Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of synthetic method of thermally activated delayed fluorescent material and its application

A technology of thermally activated delay and fluorescent materials, applied in the direction of luminescent materials, chemical instruments and methods, electrical components, etc.

Active Publication Date: 2017-09-08
NANJING TECH UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still few new materials of this type at present, and researchers need to further develop and research.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of synthetic method of thermally activated delayed fluorescent material and its application
  • A kind of synthetic method of thermally activated delayed fluorescent material and its application
  • A kind of synthetic method of thermally activated delayed fluorescent material and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: 2,3,5, the synthesis of 6-tetracarbazolyl-4-cyanopyridine

[0012] 2,3,5,6-Tetrafluoro-4-cyanopyridine (0.30g, 1.7mmol), potassium carbonate (234g, 17mmol), carbazole (1.42g, 8.5mmol), DMSO 10ml, heated to reflux at 150°C for 12h . Cooled to room temperature and poured into 200ml of water to precipitate a large amount of solid, stirred for 0.5h, filtered with suction to obtain a white solid, and purified by column chromatography to obtain 1.12g of a white solid, with a yield of 86%. 1 HNMR (CDCl 3 , 400MHz): δppm 7.82(t, 4H, J=4.50Hz), 7.75(d, 4H, 7.50Hz), 7.44(d, 4H, J=780), 7.29(d, 4H, 3.9Hz), 7.21- 7.17 (m, 8H), 7.13-7.01 (m, 8H).

[0013]

[0014] Table 1 is the device data of the embodiment (1), and the device structure is: ITO / PEDOT:PSS / mCP or 4CzPy:2,3,5,6-CzCNPy / TMPYPB / LiF / Al. The devices prepared as shown in Table 1 have a maximum current efficiency of 38.9cd / A and a maximum energy efficiency of 17.9m / W.

[0015]

[0016] Table 1

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
current efficiencyaaaaaaaaaa
Login to View More

Abstract

The present invention develops a method for synthesizing cyanopyridine and carbazole compounds by one-step method that is convenient for commercialization, with cheap and easy-to-obtain raw materials, no need to add noble metal catalyst, simple operation, mild reaction conditions, low production cost and high yield. The field of organic electroluminescent materials specifically relates to one-step synthesis of a heat-activated delayed fluorescent material and its use as a light-emitting layer of an OLED device.

Description

technical field [0001] The invention relates to the field of organic electroluminescent materials, in particular to a thermally activated delayed fluorescent material, a one-step synthesis method and an OLED device using the thermally activated delayed fluorescent material. [0002] technical background [0003] Organic light-emitting diodes (OLEDs) have great potential in large-area, high-resolution flat-panel displays. In the past 20 years, fluorescent OLEDs based on singlet light emission as the first generation of light-emitting materials have a theoretical internal quantum efficiency of only 25%. Further improve its efficiency; phosphorescent OLED is called the second generation, and its internal quantum efficiency can reach 100%, but it has the problem of poor stability and short life, and blue phosphorescence is a problem that needs to be solved all the time. In 2009, Professor Adachi of Kyushu University in Japan discovered a thermally activated delayed fluorescence (...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07D401/14C09K11/06H01L51/54
CPCC09K11/06C07D401/14C09K2211/1029H10K85/6572
Inventor 陶友田汤超王芳芳黄维
Owner NANJING TECH UNIV