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Organic electroluminescent device and preparation method thereof

An electroluminescent device and luminescent technology, which is applied in the direction of electric solid device, semiconductor/solid device manufacturing, electrical components, etc., to achieve the effect of high compactness, high thermal stability, and prolong service life

Inactive Publication Date: 2014-12-03
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

The method of the invention is especially suitable for encapsulating flexible organic electroluminescent devices

Method used

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  • Organic electroluminescent device and preparation method thereof

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Embodiment 1

[0054] A method for preparing an organic electroluminescent device, comprising the following steps:

[0055] (1) Preparation of luminescent functional layer and cathode on the anode substrate

[0056] a. Pretreatment of conductive glass substrate

[0057] Take the ITO glass substrate, wash it with acetone, ethanol, pure water and ethanol in sequence, and use an ultrasonic cleaner to clean it for 5 minutes each time. After drying, clean the surface of the cleaned ITO glass substrate. Activation treatment; ITO thickness 100nm;

[0058] b. Preparation of luminescent functional layer and cathode

[0059] A hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer and a cathode are sequentially prepared on an ITO glass substrate by vacuum evaporation;

[0060] Preparation of the hole injection layer: the MoO 3 Doped into N,N'-diphenyl-N,N'-di(1-naphthyl)-1,1'-biphenyl-4,4'-diamine (NPB) as hole injection layer...

Embodiment 2

[0074] A method for preparing an organic electroluminescent device, comprising the following steps:

[0075] (1) Preparation of luminescent functional layer and cathode on the anode substrate

[0076] Same as embodiment 1.

[0077] (2) The encapsulation layer unit is repeatedly prepared on the cathode for 5 times to form an encapsulation layer with a composite structure to obtain an organic electroluminescent device;

[0078]The encapsulation layer unit includes a mixed barrier layer and an inorganic barrier layer stacked in sequence;

[0079] a. A mixed barrier layer with a thickness of 300nm is prepared on the surface of the cathode by vacuum evaporation, and the material of the mixed barrier layer is NPB doped with V 2 o 5 A mixed material formed with Al, in the mixed material, V 2 o 5 The mass fraction is 40%, the mass fraction of Al is 30%, and the vacuum degree of the evaporation process is 5×10 -5 Pa, the evaporation rate is

[0080] b. Prepare an inorganic bar...

Embodiment 3

[0084] A method for preparing an organic electroluminescent device, comprising the following steps:

[0085] (1) Preparation of luminescent functional layer and cathode on the anode substrate

[0086] Same as embodiment 1.

[0087] (2) The encapsulation layer unit is repeatedly prepared on the cathode for 5 times to form an encapsulation layer with a composite structure to obtain an organic electroluminescent device;

[0088] The encapsulation layer unit includes a mixed barrier layer and an inorganic barrier layer stacked in sequence;

[0089] a. A mixed barrier layer with a thickness of 200nm is prepared on the surface of the cathode by vacuum evaporation, and the material of the mixed barrier layer is Alq3 doped WO 3 The mixed material formed with Ni, in the mixed material, WO 3 The mass fraction of Ni is 30%, the mass fraction of Ni is 10%, and the vacuum degree of the evaporation process is 5×10 -5 Pa, the evaporation rate is

[0090] b. Prepare an inorganic barrie...

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Abstract

The invention provides an organic electroluminescent device which comprises the components of: an anode substrate, a light emitting functional layer, a cathode and a packaging layer; wherein the anode substrate, the light emitting functional layer, the cathode and the packaging layer are successively laminated. The packaging layer has a composite structure which is formed through repeatedly arranging packaging layer units. Each packaging layer unit comprises a mixed barrier layer and an inorganic barrier layer which are successively laminated. The mixed barrier layer is made of a mixed material which is formed by doping an organic material, a metal oxide and a metal. The metal oxide is molybdena, vanadic anhydride, tungsten trioxide, cesium oxide, nickel oxide or manganese dioxide. The inorganic barrier layer is made of a mixed material which is formed by a metal fluoride and a metal sulfide. The metal fluoride is lithium fluoride, cesium fluoride, magnesium fluoride, aluminum fluoride, calcium fluoride or barium fluoride. The metal sulfide is cadmium sulfide, lead sulfide, iron disulfide, copper sulfide, zinc sulfide or nickel sulfide. The invention further provides a preparation method for the organic electroluminescent device. The preparation method can effectively reduce erosion of water and oxygen to the organic electroluminescent device, and prolongs service life of the organic electroluminescent device.

Description

technical field [0001] The invention relates to an organic electroluminescent device, in particular to an organic electroluminescent device and a preparation method thereof. Background technique [0002] Organic electroluminescent device (OLED) is a current-mode semiconductor light-emitting device based on organic materials. Its typical structure is that a multi-layer organic material film (hole injection layer, hole transport layer, light emitting layer, electron transport layer and electron injection layer) is sandwiched between the transparent anode and the metal cathode. When a certain voltage is applied between the electrodes , the luminescent layer will emit light. In recent years, due to its low production cost, short response time, high luminance, wide viewing angle, low driving voltage, energy saving and environmental protection, organic electroluminescent devices have received extensive attention in the fields of full-color display, backlight and lighting. And it...

Claims

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Application Information

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IPC IPC(8): H01L51/52H01L51/54H01L51/56
CPCH10K50/18H10K50/80H10K50/84H10K71/00
Inventor 周明杰钟铁涛张振华王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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