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Lithium formate metal complex, production method thereof and organic electroluminescence device

The invention relates to a metal complex and a production method technology, which are applied in the field of organic electroluminescent devices, and can solve the problems of affecting the electron injection capability of an electron injection layer, improving the accuracy requirements of evaporation equipment, and reducing the comprehensive performance of light-emitting devices, so as to improve the electron injection capability. ability, improving the luminous quantum efficiency, and the effect of improving the efficiency

Inactive Publication Date: 2014-12-24
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This increases the precision requirements of the evaporation equipment, which leads to an increase in the manufacturing cost of the evaporation equipment; and the current evaporation process is difficult to control the thickness of the electron injection layer at about 0.5nm, and the thickness of the electron injection layer is usually about 1nm. This will affect the electron injection ability of the electron injection layer, resulting in a decrease in the overall performance of the organic electroluminescent device

Method used

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  • Lithium formate metal complex, production method thereof and organic electroluminescence device
  • Lithium formate metal complex, production method thereof and organic electroluminescence device
  • Lithium formate metal complex, production method thereof and organic electroluminescence device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] Lithium metal complex of 4-methylfuroate

[0098] a. Dissolve 1 mole of 2-methylfuran in nitrobenzene organic solvent, ice bath, slowly add 1 mole of anhydrous AlCl under stirring 3 and 1 mole of CH 3 Cl.

[0099] b. Heat the nitrobenzene organic solvent to 50°C to make 2-methylfuran and CH 3 Cl was reacted for 10 hours.

[0100] c. Add hydrochloric acid and ice-water mixture to the reacted nitrobenzene organic solvent to make AlCl 3 The intermediate product generated in the catalytic process is acidolytically reduced to AlCl 3 .

[0101] d. Distillation under reduced pressure to obtain 2,4-dimethylfuran.

[0102] e. Dissolve the 2,4-dimethylfuran obtained in step d in an aqueous solution of ethanol, and then add 0.01 moles of KMnO 4 , so that KMnO 4 Reaction with 2,4-dimethylfuran in ethanol for 1 hour gives 4-methylfurancarboxylic acid.

[0103] f. Add excess metal lithium in 4-methylfuranic acid solution, reflux for 3 hours under anhydrous and oxygen-free co...

Embodiment 2

[0106] Lithium metal complex of 3-cyanothiophenecarboxylate

[0107] a. Dissolve 1 mole of 2-methylthiophene in tetrahydrofuran organic solvent, ice bath, slowly add 1.1 moles of anhydrous AlCl under stirring 3 and 1.1 moles of CNCl.

[0108] b. Heat the tetrahydrofuran organic solvent to 60° C. to react 2-methylthiophene with CNCl for 11 hours.

[0109] c. Add hydrochloric acid and ice-water mixture to the tetrahydrofuran organic solvent that reacts, make AlCl 3 The intermediate product generated in the catalytic process is acidolytically reduced to AlCl 3 .

[0110] d. Distillation under reduced pressure to obtain 2-methyl-3-cyanothiophene.

[0111] e. Dissolve the 2-methyl-3-cyanothiophene obtained in step d in an aqueous solution of ethanol, and then add 0.011 moles of KMnO 4 , so that KMnO 4 React with 2-methyl-3-cyanothiophene in ethanol for 1.5 hours to obtain 3-cyanothiophenecarboxylic acid.

[0112] f. Add excess metal lithium in 3-cyanothiophenecarboxylic acid...

Embodiment 3

[0115] Lithium metal complex of 4-trifluoromethylfuroate

[0116] a. Dissolve 1 mole of 2-methylfuran in dichloromethane organic solvent, ice bath, slowly add 1.2 moles of anhydrous AlCl under stirring 3 and 1.2 molar CF 3 Cl.

[0117] b. Heat the dichloromethane organic solvent to 70°C to make 2-methylfuran and CF 3 Cl was reacted for 12 hours.

[0118] c. Add hydrochloric acid and ice-water mixture to the dichloromethane organic solvent that reacts, so that AlCl 3 The intermediate product generated in the catalytic process is acidolytically reduced to AlCl 3 .

[0119] d. Distillation under reduced pressure to obtain 2-methyl-4-trifluoromethylfuran.

[0120] e. Dissolve the 2-methyl-4-trifluoromethylfuran obtained in step d in an aqueous solution of ethanol, and then add 0.012 moles of KMnO 4 , so that KMnO 4 Reaction with 2-methyl-4-trifluoromethylfuran in ethanol for 3 hours gave 4-trifluoromethylfurancarboxylic acid.

[0121] f. Add excess metal lithium to the 4-...

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Abstract

The invention provides a lithium formate metal complex, a production method thereof and an organic electroluminescence device. The lithium formate metal complex is a metal complex with a formula (1), wherein X represents oxygen atom or sulfur atom and R represents hydrogen or substituent group. According to the lithium formate metal complex, the electron injection capacity of an electron injection layer can be improved and a hole can be effectively prevented from being diffused to a cathode, and thus the brightness, the current density and the efficiency under high current density of the organic electroluminescence device can be respectively improved by 20-30 percent and further the comprehensive performance of the organic electroluminescence device is greatly improved.

Description

technical field [0001] The invention relates to the field of organic electroluminescence, in particular to a lithium formate metal complex and a preparation method thereof, and an organic electroluminescence device made of the lithium formate metal complex. Background technique [0002] With the rapid development of multimedia technology, plasma displays, field emission displays and organic electroluminescent displays (OLEDs) gradually appear in the flat panel display field. Among them, the organic electroluminescent display not only has the advantages of self-luminescence, low-voltage DC drive, full curing, wide viewing angle, rich colors, etc., so it has a wide application prospect in the field of flat panel display. [0003] Organic electroluminescent devices are spontaneous light-emitting devices, and their light-emitting mechanism is that electrons and holes injected into organic materials emit light during the process of migration, recombination and decay under the act...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F1/02H01L51/50H01L51/54
Inventor 李娜朴炯俊肖田金馝奭
Owner BOE TECH GRP CO LTD
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