Thermally activated delayed fluorescent molecule and preparation method thereof and electro-thermally activated delayed fluorescent device

A technology of thermally activated delayed and fluorescent molecules, which is applied in the chemical field, can solve the problems of limitations and inability to obtain excellent device performance, and achieve the effect of suppressing the reduction of radiative transition rate and high photoluminescence quantum yield

Inactive Publication Date: 2019-10-25
WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a thermally activated delayed fluorescent material and a preparation method thereof, and an electrothermally activated delayed fluorescent device to solve the problem that the thermally activated delayed fluorescent material in the prior art is limited to energy gap rules (Energy gap law) ) so that excellent device performance cannot be obtained

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  • Thermally activated delayed fluorescent molecule and preparation method thereof and electro-thermally activated delayed fluorescent device
  • Thermally activated delayed fluorescent molecule and preparation method thereof and electro-thermally activated delayed fluorescent device
  • Thermally activated delayed fluorescent molecule and preparation method thereof and electro-thermally activated delayed fluorescent device

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Embodiment 1

[0033] In this embodiment, the thermally activated delayed fluorescent molecule of the present invention includes an electron donor D and an electron acceptor A, and the electron acceptor A has a trimeric quinolinone group, wherein the structural composition of the thermally activated delayed fluorescent molecule is D n -A structure, n is a natural number. like figure 1 Shown is the fluorescence emission spectrum of the thermally activated delayed fluorescent molecule in this implementation.

[0034] The electron acceptor A has a trimeric quinolinone group. Since the trimeric quinolinone group has a hydroxyl structure, the thermally activated delayed fluorescent molecule has a super large plane, so that the thermally activated delayed fluorescent molecule has a high The intersystem crossing rate constant and the antiintersystem crossing rate constant can effectively suppress the reduction of the radiative transition rate due to the energy gap rule, thereby obtaining a high ph...

Embodiment 2

[0048] The electrothermally activated delayed fluorescent device of the present invention adopts the thermally activated delayed fluorescent molecular material in Example 1, and the thermally activated delayed fluorescent molecular material is characterized by high efficiency, weak roll-off, and long wavelength. Delayed fluorescence devices have the characteristics of high efficiency, long life, and high precision.

[0049] Specifically, such as figure 2 As shown, in this embodiment, the electrothermally activated delayed fluorescent device 1 includes a substrate 10 , an injection layer 20 , a hole transport layer 30 , a light emitting layer 40 , an electron transport layer 50 , and a cathode layer 60 . Wherein, the substrate 10 is a glass layer provided with a conductive thin film 11 .

[0050] The injection layer 20 is provided on the substrate 10, and its material is 2,3,6,7,10,11-hexacyano-1,4,5,8,9,12-hexaazabenzo Fei.

[0051] The hole transport layer 30 is disposed ...

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Abstract

The invention discloses a thermally activated delayed fluorescent molecule and a preparation method thereof and an electro-thermally activated delayed fluorescent device. The thermally activated delayed fluorescent molecule comprises an electron donor and an electron acceptor, wherein the electron acceptor comprises a tripolyquinolinone group. The thermally activated delayed fluorescent molecule and the preparation method thereof and the electro-thermally activated delayed fluorescent device has the beneficial effects that the thermally activated delayed fluorescent molecule has the tripolyquinolinone group which contains a carbonyl structure, so that the thermally activated delayed fluorescent molecule has a high intersystem crossing rate constant and a high anti-intersystem crossing rateconstant, the decrease of a radiation transition rate due to the energy gap law can be effectively suppressed, and a high photoluminescence quantum yield is obtained.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to a thermally activated delayed fluorescent molecule, a preparation method thereof, and an electrothermally activated delayed fluorescent device. Background technique [0002] Organic light-emitting diodes (organic lighting-emitting diodes, OLEDs), due to active light emission, large viewing angle, fast response speed, wide temperature range, low driving voltage, low power consumption, high brightness, simple production process, light and thin, and can The advantages of flexible display have shown great application prospects in the fields of OLED display and lighting, attracting the attention of researchers and companies. At present, Samsung and LG have realized the application of OLEDs in mobile phones. In OLED, the pros and cons of the light-emitting layer material will play a decisive role in whether the OLED can be industrialized. The usual light-emitting layer material consists of h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D471/14C09K11/06H01L51/50H01L51/54
CPCC07D471/14C09K11/06C09K2211/1014C09K2211/1029H10K85/6572H10K50/11
Inventor 王彦杰
Owner WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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