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Organic light-emitting device and preparation method thereof

An electroluminescent device, an organic technology, applied in the direction of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc.

Inactive Publication Date: 2014-04-16
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 light-emitting device and preparation method thereof

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preparation example Construction

[0069] In another aspect, the present invention provides a method for preparing an organic electroluminescent device, comprising the following steps:

[0070] Prepare the functional layer, light-emitting layer and cathode on the anode substrate;

[0071] Evaporate an organic material film layer on the surface of the cathode by vacuum evaporation, and then prepare a thermal buffer layer and an inorganic material film layer sequentially on the organic material film layer by magnetron sputtering, and finally on the inorganic material film layer A polyethylene terephthalate film layer is arranged on the surface of the material film layer to form an encapsulation layer;

[0072] Apply ultraviolet glue on the edge of the polyethylene terephthalate film, dry and harden the ultraviolet glue by ultraviolet curing, seal and form a closed space, and accommodate the functional layer, luminescent layer and cathode in the In the closed space mentioned above, an organic electroluminescent d...

Embodiment 1

[0097]A method for preparing an organic electroluminescent device, comprising the following steps:

[0098] (1) Preparation of functional layer, light-emitting layer and cathode on the anode substrate

[0099] a. Pretreatment of conductive glass substrate

[0100] Take the ITO glass substrate, wash with acetone → ethanol → deionized water → ethanol in sequence, all of them are cleaned with an ultrasonic cleaner, and the single washing is cleaned for 5 minutes, then blown dry with nitrogen, and dried in an oven for later use; The final ITO glass is subjected to surface activation treatment to increase the oxygen content of the conductive surface layer and improve the work function of the conductive layer surface; the thickness of ITO is 100nm;

[0101] b. Preparation of functional layer, light-emitting layer and cathode

[0102] A hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer and an electron injection layer are sequentially ...

Embodiment 2

[0119] A method for preparing an organic electroluminescent device, comprising the following steps:

[0120] (1) Preparation of functional layer, light-emitting layer and cathode on the anode substrate

[0121] With embodiment one;

[0122] (2) Prepare the encapsulation layer on the cathode

[0123] A 250nm NPB film was prepared on the surface of the cathode by vacuum evaporation as an organic material film layer, and the vacuum degree was controlled at 5×10 -5 Pa, the evaporation rate is

[0124] A thermal buffer layer with a thickness of 120nm was prepared on the surface of the NPB film by magnetron sputtering, and the SiO 2 As a target, the background vacuum is controlled to 5×10 -5 Pa, into the argon, the flow rate is 8sccm;

[0125] In SiO 2 On the surface of the thermal buffer layer, an inorganic material film with a thickness of 100 nm was prepared by magnetron sputtering, and MoO 3 and SiO as the target material, the mass ratio of SiO is 30%, and the backgroun...

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Abstract

The invention provides an organic light-emitting device which comprises an anode substrate, a functional layer, a light-emitting layer, a cathode and an encapsulation layer. Enclosed space is formed by the anode substrate and the encapsulation layer, and the functional layer, the light-emitting layer and the cathode are held in the enclosed space. The encapsulation layer sequentially comprises an organic material film layer, a thermal buffering layer, an inorganic material film layer and a polyethylene glycol terephthalate film layer, wherein the thermal buffering layer is made of SiO or SiO2, and the inorganic material film layer is made of mixed materials formed by V2O5 or MoO3 or ITO or TiO2 or WO3 or GeO2 doped with SiO or SiO2. The encapsulation layer can effectively reduce erosion of oxygen and moisture on the organic light-emitting device, rapid heat conduction can be achieved, heat is evacuated, and therefore the service life of the organic light-emitting device can be effectively prolonged. The invention further provides a preparation method of the organic light-emitting 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 cathode. When a certain voltage is applied between the electrodes, The luminous layer will glow. 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 is considered to be...

Claims

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Application Information

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IPC IPC(8): H01L51/52H01L51/50H01L51/56
CPCH10K50/844H10K71/00
Inventor 周明杰王平钟铁涛黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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