A host-guest composition and an organic electroluminescent element comprising the composition
A composition, host-guest technology, applied in the direction of electrical components, luminescent materials, electric solid devices, etc., can solve the problems that affect the life and efficiency of devices, easy crystallization of organic materials, short service life, etc., to achieve extended operating life, start-up The effect of reduced brightness voltage and good thermal stability
Active Publication Date: 2022-08-02
SHANGHAI UNIV +1
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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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[0091] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0092] In a preferred embodiment of the present invention, the hole injection layer contained in the OLED device of the present invention comprises one or more p-type dopants. Preferred p-type dopants have the following structures, but do not represent that the present invention is limited to the following structures:
[0093]
[0094] In a preferred embodiment of the present invention, the OLED device of the present invention contains a hole transport layer, and the hole transport material can be preferably selected from known or unknown materials, particularly preferably selected from the following struct...
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Abstract
The invention belongs to the field of organic optoelectronics, and in particular relates to a host-guest composition comprising an iridium metal complex and an organic compound, and describes an organic electroluminescence element using the composition as an organic functional layer. The structure of the organic compound is shown in formula (I), and the structure of the iridium metal complex is shown in formula (II): The difference between the singlet energy level S1 and the triplet energy level T1 of the compound represented by the organic compound formula (I) ΔST ≤ 0.35 eV; iridium metal complexes of formula (II) and organic optoelectronic elements comprising them can be understood by reference to the specific description provided herein. The host-guest composition of the present 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, and the service life is prolonged, and has a good commercialization prospect.
Description
technical field [0001] The invention belongs to the field of organic electroluminescence, in particular to a host-guest 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...
Claims
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IPC IPC(8): C09K11/06H01L51/50H01L51/54
CPCC09K11/06C09K2211/1007C09K2211/1011C09K2211/1029C09K2211/1033C09K2211/1044C09K2211/1059C09K2211/1088C09K2211/1092C09K2211/1096C09K2211/185H10K85/622H10K85/623H10K85/626H10K85/615H10K85/6576H10K85/6574H10K85/657H10K85/342H10K85/40H10K85/6572H10K50/14H10K50/15H10K50/16H10K50/17H10K50/18H10K50/11
Inventor 王子兴张震夏蓉蓉吴空物
Owner SHANGHAI UNIV