Packaging structure and packaging method of organic electroluminescent device

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 the outer 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 present invention relates to the technical field of organic electroluminescent devices, in particular to a packaging structure and packaging method of organic electroluminescent devices. Background technique [0002] Small molecule organic electroluminescent devices (OLED) and polymer organic electroluminescent devices (PLED) 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 devices (LCD) and plasma display devices (PDP) are simple and have good application prospects in large-screen flat panel displays and flexible displays. [0003] The structure of the traditional encapsulated organic electroluminescent device is as figure 1 Shown. In the figure, 1 and 2 are device bottom plate and cover plate respectively; 3 is a transparent conductive electrode layer, which also serves as an anode layer in the light-emitting func...

AI Technical Summary

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

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