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Organic light-emitting device and preparation method thereof

An electroluminescent device and luminescent technology, which is applied in the direction of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., to achieve the effects of improving light transmittance, cheap materials, and excellent packaging effects

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
  • Organic light-emitting device and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0055] A method for preparing an organic electroluminescent device, comprising the following steps:

[0056] (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; Carry out surface activation treatment to the cleaned ITO glass substrate 1 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;

[0057] (2) Preparation of functional layer and light-emitting layer:

[0058] Hole injection layer 2: Evaporated MoO on ITO glass 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...

Embodiment 2

[0071] A method for preparing an organic electroluminescent device, comprising the following steps:

[0072] (1), (2), (3) are the same as embodiment 1;

[0073] (4) Preparation of organic barrier layer: CuPc was prepared on the cathode layer by vacuum evaporation, vacuum degree 5×10 -5 Pa, evaporation rate Thickness 250nm;

[0074] (5) Preparation of inorganic barrier layer: The inorganic barrier layer is prepared on the organic barrier layer by vacuum evaporation. The material of the inorganic barrier layer is a mixed material formed by a low refractive index material and a high refractive index material. The low refractive index material is MgF 2 , high refractive index materials are ZnSe, MgF 2 The mass fraction of the entire film layer is 60%, and the vacuum degree is 5×10 -5 Pa, evaporation rate Thickness 100nm;

[0075] (6) After step (5), use the same method and material as step (4) to prepare an inorganic barrier layer, and then use the same method and materi...

Embodiment 3

[0079] A method for preparing an organic electroluminescent device, comprising the following steps:

[0080] (1), (2), (3) are the same as embodiment 1;

[0081] (4) Preparation of organic barrier layer: NPB was prepared on the cathode layer by vacuum evaporation with a vacuum degree of 5×10 -5 Pa, evaporation rate Thickness 200nm;

[0082] (5) Preparation of inorganic barrier layer: The inorganic barrier layer is prepared on the organic barrier layer by vacuum evaporation. The material of the inorganic barrier layer is a mixed material formed by a low refractive index material and a high refractive index material. The low refractive index material is LiF, the high refractive index material is CdS, LiF accounts for 50% of the mass fraction of the entire film, and the vacuum degree is 5×10 -5 Pa, evaporation rate Thickness 150nm;

[0083] (6) After step (5), use the same method and material as step (4) to prepare an inorganic barrier layer, and then use the same method a...

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Abstract

The invention provides an organic light-emitting device which comprises an anode conductive substrate, a functional layer, a light-emitting layer, a cathode layer and an encapsulation layer, wherein the anode conductive substrate, the functional layer, the light-emitting layer, the cathode layer and the encapsulation layer are stacked in sequence. 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 an organic barrier layer, an inorganic barrier layer and a polyethylene terephthalate film, and the organic barrier layer and the inorganic barrier layer are stacked alternately to form a multilayered structure. 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 therefore organic functional materials and electrodes of the organic light-emitting device are effectively protected, light transmittance of the organic light-emitting device is improved, and the service life of the organic light-emitting device can be remarkably prolonged. The method is particularly suitable for encapsulation of flexible organic light-emitting devices.

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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IPC IPC(8): H01L51/52H01L51/54H01L51/56C23C14/24
CPCH10K50/844H10K50/8445H10K71/00
Inventor 周明杰王平钟铁涛黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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