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A phosphorescent material and a preparing method thereof

A phosphorescent material and a single technology, applied in the field of phosphorescent materials, can solve problems such as few organic phosphorescent materials and difficult preparation schemes

Active Publication Date: 2018-03-13
THE HONG KONG UNIV OF SCI & TECH
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Problems solved by technology

Despite exciting results, only a few highly efficient and long-lived organic phosphorescent materials have been developed
Due to the lack of a comprehensive investigation of the relationship between molecular structure and properties, further exploration of the preparation scheme of organic phosphorescent materials is difficult.

Method used

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  • A phosphorescent material and a preparing method thereof
  • A phosphorescent material and a preparing method thereof
  • A phosphorescent material and a preparing method thereof

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Embodiment Construction

[0065] Long-lived pure organic RTP materials (τ P ~s) requires its first excited triplet state T 1 Has a slow decay process. due to from 3 (π,π * ) structure to 1 π 2 The forbidden transition of the structure, therefore, has 3 (π,π * ) structure of the first excited triplet state T 1 Has a very small decay rate (~10 0 the s 1 ). then, 3 (π,π * ) structure to obtain the long-lived first excited triplet state T 1 key. We extract the following rules for the structural requirements of purely organic long-lived and efficient RTP materials without heavy atoms: n-orbitals exist; 3 (π,π * ) structure of the first excited triplet state T 1 . Following this molecular design rule, first we choose the carbonyl group (C=O) to provide the n orbital to open the first excited singlet state S 1 to the nth excited triplet state T n The intersystem crossing (ISC) process. We then attach variable conjugation subunits on the carbonyl (C=O) to introduce π orbitals to slow down t...

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Abstract

A phosphorescent material and a preparing method thereof are provided. The phosphorescent material includes a group having an n orbit and a pi-extending subunit connected to the group. The group having an n orbit is carbonyl, and the pi-extending subunit is an aromatic group. Through adjusting an aromatic monomer in aryl ketone, molecular orbital characteristics and energy levels of excited statesare adjusted. A series of full-color pure organic phosphors are obtained through comprehensive theoretical design and experiments, and are ingenious in design and high in practicability.

Description

technical field [0001] The invention relates to the field of phosphorescent materials, in particular to a phosphorescent material and a preparation method thereof. Background technique [0002] Phosphorescent materials have always attracted the attention of scientists and engineers for their potential applications in electronics, optics and biology. So far, most phosphorescent materials are inorganic compounds and organometallic compounds, which have poor stability, high cost and rigidity, brittleness, difficulty in large-area processing, and limited application range. On the other hand, organic phosphorescent materials have the advantages of various types, good biocompatibility, good stability, and good processability. However, they phosphoresce only at low temperatures and in the absence of oxygen due to the high sensitivity and long lifetime of their excited triplet states. [0003] In 2010, we discovered that crystallization of benzophenone and its derivatives at room ...

Claims

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Application Information

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IPC IPC(8): C07D333/76C07C49/813C07F9/54C09K11/06
CPCC07C49/813C07D333/76C07F9/5442C09K11/06C09K2211/1007C09K2211/1014
Inventor 唐本忠赵伟军何自开梁力政帕维杰阿拉姆
Owner THE HONG KONG UNIV OF SCI & TECH
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