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Packaging structure and packaging method of organic electroluminescent device

A technology for electroluminescent devices and packaging structures, which is applied in the fields of electro-solid devices, electrical components, semiconductor devices, etc., can solve the problems of loss of gettering ability, damage to organic light-emitting materials, degradation of device life and photoelectric performance, etc. Effects of performance and life, improved reliability, improved mechanical strength and bond strength

Inactive Publication Date: 2010-12-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The bonding performance of epoxy resin is very good, but the permeability of water vapor and oxygen to this material is very high, generally 10 0 -10 -1 g / m 2 Day level, causing water vapor and oxygen to penetrate into the organic electroluminescent device from the sealing of the device
The getter sheet installed in the device loses its getter ability in a short time due to the adsorption of a large amount of water vapor and oxygen, resulting in the gradual accumulation of water vapor and oxygen in the device, which damages the organic light-emitting material in the device, and the life and photoelectric performance of the device Decreased significantly

Method used

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  • Packaging structure and packaging method of organic electroluminescent device
  • Packaging structure and packaging method of organic electroluminescent device
  • Packaging structure and packaging method of organic electroluminescent device

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with accompanying drawing:

[0036] The encapsulation structure of the organic electroluminescent device uses glass or flexible transparent materials as the bottom plate and the cover plate. A transparent conductive film electrode layer and each organic light-emitting functional layer are fabricated on the base plate, and then sealed with the cover plate, and the sealing material is vacuum sealing wax. Vacuum sealing wax has good barrier properties, and its water vapor and oxygen permeability are an order of magnitude lower than that of epoxy resin, which can significantly reduce the penetration of water vapor and oxygen through the sealing layer of organic light-emitting devices and improve the life of organic light-emitting devices . The temperature required for vacuum wax sealing is 80-100°C, which is lower than the glass transition temperature of general organic light-emitting functional layer mat...

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Abstract

The invention discloses a packaging structure of an organic electroluminescent device. The packaging structure comprises a bottom plate 1 and a cover plate 2, wherein the bottom plate 1 is provided with a transparent conductive electrode layer 3; and an organic light-emitting functional layer which at least comprises a hole transport layer 5, a luminous layer 6, an electron transport layer 7 and a cathode layer 8 is arranged on the transparent conductive electrode layer 3 in turn. The packaging structure is characterized in that: a sealing layer 4 at a corresponding sealing position between the bottom plate 1 and the cover plate 2 is made of vacuum sealing wax; and ultraviolet curing resin or thermosetting rein is arranged in a gap formed by the bottom plate 1 and the cover plate 2 on theouter side of the sealing layer 4 to serve as a sealing enhancement layer 5. The packaging structure and a packaging method can overcome the defects in the prior art and reduce the permeation of water vapor and oxygen to water vapor and oxygen on the sealing layer of the device.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescent devices, in particular to a packaging structure and a packaging method of organic electroluminescent devices. Background technique [0002] Small molecule organic electroluminescent devices (OLEDs) and polymer organic electroluminescent devices (PLEDs) have active luminescence, high brightness, full-color display, low driving voltage, thin device thickness, flexible display, and the preparation process is relatively Liquid crystal display (LCD) and plasma display (PDP) are simple and have good application prospects in large-screen flat panel displays and flexible displays. [0003] The structure of traditionally packaged organic electroluminescent devices is as follows figure 1 shown. 1 and 2 in the figure are the device bottom plate and the cover plate respectively; 3 is the transparent conductive electrode layer, which doubles as the anode layer in the light-emitting functio...

Claims

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Application Information

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IPC IPC(8): H01L51/52H01L51/56
Inventor 李军建
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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