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Preparation method of composite blue-light emitting materials displayed by OLED, and application of the composite blue-light emitting materials

A blue-light material and uniform mixing technology, which is applied in the field of preparation of composite blue-light materials, can solve problems such as difficult industrial production, poor voltage stability and thermal stability, and low luminous efficiency, so as to improve service life and film formation uniformity , the effect of significant market application value

Active Publication Date: 2017-06-20
中山市海家菱家居饰品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the current disadvantages of various luminescent materials such as poor voltage stability and thermal stability, low luminous efficiency, and difficulty in realizing industrialized production, the present invention proposes a method for preparing a composite blue light material for OLED display, which is characterized in that the blue light material is Base, freeze-grind with poly(p-phenylene vinylene) and polyfluorene, and then disperse in liquid polypyrrole to obtain a composite blue light material for OLED display, which has good voltage stability, thermal stability, and high luminous efficiency , which is beneficial to the structure of OLED devices, and can prolong the service life, and the process is relatively simple, which is conducive to pilot test and industrial scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Mix N-arylbenzimidazoles, 1,2,4-triazole derivatives, and 1,3-4-oxadiazole derivatives in a mass ratio of 1:0.5:0.5 to form the basic blue light material, Then mix the basic blue light material, poly(p-phenylene vinylene) organic matter, and polyfluorene organic matter at a mass ratio of 1:0.2):0.05, and add it to the vertical mill at a temperature of -20°C and a speed of 100r / min After fully mixing and grinding for 1 hour, the material is discharged;

[0027] (2) Mix the grinding material obtained in step (1) with liquid polypyrrole and dispersant sodium tripolyphosphate at a mass ratio of 1:30):0.2, disperse in the reactor by ultrasonic for 1 hour, and add the dispersion material with a volume of 0.05 % of the initiator azobisisobutyronitrile is mixed evenly to obtain a liquid composite blue light material.

[0028] Print the liquid composite blue light material on the hole transport layer and heat it with microwaves for 1-2s to form a light-emitting layer with a...

Embodiment 2

[0030] (1) Mix the basic blue light material N-arylbenzimidazoles, poly(p-phenylene vinylene) organic matter, and polyfluorene organic matter at a mass ratio of 1:0.5:0.05, and add it to a low-temperature Raymond mill. °C temperature, 200r / min rotation speed, fully mixed and ground for 2 hours before discharging;

[0031] (2) Mix the grinding material obtained in step (1) with liquid polypyrrole and sodium hexametaphosphate as a dispersant at a mass ratio of 1:20:0.5, disperse in the reactor by ultrasonic for 3 hours, and add 0.08% of the volume of the dispersed material The initiator diacyl peroxide is mixed evenly to obtain a liquid composite blue light material.

[0032] The liquid composite blue-light material was printed on the hole transport layer and heated by microwave for 2s to form an ultra-thin light-emitting layer with a thickness of 30nm. The assembled OLED device exhibited a brightness of 980cd / m at a driving voltage of 4.7V 2 , the luminous efficiency reaches 68%...

Embodiment 3

[0034] (1) Mix the 1,3-4-oxadiazole derivatives, the basic blue light material composed of bistilbene organic substances, polyparaphenylene vinylene organic substances, and polyfluorene organic substances at a mass ratio of 1:0.3:0.1, Add it to a low-temperature star disc mill, fully mix and grind it for 2 hours at a temperature of -20°C and a speed of 100r / min, and then discharge;

[0035] (2) Mix the grinding material obtained in step (1) with liquid polypyrrole and sodium tripolyphosphate as a dispersant at a mass ratio of 1:25:0.3, disperse in the reactor by ultrasonic for 2 hours, and add 0.06% of the volume of the dispersed material The initiator persulfate is mixed evenly to obtain a liquid composite blue light material.

[0036] The liquid composite blue light material was printed on the hole transport layer and heated by microwave for 3s to form a light-emitting layer with a thickness of 35nm. The assembled OLED device exhibited a brightness of 800cd / m at a driving vo...

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Abstract

The invention belongs to the field of blue-light emitting materials, and specifically relates to a preparation method of composite blue-light emitting materials displayed by OLED, and an application of the composite blue-light emitting materials. The preparation method of composite blue-light emitting materials displayed by OLED is characterized by taking blue-light emitting materials as the base, refrigeration-rubbing poly-phenylene vinylene organic matter and polyfluorene organic matter together with the blue-light emitting materials, and dispersing the refrigeration-rubbing poly-phenylene vinylene organic matter, the polyfluorene organic matter and the blue-light emitting materials in liquid-state polypyrrole, thus greatly improving the voltage stability, the heat stability, the luminous efficiency and the service life of the composite blue-light emitting materials obtained through refrigeration-rubbing composition. The application method of the composite blue-light emitting materials prepared through the above method is characterized by roller coating, rotation coating and printing the liquid-state composite blue-light emitting materials on a substrate to form a coating layer, and utilizing instantaneous heat rapid polymerization of microwave to form a stable luminous thin film layer on the substrate, thus greatly improving film forming uniformity, high effectiveness, ultrathin property and compactness of the luminous thin film layer, and greatly improving the service life of the device.

Description

technical field [0001] The invention belongs to the field of blue light materials, in particular to a preparation method and application of a composite blue light material used for OLED display. Background technique [0002] With the development of electronic information technology, more and more work needs to be completed by electronic terminals. Therefore, display technology is very important. At present, most of the monitors use TFT-LCD. If you want to make it light, thin, and easy to carry around, the amount of information displayed on the screen is not enough; Too much electricity. For future displays, consumers hope that they can display a large amount of information, be convenient to store, and have low power consumption, unbreakable, bendable, foldable or easy to roll up products. Therefore, the visible flexible panel made of organic light-emitting diode (OLED) plays an important role. It is not only made into a flexible display panel that can be bent and rolled u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/54H01L51/56
CPCH10K85/00H10K85/111H10K50/11H10K71/00
Inventor 陈庆曾军堂王镭迪
Owner 中山市海家菱家居饰品有限公司
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