Blue light tadf material and its preparation method and electroluminescent device

An electroluminescent device, blue light technology, applied in the direction of luminescent materials, electro-solid devices, electrical components, etc., can solve the problems of limiting the application of TADF materials, low material utilization, high energy requirements, and achieve remarkable TADF characteristics and luminous efficiency. The effect of high and low production cost

Active Publication Date: 2020-06-02
WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At present, TADF materials that meet the above conditions are still relatively scarce compared with heavy metal Ir complexes. In the field of blue light where phosphorescent heavy metal materials need to be broken through, there are very few TADF materials. At the same time, most TADF materials are obtained through It is processed by vacuum evaporation, which is complex, requires high energy, and has low material utilization, which greatly limits the application of TADF materials.

Method used

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  • Blue light tadf material and its preparation method and electroluminescent device
  • Blue light tadf material and its preparation method and electroluminescent device
  • Blue light tadf material and its preparation method and electroluminescent device

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Embodiment Construction

[0048] In order to further illustrate the technical means adopted by the present invention and its effects, the following describes in detail in conjunction with preferred embodiments of the present invention and accompanying drawings.

[0049] The present invention firstly provides a kind of blue light TADF material, and its general structural formula is as shown in Formula 1:

[0050]

[0051] Among them, R 1 Be one of the structures shown in formula 2 to formula 14:

[0052]

[0053]

[0054] R 2 Be one of the structures shown in formula 15 to formula 19:

[0055]

[0056] Preferably, in the first to third embodiments of the present invention, the blue light TADF material has structures shown in Formula 20 to Formula 22 respectively:

[0057]

[0058]

[0059] It should be noted that the above-mentioned blue light TADF material is connected with an alkyl chain that can increase solubility at the periphery, and a tert-butyl carbazole unit with a high ene...

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Abstract

The invention provides a blue light TADF material, a preparation method thereof and an electroluminescent device. The blue light TADF material connects an alkyl chain that can increase solubility on the periphery, and connects a tert-butyl carbazole unit with a high energy level at the end of the alkyl chain. While obtaining high luminous efficiency and TADF efficiency, it also realizes the material Good solubility enables the material to be processed by solution spin coating, and the carbazole at the end can act as a host, enabling the non-doping of the light-emitting layer while effectively avoiding phase separation.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a blue light TADF material, a preparation method thereof and an electroluminescent device. Background technique [0002] Organic light-emitting diodes (organic light-emitting diodes, OLED) display device does not need a backlight source for its active light emission, high luminous efficiency, large viewing angle, fast response speed, wide temperature range, relatively simple production and processing technology, and easy to drive. The advantages of low voltage, low energy consumption, lighter and thinner, flexible display and huge application prospects have attracted the attention of many researchers. [0003] Existing OLED display devices generally include: a substrate, an anode disposed on the substrate, an organic light-emitting layer disposed on the anode, an electron transport layer disposed on the organic light-emitting layer, and a cathode disposed on the electron transpo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D401/14C07F7/08C09K11/06H01L51/54H01L51/56
CPCC09K11/06C07D401/14C07F7/0816C09K2211/1029C09K2211/104H10K71/12H10K85/40H10K85/6572
Inventor 罗佳佳
Owner WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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