JP2010135600A - Electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic device, which includes a solar cell and an organic EL element, has excellent visibility of the organic EL element, and is easy to manufacture. <P>SOLUTION: The electronic device includes a first electrode 22 and a second electrode 23 arranged with a space from each other on a same plane, an organic electroluminescence layer 24 arranged on the first electrode 22, a polymer power generating layer 25 arranged on the second electrode 23, and a transparent electrode 26 arranged to be in contact with one surface 24a of the organic electroluminescence layer 24 and one surface 25a of the polymer power generating layer 25. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic device including a solar cell and an organic electroluminescence element.

2. Description of the Related Art Conventionally, a large number of electronic devices including a display element such as an organic electroluminescence (Organic Electro-Luminescence, hereinafter, abbreviated as “organic EL”) element have been disclosed.
As such an electronic device, a device including a solar cell is disclosed in order to obtain power for operating a display element (see, for example, Patent Document 1). In this electronic device, a solar cell is stacked on an organic EL element via a circularly polarizing plate.
JP 2008-107726 A

  Although the electronic device disclosed in Patent Document 1 enables the organic EL element to operate for a long time by arranging the solar cell on the outermost surface, the solar cell and the organic EL element are arranged on the same surface. Therefore, there has been a problem that the visibility of display by the organic EL element is not sufficient. Moreover, since a solar cell and an organic EL element are laminated | stacked, there existed a problem that many members needed and a manufacturing process also increased.

  This invention is made in view of the said situation, Comprising: In the electronic device provided with the solar cell and the organic EL element, it is excellent in the visibility of an organic EL element, and provides an electronic device with easy manufacture. With the goal.

  The electronic device of the present invention includes a first electrode and a second electrode that are spaced apart from each other on the same surface, an organic electroluminescence layer provided on the first electrode, and the second electrode. The provided polymer power generation layer, the surface of the organic electroluminescence layer opposite to the surface in contact with the first electrode, and the surface of the polymer power generation layer opposite to the surface in contact with the second electrode And a transparent electrode provided so as to be in contact with the surface.

  According to the electronic device of the present invention, the first electrode and the second electrode arranged on the same surface and spaced apart from each other, the organic electroluminescence layer provided on the first electrode, and the second electrode The polymer power generation layer provided on the surface, the surface of the organic electroluminescence layer opposite to the surface in contact with the first electrode, and the surface of the polymer power generation layer in contact with the second electrode And a transparent electrode provided so as to be in contact with the surface on the opposite side, so that the visibility of the display pattern by the organic electroluminescence layer is excellent. Further, since the organic electroluminescence layer and the polymer power generation layer can be formed on the same surface with respect to the transparent electrode, the manufacturing process can be simplified, and the manufacturing cost can be reduced.

The best mode of the electronic apparatus of the present invention will be described.
This embodiment is specifically described for better understanding of the gist of the invention, and does not limit the present invention unless otherwise specified.

FIG. 1 is a schematic configuration diagram showing an embodiment of an electronic apparatus of the present invention. FIG. 2 is a schematic sectional view showing an embodiment of the power generation / display element constituting the electronic apparatus of the present invention.
The electronic device 10 of this embodiment is generally configured by a power generation / display element 20, a switch 31, a secondary battery 32, a diode 33, and conductive portions 34, 35, and 36 that electrically connect them. Yes.

  The power generation / display element 20 includes a base material 21, a first electrode 22 and a second electrode 23 disposed on the one surface 21 a of the base material 21 at intervals, and a base material 21 of the first electrode 22. An organic electroluminescence layer (hereinafter sometimes abbreviated as “organic EL layer”) 24 provided on a surface opposite to the surface in contact with the surface (hereinafter referred to as “one surface”) 22a; The polymer power generation layer 25 provided on the surface of the second electrode 23 opposite to the surface in contact with the base material 21 (hereinafter referred to as “one surface”) 23 a and the first of the organic EL layer 24. The surface opposite to the surface in contact with the electrode 22 (hereinafter referred to as “one surface”) 24 a and the surface on the opposite side to the surface in contact with the second electrode 23 of the polymer power generation layer 25. (Hereinafter referred to as “one surface”.) The transparent electrode 26 provided in contact with 25a and the transparent electrode 2 And a light-transmitting substrate 27 provided on a surface (hereinafter referred to as “one surface”) 26 a opposite to the surface in contact with the organic EL layer 24 and the polymer power generation layer 25. ing.

