Bipolar small-molecular luminescent material based on heteroaromatic ring-fused-3-S,S-dioxodibenzothiophene unit, and preparation method and application thereof

A technology of dioxydibenzothiophene and light-emitting materials, which is applied in the directions of light-emitting materials, electrical components, chemical instruments and methods, etc., achieves the effects of simple preparation process, improved material device efficiency, and good electron and hole transport performance.
CN106916163AInactive Publication Date: 2017-07-04SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2017-07-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a bipolar small-molecular luminescent material based on a heteroaromatic ring-fused-3-S,S-dioxodibenzothiophene unit, and a preparation method and an application thereof. Through a Suzuki coupling reaction, electron donor units are connected to two sides of the heteroaromatic ring-fused-3-S,S-dioxodibenzothiophene unit to prepare the luminescent material. The bipolar small-molecular luminescent material has good solubility, film-forming property and thin film morphological stability and also has excellent electron and hole transport performances, so that the material can balance injection and transportation of carriers, more electrons and holes are effectively compounded to generate excitons, and a mixing phenomenon with the transportation layer interface between the electrons and the holes, thereby improving luminescent efficiency of a device. A luminous layer, based on the material, is free of annealing treatment during preparation of electroluminescent devices, so that the production process is simple.
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Description

technical field

[0001] The invention belongs to the technical field of organic optoelectronics, and specifically relates to a bipolar small-molecule luminescent material based on an aromatic heterocycle-3-S,S-dioxodibenzothiophene unit and a preparation method and application thereof. Background technique

[0002] Organic light-emitting diodes (OLEDs) have attracted widespread attention due to their high efficiency, low-voltage drive, and ease of large-area fabrication. The research on OLED began in the 1950s, and until 1987, Dr. Deng Qingyun of Kodak Company of the United States developed an OLED device with a sandwich device structure. The luminous brightness of the OLED device can reach 1000cd m under the drive of 10V DC voltage. -2 , so that OLED has achieved an epoch-making development.

[0003] The OLED device consists of a cathode, an anode, and an organic layer in the middle. The organic layer generally includes an electron transport layer, a light-emitting layer, a...

Claims

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