Red light thermally activated delayed fluorescent material and its synthesis method, display panel

A technology of thermally activated delayed and fluorescent materials, applied in luminescent materials, chemical instruments and methods, silicon organic compounds, etc., can solve problems such as lack of resources, achieve high luminous efficiency, large space ratio, and improve the effect of luminescent materials
CN110526934BActive Publication Date: 2021-11-23WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
Publication Date
2021-11-23

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Abstract

The invention provides a red light thermally activated delayed fluorescent material and its synthesis method, and a display panel. The red light thermally activated delayed fluorescent material is a molecule combined with a carborane structure and an electron-donating unit; The surface cage structure has a large space ratio and has an electron-withdrawing effect, so that the highest occupied molecular orbital and the lowest unoccupied molecular orbital of the red-light thermally activated delayed fluorescent material molecules can overlap less, so that the energy between single triplet states The level is small, so that the red thermally activated delayed fluorescent material has a fast reverse intersystem crossing constant and high luminous efficiency; at the same time, by combining the electron-donating unit, the steric effect and electronic effect of the electron-donating unit can be used to Adjusting the single triplet energy level difference of the red-light thermally activated delayed fluorescent material, thereby adjusting the luminous efficiency of the material; applying the red-light thermally activated delayed fluorescent material to an OLED display panel, so that the OLED display panel has a higher luminous efficiency .
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Description

technical field

[0001] The invention relates to the field of display, in particular to a red light thermally activated delayed fluorescent material, a synthesis method thereof, and a display panel. Background technique

[0002] Organic light-emitting diodes (organic light-emitting diodes, OLEDs) have attracted many researches due to their advantages such as active light emission, large viewing angle, fast response speed, low driving voltage, low energy consumption, flexible display and huge application prospects. attention. In OLEDs, the dominant light-emitting guest material is crucial.

[0003] Fluorescent materials, since the ratio of singlet and triplet excitons in OLEDs is 1:3, the theoretical internal quantum efficiency of OLEDs based on fluorescent materials can only reach 25%. For heavy metal complex phosphorescent materials, the heavy metals usually used are precious metals such as Ir and Pt, and the resources are scarce.

[0004] Therefore, the luminescent guest...

Claims

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