Aromatic amine derivatives and organic electroluminescent device using same

a technology of organic electroluminescence and amine derivatives, which is applied in the direction of discharge tube/lamp details, luminescent screen of discharge tube, organic chemistry, etc., can solve the problems of reducing a current efficiency, affecting and affecting the operation voltage, so as to improve the yield of organic el devices and prolong the life. , the effect of less liabl

Inactive Publication Date: 2008-05-08
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0015] The aromatic amine derivative of the present invention and the organic EL device obtained by using the same are reduced in an operat

Problems solved by technology

Usually, when an organic EL device is operated or stored under high temperature environment, brought about are adverse effects such as a change in a color of emitted light, a reduction in a current efficiency, a rise in an operating voltage and a reduction in an emission lifetime.
However, if they have a lot of aromatic groups in a molecule, crystallization is liable to be caused in forming a thin film using the above hole transporting materials to produce an organic EL device, and the problems that an outlet of a crucible used for vapor deposition is clogged and that defects of a thin film originating in crystallization are caused to bring about a reduction in a yield of an organic EL device have been brought about.
Further, compounds having more aromatic groups in a molecule have usually a higher glass transition temperature (Tg) but have a higher sublimation temperature, and it is considered that the phen

Method used

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  • Aromatic amine derivatives and organic electroluminescent device using same
  • Aromatic amine derivatives and organic electroluminescent device using same
  • Aromatic amine derivatives and organic electroluminescent device using same

Examples

Experimental program
Comparison scheme
Effect test

synthetic example 1

Synthesis of Intermediate 1

[0177] A three neck flask of 1000 ml was charged with 47 g of 4-bromobiphenyl, 23 g of iodine, 9.4 g of periodic acid dihydrate, 42 ml of water, 360 mL of acetic acid and 11 mL of sulfuric acid under argon flow, and the mixture was stirred at 65° C. for 30 minutes and then reacted at 90° C. for 6 hours. The reaction product was poured into ice and water and filtered. The filtered matter was washed with water and then with methanol, whereby 67 g of a white powder was obtained. The principal peak of m / z=358 and 360 versus C12H15BrI=359 was obtained by analysis of FD-MS, and therefore it was identified as Intermediate 1.

synthetic example 2

Synthesis of Intermediate 2

[0178] A three neck flask of 300 ml was charged with 10 g of p-terphenyl, 12 g of iodine, 4.9 g of periodic acid dihydrate, 20 mL of water, 170 mL of acetic acid and 22 mL of sulfuric acid under argon flow, and the mixture was stirred at 65° C. for 30 minutes and then reacted at 90° C. for 6 hours. The reaction product was poured into ice and water and filtered. The filtered matter was washed with water and then with methanol, whereby 18 g of a white powder was obtained. The principal peak of m / z=482 versus C18H12I2=482 was obtained by analysis of FD-MS, and therefore it was identified as Intermediate 2.

synthetic example 3

Synthesis of Intermediate 3

[0179] A reaction vessel of 20 L was charged with 441 g of thianaphthene-2-boronic acid, 600 g of 4-iodobromobenzene, 41 g of tetrakis(triphenylphosphine)palladium (Pd(PPh3)4), 2.6 L of 2M solution of sodium carbonate (Na2CO3) and 10 L of dimethoxyethane under argon flow, and then they were reacted at 80° C. for 8 hours. The reaction solution was extracted with toluene / water, and the extract was dried on anhydrous sodium sulfate. This was concentrated under reduced pressure, and a crude product obtained was refined through a column, whereby 241 g of a white powder was obtained. It was identified as Intermediate 3 by analysis of FD-MS.

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Abstract

The present invention provides a novel aromatic amine derivative having a specific structure and an organic electroluminescence device in which an organic thin film layer comprising a single layer or plural layers including at least a light emitting layer is interposed between a cathode and an anode, wherein at least one layer in the above organic thin film layer, particularly a hole transporting layer contains the aromatic amine derivative described above in the form of a single component or a mixed component. Use of the aromatic amine derivative described above materialize an organic electroluminescence device which reduces a driving voltage and makes molecules less liable to be crystallized and which enhances a yield in producing the organic EL device and has a long lifetime.

Description

BACKGROUND OF THE INVENTION [0001] The present invention relates to an aromatic amine derivative and an organic electroluminescence (EL) device using the same, specifically to an aromatic amine derivative which reduces the operating voltage and inhibits the molecules from being crystallized by using an aromatic amine derivative having a specific substituent for a hole transporting material and which enhances a yield in producing an organic EL device and improves a lifetime of the organic EL device. RELATED ART [0002] An organic EL device is a spontaneous light emitting device making use of the principle that a fluorescent substance emits light by recombination energy of holes injected from an anode and electrons injected from a cathode by applying an electric field. Since an organic EL device of a laminate type driven at a low voltage was reported by C. W. Tang et al. of Eastman Kodak Company (C. W. Tang and S. A. Vanslyke, Applied Physics Letters, Vol. 51, p. 913, 1987 and the like...

Claims

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Application Information

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IPC IPC(8): H01L51/54C07D333/52
CPCC07D333/58C09K11/06C09K2211/1007C09K2211/1011C09K2211/1014H01L51/50H01L51/006H01L51/0061H01L51/0074H01L51/5048H05B33/14C09K2211/1092H10K85/636H10K85/633H10K85/6576H10K50/14H10K85/631H10K50/00
Inventor YABUNOUCHI, NOBUHIROKAWAMURA, MASAHIROKAWAMURA, HISAYUKI
Owner IDEMITSU KOSAN CO LTD
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