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

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  • Organic light-emitting device and preparation method thereof

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Example Embodiment

[0069] On the other hand, the present invention provides a method for preparing an organic electroluminescent device, which includes the following steps:

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

[0071] The organic material film layer is vapor-deposited on the surface of the cathode by vacuum evaporation, and then the thermal buffer layer and the inorganic material film layer are sequentially prepared on the organic material film layer by magnetron sputtering, and finally the inorganic material film layer is prepared on the organic material film layer. A polyethylene terephthalate film layer is arranged on the surface of the material film layer to form an encapsulation layer;

[0072] Coat the edge of the polyethylene terephthalate film with ultraviolet glue, dry and harden the ultraviolet glue by ultraviolet curing, seal to form a closed space, and house the functional layer, the light-emitting layer and the cathode in the ...

Example Embodiment

[0096] Example 1

[0097] A method for preparing an organic electroluminescent device includes 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 and perform acetone cleaning → ethanol cleaning → deionized water cleaning → ethanol cleaning, all are cleaned with an ultrasonic cleaning machine, and the single washing is cleaned for 5 minutes, and then dried with nitrogen, and the oven is dried for use; The latter ITO glass undergoes 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] The method of vacuum evaporation is used to sequentially form a hole injection layer, a hole transport layer, a light emitting l...

Example Embodiment

[0118] Example 2

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

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

[0121] Same as Example One;

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

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

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

[0125] In SiO 2 Magnetron sputtering is used to prepare an inorganic material film with a thickness of 100nm on the surface of the thermal buffer layer, using MoO 3 And SiO as the target material, the mass ratio of SiO is 30%, and the background vacuum d...

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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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