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Organic electroluminescent device and production method thereof

An electroluminescent device and luminescence technology, which is applied in the fields of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of indistinct content and low contrast

Active Publication Date: 2013-06-05
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] OLEDs generally use metal cathode materials with high reflectivity, but high reflectivity cathodes make organic electroluminescent devices have low contrast when used as display devices, so that the displayed content will not be clear under sunlight

Method used

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  • Organic electroluminescent device and production method thereof
  • Organic electroluminescent device and production method thereof
  • Organic electroluminescent device and production method thereof

Examples

Experimental program
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preparation example Construction

[0032] see figure 2 , the preparation method of the organic electroluminescent device of an embodiment, comprises the following steps:

[0033] Step S1 , providing a substrate 10 .

[0034] In this embodiment, the substrate 10 is a polymer film. Polymer film materials are polyethylene terephthalate (PET), polyethersulfone (PES), polyethylene naphthalate (PEN), transparent polyimide (PI), cycloolefin copolymer material (COC) or polycarbonate (PC). The surface of the substrate 10 must be flattened and hardened, and the surface hardness reaches 2H-3H (pencil hardness). Substrate 10 is cleaned prior to use. Firstly, the substrate 10 is ultrasonically cleaned in deionized water containing detergent. After cleaning, it is treated with isopropanol and acetone in ultrasonic for 20 minutes, and then dried with nitrogen to obtain a clean substrate.

[0035] Step S2 , forming an anode 20 on the surface of the substrate 10 .

[0036] In this embodiment, the anode 20 is formed by ev...

Embodiment 1

[0051] The structure of the organic electroluminescent device of this embodiment 1: PET / Ag / m-MTDATA / NPB / FIrPic:CBP / Alq 3 / LiF / Ag / Ag:ZnS / CsF / Ag.

[0052] The preparation process of the organic electroluminescent device of this embodiment 1 is as follows:

[0053] The PET film substrate was placed in deionized water containing detergent for ultrasonic cleaning, and after cleaning, it was treated with isopropanol and acetone in ultrasonic for 20 minutes, and then dried with nitrogen. In a vacuum evaporation system, metal Ag with a thickness of 18 nm was deposited on the surface of the PET film as an anode, and then the anode was treated with oxygen plasma for 2 minutes. After the treatment is completed, continue to vapor-deposit a thickness of 30nmm-MTDATA (4,4′,4″-tris(N-3-methylphenyl-N-phenylamino)triphenylamine) on the anode sequentially as a hole injection layer , with a thickness of 40nm NPB (N, N'-diphenyl-N, N'-bis(1-naphthyl)-1,1'-biphenyl-4,4'-diamine) as the hole tra...

Embodiment 2

[0055] The structure of the organic electroluminescent device in Example 2: PC / Al / m-MTDATA / NPB / FIrPic:CBP / Alq 3 / LiF / Al / Li:ZnSe / NaF / Al.

[0056] The preparation process of the organic electroluminescent device of this embodiment 2 is as follows:

[0057] After the PC film was cleaned according to the treatment method in Example 1, metal Al with a thickness of 20 nm was deposited on the surface of the PC film as an anode, and then the anode was treated with oxygen plasma for 2 minutes. After the treatment, continue to vapor-deposit m-MTDATA (4,4′,4″-tris(N-3-methylphenyl-N-phenylamino)triphenylamine) with a thickness of 50nm on the anode as hole injection layer with a thickness of 60nm NPB (N,N′-diphenyl-N,N′-bis(1-naphthyl)-1,1′-biphenyl-4,4′-diamine) as the hole transport layer with a thickness of 10 nm and a doping ratio of 6% of FIrPic:CBP (FIrPic: bis(4,6-difluorophenyl-N, C2) pyridinecarboyl iridium, CBP: 4,4′-N, N -dicarbazolyl-biphenyl) as the doped light-emitting la...

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Abstract

An organic electroluminescent device comprises a substrate, an anode, a luminous layer and a cathode which are sequentially arranged in a laminating mode. The cathode comprises a first metal layer, a dielectric layer, a metal fluoride layer and a second metal layer which are sequentially arranged on the luminous layer in a laminating mode, wherein the first metal layer is made of silver, aluminum, magnesium, samarium or ytterbium and the thickness of the first metal layer is from 6 to 12 nm; the dielectric layer is made of inorganic transparent materials and mixing metal which are mixed in the inorganic transparent materials, the inorganic transparent materials are metal sulfide or metal selenide, and the thickness of the dielectric layer is from 40 to 80 nm; the metal fluoride layer is made of lithium fluoride, cesium fluoride or sodium fluoride and the thickness of the metal fluoride layer is from 0.5 to 1 nm; and the second metal layer is made of aluminum, silver, aluminum-silver alloy or magnesium-silver alloy and the thickness of the second metal layer is from 80 to 150 nm. The organic electroluminescent device has the advantage of being low in reflectivity. The invention also provides a production method of the organic electroluminescent device.

Description

【Technical field】 [0001] The invention relates to an organic electroluminescence device and a preparation method thereof. 【Background technique】 [0002] Organic Light Emission Diode (Organic Light Emission Diode) or organic electroluminescent device, referred to as OLED, has the characteristics of high brightness, wide range of material selection, low driving voltage, fully cured active light, etc., and has high definition, wide viewing angle, and It can smoothly display the advantages of high-speed response of animation, and OLED can be made into a flexible structure, which can be folded and bent. It is a flat panel display technology and planar light source with great potential, which conforms to the development trend of mobile communication and information display in the information age, and The requirement of green lighting technology has been a very hot research field in the last ten years. [0003] Organic electroluminescent diodes have a sandwich-like structure, wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52
Inventor 周明杰王平冯小明张振华
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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