Organic electronic device with a monomolecular layer or multi-monomolecular layer having electroconductive conjugated bonds

• US 5,017,975 A
• Filed: 07/12/1989
• Issued: 05/21/1991
• Est. Priority Date: 07/15/1988
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited 1006 OAZA Kadoma-Shi Osaka Japan
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Ogawa, Kazufumi
• Primary Examiner(s): James, Andrew J.
• Assistant Examiner(s): Crane, Sara W.
• Application Number:
  US07/378,910
• Time in Patent Office: 678 Days
• Field of Search: 357/8, 357/23.7, 437/1
• US Class Current: 257/40
• CPC Class Codes: H10K 10/466 Lateral bottom-gate IGFETs comprising only a single gate
• CPC Class Codes: H10K 85/143 Polyacetylene; Derivatives thereof
• CPC Class Codes: H10K 85/154 Ladder-type polymers
• CPC Class Codes: H10K 85/40 Organosilicon compounds, e.g. TIPS pentacene
• CPC Class Codes: H10K 85/701 Langmuir Blodgett films
• CPC Class Codes: Y10S 977/936 in a transistor or 3-terminal device

Abstract

The present invention provides an organic electronic device characterized by comprising a monomolecular or built-up multi-monomolecular layer having an insulating layer and an electroconductive conjugated bonds disposed between a first electrode and both a second and a third electrodes formed on a substrate, said device being operated by applying an voltage between said first electrode and said second electrode or said third electrode as well as between said second electrode and said third electrode, varying the voltage between said first electrode and said second electrode or said third electrode to control the electroconductivity of said electroconductive conjugated bonds via said insulating layer, whereby an electric current flowing across said electroconductive conjugated bonds between said second electrode and said third electrode is controlled, where said monomolecular layer is produced by utilizing the LB method or a chemical adsorption technique.

Claims

1. An organic electronic device characterized by comprising a monomolecular or built-up multi-monomolecular layer having an insulating layer and an electroconductive group containing conjugated bonds disposed between a first electrode and both a second and a third electrode formed on a substrate, said conjugated bonds connecting the second and third electrodes, said device being operated by applying a voltage between said first electrode and said second electrode or said third electrode as well as between said second electrode and said third electrode, varying the voltage between said first electrode and said second electrode of said third electrode to control the electroconductivity of said electroconductive conjugated bonds via said insulating layer, whereby an electric current flowing across said electroconductive conjugated bonds between said second electrode and said third electrode is controlled.

2. Organic electronic device according to claim 1 characterized in that said first electrode and at least a part of said second or third electrode are formed overlapping each other with said monomolecular or built-up multi-monomolecular layer being disposed between therebetween.

3. Organic electronic device according to claim 2 characterized in that said electroconductive conjugated bonds are not in contact with said first electrode.

4. Organic electronic device according to claim 1 characterized in that said first electrode and said third electrode are disposed with uniform spacing apart from each other.

5. Organic electronic device according to claim 1 characterized in that said first electrode is made of a metal having oxide film on the surface thereof.

6. Organic electronic device according to claim 1 characterized in that said electroconductive conjugated bonds are selected from a group consisting of polyacetylene, polymethylacetylene, polybutylacetylene, polycyanoacetylene, polydicyanoacetylene, polydiacetylene, polypyridylacetylene, polyphenylacetylene, polyphenylene, polyphenylenevinylene, polythienylene, polypyrrole, polyacene, polypyridinopyridine and polyaniline.

7. Organic electronic device according to claim 1 characterized in that said monomolecular or built-up multi-monomolecular layer is formed by utilizing the Langmuir-Blodgett method or chemical adsorption technique.

8. An organic electronic device characterized in that a silane surfactant is chemically adsorbed from a non-aqueous organic solvent to form a silicone bond on at least a first electrode formed on a surface of a substrate forming at least one monomolecular layer, said silane surfactant containing an insulating layer and electroconductive conjugated bonds chemically bonded to the surface of said first electrode directly via the silicon atom of said surfactant and a second and a third electrodes being formed on said monomolecular layer in contact with said electroconductive conjugated bonds, said device being operated by applying a voltage between said first electrode and said second electrode or said third electrode as well as between said second electrode and said third electrode, varying the voltage between said first electrode and said second electrode or said third electrode to control the electroconductivity of said electroconductive conjugated bonds via said insulating layer, whereby an electric current flowing across said electroconductive conjugated bonds between said second electrode and said third electrode is controlled.