The first electrode 22 is provided in the central portion of the one surface 21a of the base member 21, and the outer edge of the first electrode 22 is spaced a predetermined distance from the first electrode 22, that is, without contacting each other. Two electrodes 23 are provided.
Further, the first electrode 22 and the second electrode 23 are composed of conductive portions having the same thickness provided on one surface 21 a of the base material 21. The organic EL layer 24 and the polymer power generation layer 25 laminated on the first electrode 22 and the second electrode 23 are disposed on the same surface.
The transparent electrode 26 is disposed on the entire surface of the light transmissive substrate 27 facing the organic EL layer 24 and the polymer power generation layer 25 (hereinafter referred to as “one surface”) 27a.

In the electronic device 10, a laminate composed of the base material 21, the first electrode 22, the organic EL layer 24, the transparent electrode 26 and the light transmissive base material 27 constitutes an organic EL element.
In addition, a laminate including the base material 21, the second electrode 23, the polymer power generation layer 25, the transparent electrode 26, and the light transmissive base material 27 constitutes a polymer solar cell element.
That is, the power generation / display element 20 includes an organic EL element and a polymer solar cell element on the same surface.

The first electrode 22 is connected to the second contact 31 </ b> C of the switch 31 through the conductive portion 34. A diode 33 is connected in the middle of the conductive portion 34.
The second electrode 23 is connected to the first contact 31 </ b> B of the switch 31 through the conductive portion 35.
The transparent electrode 26 is connected to the movable part 31 </ b> A of the switch 31 through the conductive part 36. Further, a secondary battery 32 is connected in the middle of the conductive portion 36.

  Further, the conductive portion 34 and the conductive portion 35 are arranged at a predetermined interval without contacting each other.

The movable portion 31A of the switch 31 can be switched and connected to the first contact 31B and the second contact 31C of the switch 31, and is a circuit including the power generation / display element 20 and the conductive portions 34, 35, 36, and the like. Can be disconnected (the state shown in FIG. 1).
That is, when the movable part 31A of the switch 31 is connected to the first contact 31B of the switch 31, the polymer solar cell element functions, while the movable part 31A of the switch 31 is connected to the second contact 31C of the switch 31. When connected to, the above organic EL element functions.

  The substrate 21 is not particularly limited as long as it is in the form of a film, a sheet, or a plate. For example, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-methacrylic acid copolymer, ethylene-methacrylic acid. Films, sheets or plates made of ester copolymers, ethylene-acrylic acid copolymers, ethylene-acrylic acid ester copolymers and their metal cross-links, etc., and weaves made of inorganic fibers such as glass fibers and alumina fibers Cloth, non-woven fabric, mat, paper, etc. or a combination thereof, woven fabric, non-woven fabric, mat, paper, etc. made of organic fibers such as polyester fiber, polyamide fiber, etc., or a combination thereof, or impregnated with resin varnish Coated members, glass substrates, various metal substrates, etc. It is.

  The first electrode 22 and the second electrode 23 are formed on one surface 21a of the first base material 21 by a printing method such as screen printing or ink jet printing in a predetermined pattern using a polymer type conductive ink. Alternatively, the conductive foil is etched into a predetermined pattern, or the predetermined pattern is formed by metal plating.

  Examples of polymer-type conductive inks are those in which conductive fine particles such as silver powder, gold powder, platinum powder, aluminum powder, palladium powder, rhodium powder, carbon powder (carbon black, carbon nanotube, etc.) are blended in the resin composition Is used.

If a thermosetting resin is used as the resin composition, the polymer-type conductive ink can form a coating film that forms the first electrode 22 and the second electrode 23 at 200 ° C. or less, for example, about 100 to 150 ° C. It becomes a curable type. Flow paths electrical coating film forming the first electrode 22 and second electrode 23 is formed by the conductive particles forming a coating film are in contact with each other, the resistance value of the coating film is 10 ^-5 Ω · cm order is there.
Further, as the polymer type conductive ink in the present invention, known ones such as a photocuring type, a penetrating drying type, and a solvent volatilization type are used in addition to the thermosetting type.

  The photocurable polymer type conductive ink contains a photocurable resin in the resin composition and has a short curing time, so that the production efficiency can be improved. Examples of the photo-curing polymer type conductive ink include, for example, a thermoplastic resin alone, or a blend resin composition of a thermoplastic resin and a crosslinkable resin (particularly, a crosslinkable resin composed of polyester and isocyanate) and 60 fine conductive particles. More than 10% by mass and 10% by mass or more of a polyester resin, that is, a solvent volatile type or a crosslinked / thermoplastic combined type (however, the thermoplastic type is 50% by mass or more), thermoplastic A resin resin or a blend resin composition of a thermoplastic resin and a crosslinkable resin (especially a crosslinkable resin composed of polyester and isocyanate) is blended with 10% by mass or more of a polyester resin, that is, a crosslinkable type or a crosslinked / crosslinked resin. A thermoplastic combination type is preferably used.

Moreover, as electroconductive foil which makes the 1st electrode 22 and the 2nd electrode 23, copper foil, silver foil, gold foil, platinum foil, aluminum foil, etc. are mentioned.
Furthermore, examples of the metal plating that forms the first electrode 22 and the second electrode 23 include copper plating, silver plating, gold plating, and platinum plating.

  As a material forming the organic EL layer 24, a π-conjugated polymer or a dye-containing polymer soluble in an organic solvent is used.

  As a material forming the polymer power generation layer 25, a material for forming a functional film disclosed in JP-T-2005-530351 and JP-A-2006-12802 is used.

  As the transparent electrode 26, tin-doped indium oxide (ITO), fluorine-doped tin oxide (FTO), antimony-doped tin oxide (ATO), aluminum-doped zinc oxide (AZO). : Aluminum-doped Zinc Oxide) and gallium-doped Zinc Oxide (GZO: Gallium-doped Zinc Oxide) and the like.

  As the light transmissive substrate 27, a light transmissive and flexible material is used. For example, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-methacrylic acid copolymer, ethylene-methacrylic acid ester copolymer are used. Examples thereof include a film, a sheet, or a plate made of a polymer, an ethylene-acrylic acid copolymer, an ethylene-acrylic acid ester copolymer, and a metal cross-linked product thereof.

  The light transmissive substrate 27 and the transparent electrode 26 may be integrated. In that case, a thin film of conductive metal oxide formed by the transparent electrode 26 is provided on the entire surface of the one surface 27 a of the light transmissive base material 27 by a sputtering method or the like, and consists of the light transmissive base material 27 and the transparent electrode 26. A transparent conductive substrate is used.

The power generation / display element 20 is bonded and integrated with the above-described constituent members, and the organic EL layer 24 and the polymer power generation layer 25 are sealed to prevent contact between these layers and air. Therefore, a sealing adhesive (not shown) is used.
The sealing adhesive is not particularly limited, and a thermosetting adhesive, an ultraviolet curable adhesive, an electron beam curable adhesive, or the like is used.
Examples of the thermosetting adhesive include phenol resin, epoxy resin, polyurethane curable resin, urea resin, melamine resin, and acrylic reaction resin.
Examples of the UV curable adhesive include UV curable acrylic resin, UV curable urethane acrylate resin, UV curable polyester acrylate resin, UV curable polyurethane resin, UV curable epoxy acrylate resin, and UV curable imide acrylate resin. It is done.
Electron beam curable adhesives include electron beam curable acrylic resins, electron beam curable urethane acrylate resins, electron beam curable polyester acrylate resins, electron beam curable polyurethane resins, electron beam curable epoxy acrylate resins, and cationic curable resins. Resin etc. are mentioned.

The switch 31 is not particularly limited, and any switch can be used as long as the movable portion 31A can be switched and connected to the first contact 31B and the second contact 31C.
The secondary battery 32 is not particularly limited, and a general secondary battery is used.
The diode 33 is not particularly limited, and a diode used for a general electronic device is used.
The conductive portions 34, 35, and 36 are not particularly limited, and the same materials as the first electrode 22 and the second electrode 23 described above and general wiring are used.

Next, a method for manufacturing the electronic device 10 will be described with an example.
First, the power generation / display element 20 is manufactured.
In order to produce the power generation / display element 20, a predetermined shape that forms each of the first electrode 22 and the second electrode 23 on a part of one surface 21a of the base material 21 by a printing method using a polymer type conductive ink. The printing layer is formed.
In this step, gravure printing, flexographic printing, die coating, spray coating, screen printing, and the like are used as printing methods.

  In addition to the step of forming the first electrode 22 and the second electrode 23, a conductive material such as ITO, FTO, or ATO is formed on the entire surface 27a of the light transmissive substrate 27 by sputtering or the like. A metal oxide is vapor-deposited to form a transparent electrode 26 composed of a thin film of the conductive metal oxide, and a transparent conductive substrate composed of a light transmissive substrate 27 and a transparent electrode 26 is obtained.

Next, the organic EL layer 24 is formed on the transparent electrode 26 provided on the one surface 27a of the light-transmitting substrate 27 by a printing method using a π-conjugated polymer or a dye-containing polymer soluble in an organic solvent. A polymer layer is formed on the transparent electrode 26 provided on the one surface 27a of the light-transmitting substrate 27 by a printing method using the functional film-forming material described above while forming a printing layer having a predetermined shape. A printing layer having a predetermined shape forming the power generation layer 25 is formed.
In this step, an inkjet method, a screen printing method, or the like is used as the printing method.

  Next, the first electrode 22 and the second electrode 23 are used by using a sealing adhesive so that the organic EL layer 24 contacts the first electrode 22 and the polymer power generation layer 25 contacts the second electrode 23. A transparent conductive base material provided with an organic EL layer 24 and a polymer power generation layer 25 is bonded to the base material 21 provided with a power generation / display element 20.

Next, the first electrode 22 and the second contact 31 </ b> C of the switch 31 are connected via the conductive portion 34, and the diode 33 is connected in the middle of the conductive portion 34.
Further, the second electrode 23 and the first contact 31 </ b> B of the switch 31 are connected via the conductive portion 35.
Furthermore, the transparent electrode 26 and the movable part 31 </ b> A of the switch 31 are connected via the conductive part 36 to obtain the electronic device 10.

Next, the operation of the electronic device 10 will be described.
In the electronic device 10, when the movable portion 31A of the switch 31 is connected to the first contact 31B of the switch 31, the polymer solar cell element functions.
That is, when light strikes the power generation / display element 20 from the other surface (outermost surface) 27 b side of the light transmissive substrate 27, power is generated in the polymer power generation layer 25. The generated power is stored in the secondary battery 32.

On the other hand, when the movable portion 31A of the switch 31 is connected to the second contact 31C of the switch 31, the organic EL element functions.
That is, the organic EL layer 24 emits light by the electric power stored in the secondary battery 32, and a display pattern formed by the organic EL layer 24 is displayed.

  According to this electronic apparatus 10, the transparent electrode 26 is used as a common electrode, and the organic EL layer 24 and the polymer power generation layer 25 are disposed on the same surface with respect to the transparent electrode 26. Excellent pattern visibility. Moreover, since the organic EL layer 24 and the polymer power generation layer 25 can be formed on the same surface with respect to the transparent electrode 26 by a printing method, the manufacturing process can be simplified, and thus the manufacturing cost can be reduced. can do.

It is a schematic block diagram which shows one Embodiment of the electronic device of this invention. It is a schematic sectional drawing which shows one Embodiment of the electric power generation / display element which comprises the electronic device of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Electronic device, 20 ... Electric power generation / display element, 21 ... Base material, 22 ... 1st electrode, 23 ... 2nd electrode, 24 ... Organic electroluminescent layer, 25. ..Polymer power generation layer, 26 ... transparent electrode, 27 ... light transmissive substrate, 31 ... switch, 32 ... secondary battery, 33 ... diode, 34, 35, 36 ..Conductive parts.

Claims (1)

A first electrode and a second electrode arranged on the same plane and spaced apart from each other, an organic electroluminescence layer provided on the first electrode, and a polymer power generation layer provided on the second electrode And the surface of the organic electroluminescence layer opposite to the surface in contact with the first electrode and the surface of the polymer power generation layer opposite to the surface in contact with the second electrode. And a transparent electrode.

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