05-20
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the existing organic electroluminescent devices, the electron injection layer is one of the important functional layers. During the manufacturing process, due to the poor ability of the material selected for the electron injection layer to isolate water and oxygen, water vapor will penetrate through cracks and affect Electrical Properties of Thin Film Transistors
At the same time, the selected material is not conducive to the injection of electrons, so the transport rate of electrons is low, which is two or three orders of magnitude lower than the transport rate of holes. The area is not in the light-emitting area, so that the luminous efficiency is reduced

Method used

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  • Organic light-emitting device and production method thereof
  • Organic light-emitting device and production method thereof

Examples

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Effect test

preparation example Construction

[0034] The method for preparing the above-mentioned organic electroluminescent device specifically includes the following steps:

[0035] 1. Rinse the glass with distilled water and ethanol, and soak it in isopropanol overnight.

[0036] 2. Prepare a conductive anode film on the glass cleaned in the above steps to obtain an anode conductive substrate, and then vapor-deposit sequentially on the anode conductive substrate to prepare a hole injection layer, a hole transport layer, a light-emitting layer, and an electron transport layer.

[0037] 3. Next, an electron injection layer is prepared on the above electron transport layer, and the electron injection layer is composed of an organic silicon small molecule layer, a rubidium compound doped layer and a titanium dioxide layer. The organic silicon small molecule layer (organic silicon small molecule material with an energy gap of -3.5~-5.5eV) is evaporated by thermal resistance, and the organic silicon small molecule layer is d...

Embodiment 1

[0050] like figure 1 As shown, the organic electroluminescent device in this embodiment is a layered structure, and each layer is in turn:

[0051] Anode conductive substrate 101 of glass / IZO, MoO 3 The hole injection layer 102 of material, the hole transport layer 103 of TAPC material, the light-emitting layer 104 of ADN material, the electron transport layer 105 of TPBI material, the organosilicon small molecule layer 106 of UGH2 material, Rb 2 CO 3 :CsN 3 Rubidium compound doped layer 107, titanium dioxide layer 108, and cathode layer 109 made of Ag. The organic silicon small molecule layer 106, the rubidium compound doped layer 107 and the titanium dioxide layer 108 form an electron injection layer. (where the slash " / " indicates a layered structure, and the colon ":" indicates mutual doping)

[0052] The above-mentioned organic electroluminescent device is prepared according to the following steps in sequence:

[0053] 1. Rinse the glass with distilled water and eth...

Embodiment 2

[0066] The layered structure of the organic electroluminescent device of the following examples 2-4 is basically the same as that of the example 1, so no illustration will be given here.

[0067] The organic electroluminescent device in this embodiment is a layered structure, and each layer is sequentially:

[0068] Anode conductive substrate of glass / IZO, V 2 o 5 Hole injection layer made of NPB material, hole transport layer made of NPB material, light emitting layer made of DCJTB material, electron transport layer made of TPBI material, organic silicon small molecule layer made of UGH1 material, rubidium compound doped layer made of RbCl:CsF material, titanium dioxide layer And the cathode layer of Pt material. The organic silicon small molecule layer, the rubidium compound doped layer and the titanium dioxide layer form the electron injection layer. (where the slash " / " indicates a layered structure, and the colon ":" indicates mutual doping)

[0069] The above-mention...

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Abstract

The invention relates to an organic light-emitting device and a production method thereof. The organic light-emitting device comprises an anode conducting substrate, a hole injection layer, a hole transmission layer, a light-emitting layer, an electron transmission layer, an electron injection layer and a cathode layer which are stacked in sequence. The electron injection layer comprises an organic small molecule silicon layer, a rubidium compound doping layer and a titanium dioxide layer. The organic small molecule silicon layer in the electron injection layer is quite easy to crystallize, the crystallized crystal structure has scattering effect on light, scattering of the light is strengthened, and light-emitting efficiency is improved; injection of electrons is benefited by the rubidium compound doping layer, transmission speed of the electrons is increased, and stability of films is improved; scattering of the light is generated by the titanium dioxide layer, the light is scattered back to the light-emitting layer, and light-emitting efficiency of the organic light-emitting device is improved.

Description

technical field [0001] The invention relates to the field of optoelectronic devices, in particular to an organic electroluminescent device. The invention also relates to a preparation method of the organic electroluminescent device. Background technique [0002] In 1987, C.W.Tang and Van Slyke of Eastman Kodak Company in the United States reported a breakthrough in the research of organic electroluminescence. A high-brightness, high-efficiency double-layer organic electroluminescent device (OLED) was fabricated using ultra-thin film technology, and its brightness reached 1000cd / m at 10V 2 , its luminous efficiency is 1.51 lm / W, and its lifespan is more than 100 hours. [0003] However, in the existing organic electroluminescent devices, the electron injection layer is one of the important functional layers. During the manufacturing process, due to the poor ability of the material selected for the electron injection layer to isolate water and oxygen, water vapor will penetr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56
CPCH10K85/00H10K50/00H10K50/171H10K71/00
Inventor 周明杰黄辉张振华王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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