9. Organic electronic device according to claim 8 characterized in that after at least one layer of said monomolecular film of silane surfactant containing unsaturated groups is formed, said unsaturated groups are boned to produce electroconductive conjugated bonds.

10. Organic electronic device according to claim 8 characterized in that as said silane surfactant, a chemical having a terminal --SiCl group is employed.

11. Organic electronic device according to claim 10 characterized in that as said silane surfactant, a chemical represented by (CH₃)₃ Si--C.tbd.C--(CH₂)n--SiCl₃ (where n is integer) or HC.tbd.C--C.tbd.C--(CH₂)n--SiCl₃ (where n is integer) is employed.

12. Organic electronic device according to claim 10 characterized in that in production of said electroconductive conjugated bonds, said substrate having said monomolecular layer built-up is immersed in an second organic solvent containing metal halide catalyst and said unsaturated groups of said monomolecular layer are polymerized.

13. Organic electronic device according to claim 12 characterized in that metal of said metal halide catalyst is Mo, W, Nb, or Ta.

14. Organic electronic device according to claim 12 characterized in that said metal halide catalyst and an organic Sn or Bi.

15. Organic electronic device according to claim 12 characterized in that said unsaturated group is an acetylenyl or diacetylenyl group, said organic solvent is an organic solvent containing oxygen, said metal halide catalyst is MoCl₅ and cis-type polyacetylene bondings is produced.

16. Organic electronic device according to claim 9 characterized in that in the step of producing said conjugated bonds, a substrate having a hydrophilic surface is immersed in a non-aqueous organic solvent containing a material having an acetylenic group (--C.tbd.C--) or diacetylenic group (--C.tbd.C--C.tbd.C--) and a group ##STR6## in solution to form a monomolecular layer of said material by chimical adsorption on said substrate, and said substrate having said monomolecular film built up is immersed in a second organic solvent containing metal halide catalyst to polymerize said acetylenyl groups of said monomolecular layer.

17. An organic electronic device characterized in that surfactant containing a double or triple bond group is spread on the water in a cell to form a monomolecular layer, said monomolecular layer is transferred at least one onto at least a first electrode on the surface of a substrate, chemically reacting said surfactant in the monomolecular layer to produce an insulating layer and electroconductive conjugated bonds, and forming a second electrode and a third electrode on said monomolecular layer in contact with said electroconductive conjugated bonds, said device being operated by applying a voltage between said first electrode and said second electrode or said third electrode as well as between said second electrode and said third electrode, varying the voltage between said first electrode and said second electrode or said third electrode to control the electroconductivity of said electroconductive conjugated bonds via said insulating layer, whereby an electric current flowing across said electroconductive conjugated bonds between said second electrode and said third electrode is controlled.

18. Organic electronic device according to claim 17 characterized in that a material having an acetylenic (--C.tbd.C--) group as an unsaturated group is used, said material dissolved in an organic solvent is spread over the surface of the water, and after the organic solvent is evaporated, the molecules of said material containing said acetylenic group remaining on the water are collected by a barrier in the direction parallel to the plane of the surface of the water, a monomolecular layer is formed on the surface of the water under a predetermined pressure applied to the surface, said monomolecular layer is built-up on said substrate while said substrate is moved up and down under a predetermined pressure applied to the surface of the water, and said substrate having said monomolecular layer built-up on the surface thereof is immersed in an organic solvent containing a metal halide catalyst to polymerize said acetylenyl groups of said monomolecular layer.

19. Organic electronic device according to claim 18 characterized in that said building up is conducted with a DC field being applied in the direction parallel to the surface of the water at the same time of applying said predetermined pressure.

20. Organic electronic device according to claim 18 or claim 19 characterized in that said organic solvent is an organic solvent containing oxygen, said metal halide catalyst is MoCl₅ and cis-type polyacetylene ultra-long conjugated bonds is produced.