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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 problem of low luminous efficiency

Inactive Publication Date: 2014-08-06
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the luminous efficiency of organic electroluminescent devices is low at present

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] Please also see figure 2 , the preparation method of the organic electroluminescent device 100 of an embodiment, it comprises the following steps:

[0042] Step S110 , sequentially vapor-depositing the hole injection layer 20 , the first hole transport layer 32 , the first light emitting layer 34 and the first electron transport layer 36 on the surface of the anode.

[0043] The anode 10 is indium tin oxide glass (ITO), aluminum zinc oxide glass (AZO) or indium zinc oxide glass (IZO), preferably ITO.

[0044] In this embodiment, before the hole injection layer 20 is formed on the surface of the anode 10, the anode 10 is pretreated. The pretreatment includes: performing photolithography on the anode 10, cutting it into the required size, using detergent, deionized Water, acetone, ethanol, and isopropanone were each ultrasonically cleaned for 15 minutes to remove organic pollutants on the surface of the anode 10 .

[0045] The hole injection layer 20 is formed on the s...

Embodiment 1

[0068] The structure prepared in this example is ITO glass / MoO 3 / TAPC / Alq 3 / Bphen / Ag:LiF / MoO 3 / Pt:CuPc / NPB / Alq 3 / Bphen / LiF / Ag organic electroluminescent devices.

[0069] First carry out photolithography treatment on ITO, cut it into the required size, and then use detergent, deionized water, acetone, ethanol, and isopropanol to sonicate for 15 minutes each to remove organic pollutants on the glass surface; evaporate the hole injection layer , the material is MoO 3 , the thickness is 30nm; evaporate the first hole transport layer, the material is TAPC, the thickness is 50nm; evaporate the first light-emitting layer, the material is Alq 3 , the thickness is 25nm; evaporate the first electron transport layer, the material is Bphen, the thickness is 50nm; prepare the charge generation layer: it is composed of n-type doped layer, metal oxide layer and p-type doped layer, n-type doped layer The materials include Ag and LiF doped with Ag, the mass ratio of LiF to Ag is 3:10...

Embodiment 2

[0074] The structure prepared in this example is AZO / V 2 o 5 / NPB / ADN / TPBi / Al: Li 2 CO 3 / WO 3 / Au:MgPc / TCTA / ADN / TPBi / CsN 3 / Pt organic electroluminescent devices.

[0075] First, the AZO glass substrate was washed with detergent, deionized water, and ultrasonic for 15 minutes to remove organic pollutants on the glass surface; the hole injection layer was prepared by evaporation, and the material was V 2 o 5 , the thickness is 80nm; the first hole transport layer is prepared by evaporation, the material is NPB, and the thickness is 60nm; the first light-emitting layer is prepared by evaporation, the material is ADN, and the thickness is 5nm; the first electron transport layer is prepared by evaporation, and the material is TPBi, with a thickness of 200nm; the charge generation layer prepared by vapor deposition: composed of n-type doped layer, metal oxide layer and p-type doped layer, the material of n-type doped layer includes Al and Li doped in Al 2 CO 3 , Li 2 CO ...

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Abstract

The invention provides an organic light-emitting device. The organic light-emitting device comprises an anode, a hole injection layer, a first hole transport layer, a first light-emitting layer, a first electron transport layer, a charge generation layer, a second hole transport layer, a second light-emitting layer, a second electron transport layer, an electron injection layer and a cathode which are laminated sequentially. The charge generation layer comprises an n-type doped layer laminated on the surface of the first electron transport layer, a metal oxide layer formed on the surface of the n-type doped layer and a p-type doped layer formed on the surface of the metal oxide layer, the n-type doped layer is made of materials including metal and lithium compounds doped in the metal, a mass ratio between the lithium compounds and the metal in the n-type doped layer is 1:5-1:22, the metal oxide layer is made of materials selected from at least one of molybdenum trioxide, tungsten trioxide and vanadium pentoxide, and the p-type doped layer is made of materials including metal and phthalocyanine compounds doped in the metal. The organic light-emitting device is high in light emitting efficiency. The invention further provides a production method of the organic light-emitting device.

Description

technical field [0001] The invention relates to an organic electroluminescence device and a preparation method thereof. Background technique [0002] The luminescence principle of organic electroluminescent devices is based on the action of an external electric field, electrons are injected from the cathode to the lowest unoccupied molecular orbital (LUMO) of organic matter, and holes are injected from the anode to the highest occupied molecular orbital (HOMO) of organic matter. Electrons and holes meet, recombine, and form excitons in the light-emitting layer. Excitons migrate under the action of an electric field, transfer energy to the light-emitting material, and excite electrons to transition from the ground state to the excited state. The excited state energy is deactivated by radiation to generate photons , releasing light energy. However, the luminous efficiency of organic electroluminescent devices is relatively low at present. Contents of the invention [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/54H01L51/56
CPCH10K85/311H10K50/131H10K50/15H10K50/16H10K50/17H10K50/171
Inventor 周明杰王平黄辉陈吉星
Owner OCEANS KING LIGHTING SCI&TECH CO LTD