A kind of organic orange light small molecule based on phenanthroimidazole, its preparation method and its application in electroluminescent devices

An electroluminescent device, phenanthroimidazole technology, applied in the application and preparation of phenanthroimidazole-based organic orange small molecules, electroluminescent devices, can solve the problems of high driving voltage and too thick light-emitting layer

Active Publication Date: 2021-09-14
JILIN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the early light-emitting layer was too thick, resulting in too high driving voltage, which failed to arouse widespread research interest.

Method used

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  • A kind of organic orange light small molecule based on phenanthroimidazole, its preparation method and its application in electroluminescent devices
  • A kind of organic orange light small molecule based on phenanthroimidazole, its preparation method and its application in electroluminescent devices
  • A kind of organic orange light small molecule based on phenanthroimidazole, its preparation method and its application in electroluminescent devices

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Experimental program
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Embodiment 1

[0060] The preparation of the present embodiment PIDSB comprises the following preparation steps:

[0061] Synthesis of PICHO: PICHO was prepared by a one-pot method. In a 250mL round bottom flask, 9,10-phenanthrenequinone (20mmol, 4.16g), terephthalaldehyde (20mmol, 2.68g), aniline (100mmol, 9.5mL), ammonium acetate (80mmol, 6.16g) were dissolved in In 150mL of glacial acetic acid, stirred and refluxed at 120°C for 4 hours under nitrogen protection. After the reaction was completed, the reaction system was poured into 100 mL of ice water, and a large amount of precipitates appeared instantly. After suction filtration, the resulting solid was separated and purified by column chromatography (petroleum ether:dichloromethane=1:2, volume ratio) to obtain a white solid (5.7 g, yield: 72%). Mass Spectrum MALDI-TOF(m / z)[M + ]: The test value is 398.34, and the theoretical value is 398.47.

[0062]

[0063] Synthesis of PIDSB: PIDSB was prepared by a knotevenagel condensation r...

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Abstract

A phenanthroimidazole-based organic orange light small molecule, a preparation method and its application in electroluminescence devices belong to the technical field of organic electroluminescence. The present invention uses phenanthroimidazole as a donor and cyano-substituted p-phenylene vinylene as an acceptor. The phenanthroimidazole-based organic orange light small molecule of the novel D-π-A-π-D structure has very high fluorescence Quantum yield, good thermal stability and chemical stability, the evaporated film is flat and uniform, and can be used as a light-emitting layer in non-doped or doped organic electroluminescent devices (OLEDs). The prepared device has Low driving voltage, high current efficiency and external quantum efficiency and other characteristics, obtain good electroluminescence performance.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescence, and in particular relates to a small organic orange light molecule based on phenanthroimidazole, a preparation method and its application in electroluminescent devices. Background technique [0002] The phenomenon of organic electroluminescence and corresponding research can be traced back to the 1960s. In 1963, Professor Pope of New York University discovered the electroluminescence phenomenon of organic material single crystal anthracene for the first time, and there have been some studies on the electroluminescence phenomenon of single crystals. However, the early light-emitting layer was too thick, resulting in too high driving voltage, which failed to arouse widespread research interest. Since C.W.Tang and other scientists designed and produced organic electroluminescent materials and devices with excellent performance in 1987, the phenomenon of organic electroluminescen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D235/02C09K11/06H01L51/54
CPCC09K11/06C07D235/02C09K2211/1007C09K2211/1044H10K85/6572
Inventor 路萍孙晓艺李金钰
Owner JILIN UNIV
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