Electrode device for organic device, electronic device having electrode device for organic device, and method of forming electrode device for organic device

• US 20050123751A1
• Filed: 08/17/2004
• Published: 06/09/2005
• Est. Priority Date: 08/25/2003
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Kumaki, Daisuke, Tsutsui, Tetsuo
• Granted Patent: US 7,504,049 B2
• Time in Patent Office: Days
• US Class Current: 428/364
• CPC Class Codes: H01B 1/20 Conductive material dispersed in non-conductive organic material organic macromolecular compounds or compositions C08
• CPC Class Codes: H01B 1/22 the conductive material comprising metals or alloys
• CPC Class Codes: H10K 10/462 Insulated gate field-effect transistors [IGFETs]
• CPC Class Codes: H10K 50/19 Tandem OLEDs
• CPC Class Codes: H10K 50/82 Cathodes
• CPC Class Codes: H10K 71/60 Forming conductive regions or layers, e.g. electrodes
• CPC Class Codes: H10K 85/324 comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/631 Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
• CPC Class Codes: Y10T 428/2913 Rod, strand, filament or fiber

Abstract

To provide an electrode for an organic device which can realize a hole injection function and/or an electron injection function from a totally different point of view from metal donor doping. A composite material in which conductive particles of a particulate conductive inorganic compound (the diameter is 1 (nm) to 100 (nm), preferably, 1 (nm) to 20 (nm)) are dispersed in one or plural kinds of organic compounds 101 is layered on a surface of an organic layer 110 of an organic device where an electrode is to be formed to form an electrode for an organic device 100. As to the thus formed electrode, since the densely dispersed conductive particles 102 have large specific surface area, interaction between the conductive particles 102 and the organic compound 101 realizes a function of a donor or an acceptor. Besides, since adhesion with the organic layer 110 is high for the existence of the matrix of the organic compound 101, the electrode is suitable for an organic device.

Claims

1. An electrode for an organic device used for an organic device that is a functional element using properties of an organic compound,

wherein said electrode comprises a composite material in which conductive particles of a particulate conductive inorganic compound are dispersed in a matrix including one or plural kinds of organic compounds.

2. The electrode for an organic device according to claim 1,

wherein the particle diameter of the conductive particles is 1 (nm) to 100 (nm).

3. The electrode for an organic device according to claim 1,

wherein the conductivity of the conductive particles is 10⁻

5 (S/m) or more.

4. An electronic device comprising the electrode for an organic device according to claim 1,

wherein the electronic device is one selected from the group consisting of a cellular phone, a personal computer, a monitor, a video camera, a digital camera, a goggle type display, a navigation system, audio components, a car audio system, a game machine, a mobile computer, a portable game machine, an electronic book, and an image reproducing device equipped with a recording medium.

7. The electrode for an organic device according to claim 2,

wherein the particle diameter of the conductive particles is 1 (nm) to 100 (nm).

8. The electrode for an organic device according to claim 2,

wherein the conductivity of the conductive particles is 10⁻

5 (S/m) or more.

5. A method of forming an electrode for an organic device which is a functional element using properties of an organic compound,

wherein the electrode for an organic device is formed by dispersing an organic compound and conductive particles which are a particulate inorganic compound in one solvent, and wet-coating on a surface where the electrode for an organic device is formed, with the solution.

6. A method of forming an electrode for an organic device which is a functional element using properties of an organic compound,

wherein the electrode for an organic device is formed by co-depositing a depositable organic compound and a depositable conductive inorganic compound on a surface where the electrode for an organic device is formed, controlling the weight ratio to be in the range of 4:

1 to 1;

4, thereby dispersing conductive particles of an excessive particulate conductive inorganic compound in a matrix of the organic compound.