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Organic light-emitting device and preparation method

An electroluminescent device, organic technology, applied in the direction of organic semiconductor devices, materials of organic semiconductor devices, electric solid devices, etc., can solve the problems of large glass cover or metal cover, increase the weight of the device, and cannot be used for packaging, etc.

Active Publication Date: 2014-07-02
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

[0004] In the traditional technology, a glass cover or a metal cover is used for encapsulation, and its edge is sealed with ultraviolet polymer resin, but the glass cover or metal cover used in this method is often large in size, which increases the weight of the device, and this method cannot be applied to flexible devices. Encapsulation of Organic Electroluminescent Devices

Method used

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  • Organic light-emitting device and preparation method

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Effect test

Embodiment 1

[0044] A method for preparing an organic electroluminescent device, comprising the following steps:

[0045] (1) Take the ITO glass substrate, wash it with acetone → ethanol → deionized water → ethanol in sequence, all of which 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. Carry out surface activation treatment to the cleaned ITO glass substrate again, to increase the oxygen content of the ITO glass substrate surface layer, improve the work function of the ITO glass substrate surface; ITO thickness 100nm;

[0046] (2) A hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer, and a cathode were sequentially prepared on a clean, dry and surface-activated ITO glass substrate by vacuum evaporation, wherein:

[0047] The hole injection layer is made of MoO 3 The mixed material formed by doping 30% mass ...

Embodiment 2

[0065] A method for preparing an organic electroluminescent device, comprising the following steps:

[0066] (1) Take the ITO glass substrate, wash it with acetone → ethanol → deionized water → ethanol in sequence, all of which 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. Carry out surface activation treatment to the cleaned ITO glass substrate again, to increase the oxygen content of the ITO glass substrate surface layer, improve the work function of the ITO glass substrate surface; ITO thickness 100nm;

[0067] (2) A hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer, and a cathode were sequentially prepared on a clean, dry and surface-activated ITO glass substrate by vacuum evaporation, among which, Concrete preparation is with embodiment 1;

[0068] (3) Prepare a protective layer on the ca...

Embodiment 3

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

[0079] (1) Take the ITO glass substrate, wash it with acetone → ethanol → deionized water → ethanol in sequence, all of which 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. Carry out surface activation treatment to the cleaned ITO glass substrate again, to increase the oxygen content of the ITO glass substrate surface layer, improve the work function of the ITO glass substrate surface; ITO thickness 100nm;

[0080] (2) A hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer, and a cathode were sequentially prepared on a clean, dry and surface-activated ITO glass substrate by vacuum evaporation, among which, Concrete preparation is with embodiment 1;

[0081] (3) Prepare a protective layer on the ca...

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Abstract

The invention provides an organic light-emitting device which comprises an anode conductive substrate, a hole injection layer, a hole transporting layer, a luminescent layer, an electron transporting layer, an electron injection layer and a cathode which are successively stacked. The organic light-emitting device also contains a protective layer arranged on the surface of the cathode. The protective layer successively comprises an organic barrier layer, an inorganic barrier layer and a moisture absorption layer. The material of the inorganic barrier layer is metallic telluride which is one or more of Sb2Te3, Bi2Te, CdTe, In2Te3, SnTe and PbTe. The material of the moisture absorption layer is calcium oxide, barium oxide, strontium oxide or magnesium oxide. The invention also provides a preparation method of the organic light-emitting device. By the method, erosion of active materials such as steam, oxygen and the like to the organic light-emitting device can be effectively reduced, and service life of the organic light-emitting device is prolonged.

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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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/56
CPCH10K50/846H10K50/844H10K50/87H10K2102/00H10K71/00
Inventor 周明杰王平钟铁涛陈吉星
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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