Host-guest composition and organic electroluminescent element comprising same

A composition, host-guest technology, applied in electrical components, luminescent materials, electrical solid devices and other directions, can solve the problems of organic materials prone to crystallization, affecting device life and efficiency, and short service life, and achieves extended operating life, good performance. The effect of thermal stability and current efficiency improvement

Active Publication Date: 2021-09-21
SHANGHAI UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 scree

Method used

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  • Host-guest composition and organic electroluminescent element comprising same
  • Host-guest composition and organic electroluminescent element comprising same
  • Host-guest composition and organic electroluminescent element comprising same

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Embodiment Construction

[0091] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, 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 contains one or more p-type dopants. Preferred p-type dopant is the following structure, but it does not mean that the present invention is limited to the following structure:

[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 structures, but does ...

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Abstract

The invention belongs to the field of organic photoelectricity, particularly relates to a host-guest composition which comprises an iridium metal complex and an organic compound, and also describes an organic electroluminescent element using the composition as an organic functional layer. The structure of the organic compound is shown as a formula (I), and the structure of the iridium metal complex is shown as a formula (II); the difference value delta ST between the singlet state energy level S1 and the triplet state energy level T1 of the compound shown as the formula (I) of the organic compound is less than or equal to 0.35 electron volt; iridium metal complexes of Formula (II) and organic optoelectronic elements comprising them can be understood by referring to the specific description provided herein. The host-guest composition disclosed by the invention is applied to a light-emitting layer of an organic light-emitting diode, so that the current efficiency of a light-emitting element is improved, the driving voltage is obviously reduced, the service life is prolonged, and the host-guest composition has a good commercial prospect.

Description

technical field [0001] The invention belongs to the field of organic electroluminescence, and in particular relates 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 electroluminescent elements have self-illumination, wide viewing angle, low energy consumption, high efficiency, thinness, rich colors, fast response, wide applicable 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 new generation lighting, and can also be used as LCD backlight. [0003] Since its invention in the late 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 ...

Claims

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Application Information

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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
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