An organic electroluminescent device

An electroluminescent device and a luminescent technology, applied in the field of OLED devices, can solve problems such as harsh processes, achieve the effects of improving activity, improving device efficiency, and prolonging device life
CN106898701BActive Publication Date: 2018-11-13KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD +1
4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
Publication Date
2018-11-13

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to an organic electroluminescent device, which comprises a first electrode layer, a light-emitting layer, an electron injection layer and a second electrode layer stacked together, and the electron injection layer and the second electrode layer are arranged in physical contact. The electron injection layer comprises an organic ion salt of benzimidazole represented by formula (I), a benzimidazole neutral organic material represented by formula (II), and a dimerization of benzimidazole organic material represented by formula (III). One or more in the body, this type of material reduces the potential barrier between the second electrode layer and the interface of the organic electron transport layer, improves the transport capacity of carriers, so that the electron injection layer and the The second electrode layer is arranged in direct physical contact, and an insulating buffer layer is no longer required, which has the properties of improving device efficiency and prolonging device life.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of OLED devices, in particular to an organic electroluminescent device. Background technique

[0002] The organic electroluminescent device includes an anode layer, an organic light emitting functional layer and a second electrode layer; the organic light emitting functional layer includes a hole injection layer, a hole transport layer, an organic light emitting layer, an electron transport layer and an electron injection layer. Since there is a large electron injection barrier between the cathode and the interface of the organic electron transport layer, in order to improve the balance between electrons and holes, an insulating buffer layer, such as a LiF layer ( 0.5nm), after the introduction, the potential barrier is reduced, the electron injection ability is significantly improved, the driving voltage is reduced, and the luminous efficiency is improved. However, the evaporation temperature of LiF is high (620-640...

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