Composition and organic electroluminescent element comprising the composition

Abstract

The invention belongs to the field of organic photoelectricity, specifically relates to a composition comprising an iridium metal complex and an organic compound, and simultaneously describes an organic electroluminescent element using the composition as an organic functional layer. Wherein the structure of the organic compound is shown in the formula (I), and the structural formula (II) of the iridium metal complex is shown in: the difference ΔST between the singlet energy level S1 and the triplet energy level T1 of the compound represented by the organic compound formula (I) < 0.35 electron volts; and the iridium metal complex formula (II) and organic optoelectronic elements comprising them can be understood by referring to the specific description provided herein. The composition of the invention is applied to the light-emitting layer of the organic electroluminescent diode, so that the current efficiency of the light-emitting element is improved, the driving voltage is obviously reduced, the service life is prolonged, and it has good commercialization prospects.

Description

technical field [0001] The invention belongs to the field of organic electroluminescence, and particularly relates to a composition of an iridium metal complex and an organic compound, and an organic electroluminescence element comprising the composition. Background technique [0002] As a new type of display technology, organic electroluminescence elements have the advantages of self-luminescence, wide viewing angle, low energy consumption, high efficiency, thinness, rich colors, fast response speed, wide application temperature range, low driving voltage, flexible, bendable and The unique advantages of transparent display panels and environmental friendliness can be applied to flat panel displays and next-generation lighting, and can also be used as backlights for LCDs. [0003] Since its invention in the late 1980s, organic electroluminescent devices have been applied in industry, such as display screens such as mobile phones. However, the current OLED devices are limited...

AI Technical Summary

Problems solved by technology

[0003] Since its invention at the end of the 1980s, organic electroluminescent devices have been used in industries, such as display screens such as mobile phones, but the current OLED devices are restricted from wider application due to factors such as low efficiency and short service life, especially large screen display

At the same time, when the OLED device is operated with an applied voltage, it will generate Joule heat, which makes the organic material easy to crystallize and affects the life and efficiency of the device. Therefore, it is also necessary to develop stable and efficient organic electroluminescent materials.

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