Organic light-emitting material in thiazole oxide derivative structure and organic light-emitting device prepared from organic light-emitting material

Abstract

The invention discloses an organic light-emitting material in a thiazole oxide derivative structure and an organic light-emitting device prepared from the organic light-emitting material, belonging to the technical field of organic photoelectric materials. The organic light-emitting material provided by the invention utilizes thiazole oxide as a main body structure, and ligand groups with different polarities are linked, so that the molecular weight, pi conjugacy, eletrophilicity, cavity and load transmittability of the material can be adjusted, the organic light-emitting material in the thiazole oxide derivative structure with high light-emitting performance, electronic transmission performance, membrane stability, thermal stability and triplet energy level is obtained, and the problem of imbalanced current carriers of unipolar light-emitting materials can be effectively solved. The light-emitting efficiency of the organic light-emitting device prepared by virtue of the organic light-emitting material in the thiazole oxide derivative structure is improved, the light color is relatively stable, and the organic light-emitting device has the properties of excellent electron chemistry stability, heat stability and service life and further has high light-emitting efficiency under a low starting voltage.

Description

technical field [0001] The invention relates to the technical field of organic photoelectric materials, in particular to an organic luminescent material with a thiazole oxide derivative structure and an organic luminescent device thereof. Background technique [0002] Organic light-emitting devices are a new type of flat-panel display devices, with all solid-state, self-luminous, high brightness, high resolution, wide viewing angle (above 170 degrees), fast response, thin thickness, small size, light weight, and flexible Substrate, low voltage DC drive (3-10V), low power consumption, wide operating temperature range and many other advantages, its application market is very wide, such as lighting system, communication system, vehicle display, portable electronic equipment, high-definition display and even military field. [0003] In current OLED applications, organic electroluminescent diodes generally adopt a sandwich structure, which consists of a cathode, an anode, and an...

AI Technical Summary

Problems solved by technology

In practical applications, since the hole transport performance is better than that of electrons in organic photoelectric materials, the mobility of electrons is slower than that of holes, and the recombination region of holes and electrons in the light-emitting layer will be selectively biased to one side, resulting in its luminous efficiency. The change of light color can even cause energy quenching between triplet states seriously, resulting in serious efficiency roll-off under high brightness. Therefore, how to solve the problem of increasing luminous efficiency and device life becomes the key to the development of OLEDs, which requires The combination of holes and electrons in the light-emitting layer is efficient, and it is necessary to use effective electron transport materials. From the cathode to the light-emitting layer, the transport material of each layer needs to improve its electron injection and migration, and at the same time cut off part of the hole movement, so as to meet the requirements of organic materials. Light-emitting devices have requirements for low driving voltage, high luminous efficiency and good thermal stability

Images