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Organic light-emitting device and preparation method thereof

An electroluminescence device and electroluminescence technology, which are applied in the fields of electric solid state devices, semiconductor/solid state device manufacturing, electrical components, etc., can solve the problems of short lifespan of light-emitting devices, influence device lifespan, increase device weight, etc., and achieve a simple preparation method. , the material is cheap, and the effect of easy large-scale preparation

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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Problems solved by technology

[0004] Organic electroluminescent devices generally have a short lifespan at present, so the quality of the packaging directly affects the lifespan of the device
In traditional technology, a glass or metal cover is used for encapsulation, and its edges are sealed with UV polymer resin, but the glass or metal cover used in this method is often bulky, which increases the weight of the device

Method used

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

Examples

Experimental program
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Embodiment 1

[0059] A method for preparing an organic electroluminescent device, comprising the following steps:

[0060] (1) Pre-treatment of ITO glass substrate 1: cleaning with acetone→cleaning with ethanol→cleaning with deionized water→cleaning with ethanol, all of which are cleaned with an ultrasonic cleaner for 5 minutes in a single wash, then blown dry with nitrogen, and dried in an oven for later use; The cleaned ITO glass substrate 1 also needs 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;

[0061] (2) Preparation of functional layer and light-emitting layer: hole injection layer 2: evaporate MoO on ITO glass substrate 1 3 Hybrid material obtained by doping NPB, MoO 3 The doping mass fraction is 30%, and the evaporation is carried out by high-vacuum coating equipment, and the vacuum degree during evaporation is 1×10 -5 Pa, the evaporation ra...

Embodiment 2

[0078] A method for preparing an organic electroluminescent device, comprising the following steps:

[0079] (1), (2), (3) are the same as embodiment 1;

[0080] (4) Preparation of protective layer: CuPc was prepared on the cathode layer by vacuum evaporation method, vacuum degree 1×10 -5 Pa, evaporation rate Thickness 200nm;

[0081] (5) Preparation of barrier layer:

[0082] (a) Preparation of the first organic barrier layer: prepared on a PET film, the first organic barrier layer is polytetrafluoroethylene, prepared by spin coating first and then exposed, prepared in an inert atmosphere, and the coating thickness is 1.5 μm. Then use UV light (λ=365nm) to cure, the light intensity is 15mW / cm 2 , exposure time 300s;

[0083] (b) Preparation of oxide layer: prepared on the first organic barrier layer, the oxide layer material is SiO 2 , prepared by magnetron sputtering, the background vacuum is 1×10 -5 Pa, thickness 150nm;

[0084] (c) Preparation of the second organi...

Embodiment 3

[0091] A method for preparing an organic electroluminescent device, comprising the following steps:

[0092] (1), (2), (3) are the same as embodiment 1;

[0093] (4) Preparation of protective layer: prepare Alq on the cathode layer by vacuum evaporation 3 , vacuum degree 5×10 -5 Pa, evaporation rate Thickness 250nm;

[0094] (5) Preparation of barrier layer:

[0095] (a) Preparation of the first organic barrier layer: prepared on a PET film, the first organic barrier layer is methylcyclopentenolone, prepared by spin coating and then exposed, prepared in an inert atmosphere, the coating thickness is 1μm, then cured with UV light (λ=365nm), light intensity 10mW / cm 2 , exposure time 200s;

[0096] (b) Preparation of oxide layer: prepared on the first organic barrier layer, the oxide layer material is TiO 2 , prepared by magnetron sputtering, the background vacuum is 5×10 -5 Pa, thickness 100nm;

[0097] (c) Preparation of the second organic barrier layer: prepared on th...

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Abstract

The invention provides an organic light-emitting device which sequentially comprises an anode conductive substrate, a functional layer, a light-emitting layer, a cathode layer and an encapsulation layer. Enclosed space is formed by the anode conductive substrate and the encapsulation layer, and the functional layer, the light-emitting layer and the cathode layer are arranged in the enclosed space. The encapsulation layer sequentially comprises a protective layer, a barrier layer and a polyethylene terephthalate film, wherein the barrier layer sequentially comprises a first organic barrier layer, an oxide layer, a second organic barrier layer and a nitride layer, the first organic barrier layer and the second organic barrier layer are made of different materials, the first organic barrier layer, the oxide layer, the second organic barrier layer and the nitride layer form a basic structure, and the barrier layer is formed by multiple basic structures in a repeated mode. The invention further provides a preparation method of the organic light-emitting device. The method can effectively reduce erosion of moisture and oxygen on the organic light-emitting device, and the service life of the organic light-emitting device can be remarkably prolonged.

Description

technical field [0001] The invention relates to the related field of electronic devices, 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 to prepare an organic luminescent material with a thickness of tens of nanometers on the ITO glass as a light-emitting layer, and a metal electrode with a low work function is placed above the light-emitting layer. When a voltage is applied to the electrodes, the light-emitting layer produces light radiation. [0003] OLED devices have the advantages of active luminescence, high luminous efficiency, low power consumption, lightness, thinness, and no viewing angle restrictions. They are considered by industry insiders to be the new generation of devices that are most likely to occupy a dominant position in the future lighting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/54H01L51/56C23C14/35
CPCH10K50/844H10K50/8445H10K71/00
Inventor 周明杰王平钟铁涛冯小明
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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