Organic electroluminescent device

Abstract

The invention discloses an organic electroluminescent device comprising a first electrode, a second electrode and a layer of or a plurality of layers of organic layers located between the first electrode and the second electrode. The organic layer at least comprises a luminescent layer and an electronic transmission layer; the electronic transmission layer is 5-100 nm in thickness, and the electronic transmission layer contains at least one compound represented by the formula (I), wherein L1 and L2 are independently selected from chemical bonds, C6-C12 arylene or sub-polycyclic aromatic groups, and C3-C12 heteroarylene or sub-polyheterocyclic aromatic groups respectively; R1, R2, R3, R4 and R5 are independently selected from hydrogen, halogen, cyano groups, nitro groups, C1-C10 alkylene, C6-C30 substituted or non-substituted aryl or polycyclic aromatic groups, and C3-C30 substituted or non-substituted heteroaryl or polyheterocyclic aromatic groups respectively, and R2 and R5 can be connected with each other to form a ring structure; Ar1 and Ar2 are independently selected from C6-C30 substituted or non-substituted aryl or polycyclic aromatic groups, and C3-C30 substituted or non-substituted heteroaryl or polyheterocyclic aromatic groups respectively. The organic electroluminescent device has the advantages of low working voltage and high luminescent efficiency.

Description

technical field [0001] The invention belongs to the field of organic electroluminescence, and more specifically, the invention relates to a novel organic electroluminescence device, which adopts a new type of general formula compound. Background technique [0002] Organic electroluminescent display (hereinafter referred to as OLED) has a series of advantages such as self-luminescence, low-voltage DC drive, full curing, wide viewing angle, light weight, simple composition and process, etc. Compared with liquid crystal display, organic electroluminescent display is not It needs a backlight source, has a large viewing angle, low power, and its response speed can reach 1000 times that of a liquid crystal display, but its manufacturing cost is lower than that of a liquid crystal display with the same resolution. Therefore, organic electroluminescent devices have broad application prospects. [0003] With the continuous advancement of OLED technology in the two major fields of lig...

AI Technical Summary

Problems solved by technology

[0006] The performance of the currently known electron transport materials is not ideal, and the industry still urgently needs to develop new electron transport materials

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