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Composition, film manufacturing method, as well as functional device and manufacturing method therefor

a technology of functional devices and films, applied in non-linear optics, instruments, inks, etc., can solve the problems of limiting the materials used in compositions (dispensing compositions), high cost and complicated processes, and functional materials that either react with water and alcohol, or are decomposed by alcohol,

Inactive Publication Date: 2005-07-21
CAMBRIDGE DISPLAY TECH LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a composition that includes a functional material and a solvent made up of at least one benzene derivative with substituents that have three or more carbon atoms. The invention also provides a method for making a film using this composition and a functional device that includes a luminescent material layer between two electrodes. The technical effects of this invention include improved performance and efficiency of the functional material in the device, as well as improved film quality and stability.

Problems solved by technology

Because this method has drawbacks, such as high costs and complicated processes, recently, functional material patterning using a dispensing apparatus, which is convenient, and makes cost cutting possible, has been under study.
A pattern forming method using a conventional ink jet printing technique such as this has extremely outstanding characteristics, such as saving labor, saving resources, and not requiring mask making, but it also has the drawback of limiting the materials used in the composition (dispensing composition).
There is also the drawback that functional materials, which either react with water and alcohol, or are decomposed by alcohol, cannot be used.
Further, in a case in which benzene, toluene, xylene or another solvent that readily dissolves a non-polar material is used as the solvent for dissolving a functional material, due to the low boiling point (high vapor pressure) of such a solvent, the drawback is that it dries easily, and is apt to cause nozzle clog.
In addition thereto, in the case of a functional material having multiple constituents, the drawback is that phase separation occurs, the film becomes non-uniform, and the functional film is no longer able to carry out its original role.
Furthermore, in a case in which a material, which cannot be easily used, and has poor solubility like this, is used anyway, and the concentration of the dispensing composition is increased, precipitation and clogging occur.
When the concentration is made weaker in an attempt to prevent clogging, the drawback is that dispensing must be performed numerous times to achieve the characteristics of the functional material, and the number of processes must be increased.

Method used

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  • Composition, film manufacturing method, as well as functional device and manufacturing method therefor
  • Composition, film manufacturing method, as well as functional device and manufacturing method therefor
  • Composition, film manufacturing method, as well as functional device and manufacturing method therefor

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Experimental program
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first embodiment

[0040] A first embodiment of a composition of the present invention is a composition, which is utilized in functional material pattern film formation using a dispensing apparatus, and is a composition comprising a functional material and a solvent comprising at least one benzene derivative, which has 1 or more substituents, and these substituents have 3 or more carbon atoms in total.

[0041] According to this embodiment, the effects are that a non-polar or weakly polar functional material can be readily dissolved, and functional material selectivity can be broadened, and, in addition, especially in a case in which a solvent with a relatively low vapor pressure is used, from the standpoint of delayed drying capabilities, clogging is prevented at solvent dispensing time, and stable dispensing is made possible, and it is possible to achieve the prevention of content matter precipitation and phase separation during post-dispensing film formation in accordance with either subsequent heati...

second embodiment

[0054] A second embodiment of a composition of the present invention is a composition containing a solvent comprising at least dodecylbenzene, and a polyfluorene derivative of at least 1 of the compounds 1 through 5 hereinbelow. That is, the second embodiment is a composition, which utilizes a solvent, which is compatible with the second embodiment in a composition of the present invention, and which comprises at least dodecylbenzene as a solvent comprising a benzene derivative having 1 or more substituents, and these substituents have 3 or more carbon atoms in total, and which utilizes a polyfluorene derivative of at least 1 of the compounds 1 through 5 as a functional material that is compatible with the second embodiment.

[0055] This embodiment is a more preferred aspect than the first embodiment explained hereinabove, and from the standpoint of using the low vapor pressure solvent dodecylbenzene, and having delayed drying capabilities, can prevent clogging at solvent dispensing,...

third embodiment

[0064] A third embodiment of a composition of the present invention is a composition consisting of a functional material and a solvent comprising at least 1 benzene derivative, which has 1 or more substituents, and these substituents have 3 or more carbon atoms in total, and which has a vapor pressure (at room temperature; the same hereinbelow) of between 0.10 and 10 mmHg. That is, the third embodiment is a composition, which utilizes a solvent, which is compatible with the third embodiment in a composition of the present invention, and which comprises at least one benzene derivative with a vapor pressure of between 0.10 and 10 mmHg as a solvent comprising at least one benzene derivative having 1 or more substituents, with these substituents having 3 or more carbon atoms in total.

[0065] According to this embodiment, the effects are obtained that a non-polar or weakly polar functional material can be readily dissolved, and, in addition, clogging is prevented at solvent dispensing ti...

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Abstract

A composition, which can be used in an ink jet printing method, can use either a non-polar or a weakly polar material as a functional material, prevents clogging at dispensing time, achieves stable dispensing, and prevents precipitation of content matter during dispensing and phase separation during film formation, a uniform, homogenous functional film formed using this composition and a manufacturing method therefor, as well as an organic EL device or other such display device and a manufacturing method therefor. A composition of the present invention consists of a functional material, and a solvent comprising at least one benzene derivative, which has one or more substituents, and these substituents have 3 or more carbon atoms in total. A functional film of the present invention is formed using the above-mentioned composition. A display device of the present invention comprises luminescent material layers formed using the above-mentioned composition between two electrodes. The above-mentioned display device is an organic EL device or the like.

Description

TECHNICAL FIELD [0001] The present invention relates to a composition (dispensing composition), which is used to form a functional material patterned film, and can be stably dispensed using a dispensing apparatus, a film manufacturing method, which forms a uniform film (functional film) using this composition, as well as a functional device comprising luminescent material layers formed using the above-mentioned composition, and particularly a functional device (display device), such as an organic electroluminescent (EL) device, which is useful in luminescent display applications, and a manufacturing method therefor. BACKGROUND ART [0002] In the past, functional material patterning has been done using photolithography techniques. Because this method has drawbacks, such as high costs and complicated processes, recently, functional material patterning using a dispensing apparatus, which is convenient, and makes cost cutting possible, has been under study. A method, which uses an ink je...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C09D11/00C09D11/322C09D11/328H10K99/00
CPCH01L27/32H01L51/0005H01L51/0007H01L51/0036H01L51/5012H01L51/0043H01L51/0053H01L51/0059H01L51/0039C09K11/06H10K71/135H10K71/15H10K85/115H10K85/113H10K85/151H10K85/621H10K85/631H10K50/11C09K2211/1466H10K59/00
Inventor KANBE, SADAOSEKI, SHUNICHI
Owner CAMBRIDGE DISPLAY TECH LTD
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