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
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the invention is especially suitable for e

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Organic light-emitting device and preparation method thereof
  • Organic light-emitting device and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0054] Example 1:

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

[0056] (1) ITO glass substrate 1 pre-treatment: acetone cleaning→ethanol cleaning→deionized water cleaning→ethanol cleaning, all are cleaned with an ultrasonic cleaning machine, and a single wash is cleaned for 5 minutes, then dried with nitrogen, and dried in an oven for later use; Perform surface activation treatment on the cleaned ITO glass substrate 1 to increase the oxygen content of the conductive surface layer and increase the work function of the conductive layer surface; the thickness of ITO is 100 nm;

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

[0058] Hole injection layer 2: MoO is evaporated on ITO glass 1 3 Mixed material obtained by doping with NPB, MoO 3 The doping mass fraction of 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 evaporati...

Example Embodiment

[0070] Example 2:

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

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

[0073] (4) Preparation of organic barrier layer: CuPc is prepared on the cathode layer by vacuum evaporation, with a vacuum degree of 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 mixture of low refractive index material and 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 whole film is 60%, and the vacuum degree is 5×10 -5 Pa, evaporation rate Thickness of 100nm;

[0075] (6) After step (5), an inorganic barrier layer is prepared using the same method and material as in step (4), and then an organic barrier layer is prepared...

Example Embodiment

[0078] Example 3:

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

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

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

[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 mixture of low refractive index material and high refractive index material. The low refractive index material is LiF, the high refractive index material is CdS, the mass fraction of LiF in the entire film is 50%, and the vacuum degree is 5×10 -5 Pa, evaporation rate 150nm thickness;

[0083] (6) After step (5), an inorganic barrier layer is prepared using the same method and material as in step (4), and then an organic barrier layer is prepared on the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Water oxygen permeabilityaaaaaaaaaa
Water oxygen permeabilityaaaaaaaaaa
Water oxygen permeabilityaaaaaaaaaa
Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap