JP2014096507A - Electrode lead-out structure of organic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that, while it is general to electrically connect using a lead wire or an FPC and necessary soldering when connecting a plurality of photoelectric conversion element devices, materials used for an organic semiconductor are weak to heat.SOLUTION: An electrode lead-out structure of an organic device 1 that simultaneously connects all organic devices is achieved by sandwiching and holding a plurality of photoelectric conversion elements 10 composed of organic semiconductor layers laminated between paired facing transparent electrode 10a and negative electrode 10e with a connector 13 having an edge cover 131 composed of an insulating material and a conductive part 132 of a conductive material inside the edge cover therein.

Description

  The present invention is an organic device in which an organic photoelectric conversion element formed on a transparent substrate is sealed with a sealing substrate, and an extraction electrode is provided on the peripheral end of the transparent substrate, and a plurality of connectors are provided on a connector having a conductive portion. It is related with the electrode extraction structure of the organic device which pinches and connects all the organic devices electrically.

  In recent years, with the growing interest in solar energy, which is clean energy, the development of photoelectric conversion elements has been remarkable. A photoelectric conversion element is an element that converts light energy into electrical energy, and vice versa.

  As a direct conversion of light energy to electrical energy, solar cells are growing rapidly. In particular, organic solar cells that are inexpensive, lightweight, and flexible are attracting attention as next-generation solar cells. Improvements in organic materials and manufacturing methods are ongoing, and high-efficiency organic solar cells having a photoelectric conversion efficiency of 8% or more have been realized. Moreover, there exists an organic EL (Electro Luminescence) element as what converts an electrical energy into a light energy. Organic EL devices have been supplied to the market as display devices and illumination light sources from the viewpoint of energy saving.

  In Patent Document 1, as shown in FIG. 11, a light emitting portion 57 in which a light emitting layer 54 and a dielectric layer 55 are sandwiched between a transparent electrode 53 and a back electrode 56 is integrally formed on a lower glass substrate 52. The EL 50 is shown in which a pair of upper and lower glass substrates 51 and 52 are welded and joined with a sealing member 59. A through hole 51a is formed in the upper glass substrate, a paste coating / firing film 60 is formed on the inner diameter portion of the through hole, and a laminated vapor deposition film 61 is applied to the upper surface of the upper glass substrate in the vicinity of the through hole. Is flowed into the through-hole 51a to form a solder portion 62 that is electrically connected to the extraction electrode 58 of the light emitting portion 57, and a lead wire (not shown) is attached to the solder portion 62 to be connected to an external electrode.

  In Patent Document 2, as shown in FIG. 12, at least one is a transparent face material 70, and the other face material is sandwiched between a laminate 71 which is a display device or a solar cell module, and the transparent face material and the laminate. An apparatus having a layered portion 72 and a flexible printed circuit board 73 (flexible printed circuit, hereinafter abbreviated as FPC) for transmitting an electrical signal connected to the outer peripheral portion of the laminate is shown.

  In the structure described above, when connecting a plurality of devices, it is necessary to electrically connect the devices using lead wires or FPC, and soldering is also required at the connection site. That is, since each device is connected using a REIT wire or the like in a separated state, the strength is low or it takes time and labor. Therefore, a structure that can easily and reliably electrically connect a plurality of devices is sought as follows.

JP 2000-243559 A JP 2012-158688 A

  Not only the use of a single device but also, for example, a plurality of devices are connected and used as a large advertisement, or a plurality of devices having different colors are combined and used as design lighting.

  However, in the device using the photoelectric conversion element described above, soldering is required for electrical connection to an external electrode or an adjacent device. In general, materials used for organic semiconductors are vulnerable to heat. Therefore, when solder is used as the fixing agent, there is a problem that defects occur in the organic device due to heating during fixing.

  In addition, it is required to reduce the heating of the photoelectric conversion element made of an organic semiconductor as much as possible in a subsequent process.

  Furthermore, since each organic device becomes a point contact at one point, there is also a problem that the strength of the connected panel unit is low.

  Furthermore, there is a problem that wiring for connecting adjacent organic devices becomes complicated.

  Therefore, there is a need for a connection structure in which a plurality of organic devices can be easily connected without soldering, and the plurality of connected devices have durability. There is no structure.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to reliably connect a plurality of organic devices in a solder-free manner and to provide various assembled panel units. The object is to provide an electrode extraction structure for an organic device.

  According to the present invention, a transparent substrate, a transparent electrode serving as an anode provided on the transparent substrate, a cathode disposed opposite to the transparent electrode, and an organic semiconductor layer laminated between the anode and the cathode An extraction device provided at a peripheral edge of the transparent substrate, a sealing substrate for sealing the organic device, an edge cover made of an insulating material, and an inner side of the edge cover A connector having a conductive portion of a pair of conductive materials provided, wherein the connector is formed longer than one side of the transparent substrate or a plurality of connectors are arranged in series, and the extraction electrodes of each of the plurality of transparent substrates Are integrated with each other in the row direction, and the extraction electrode and the conductive portion are brought into pressure contact with each other to take out the electrode.

  Further, according to the present invention, a plurality of the extraction electrodes are continuously formed in the peripheral direction of the transparent substrate in the length direction of the transparent substrate.

  Further, according to the present invention, the extraction electrode is routed to the back surface of the transparent substrate, the anode is exposed on the surface of the transparent substrate, and the conductive portion is in pressure contact with the surface of the transparent substrate of the connector. The anode is taken out, the cathode is exposed on the back surface, and the cathode is taken out from the conductive portion pressed against the back surface of the transparent substrate.

  Further, according to the present invention, the connector is provided with the edge cover integrally formed on the upper side and the lower side, the conductive portion is provided on each, and the upper edge cover has the transparent substrate in the upper row. The transparent substrate in the lower row is sandwiched between the lower edge cover and the take-out electrodes and the conductive portions of the transparent substrates in the adjacent rows are pressed to take out the electrodes. It is characterized by doing.

  Further, according to the present invention, the transparent substrate is sandwiched between the plurality of transparent substrates integrated by the connector with the short connector that fills the line between the sides.

  Furthermore, according to the present invention, the adjacent connector is provided with a slide-type, concave-convex type or hook-type connecting portion, and the adjacent connectors are integrated.

  Furthermore, according to the present invention, the outer periphery of the connector is reinforced with a frame.

  According to the electrode take-out structure of the organic device of the present invention, the following effects can be obtained.

  First, a plurality of organic devices are sandwiched and supported by one connector, and the extraction electrode of each organic device is pressed into contact with the conductive portion of each connector, so that all organic devices can be electrically connected simultaneously. Thereby, since a soldering process becomes unnecessary, the heating to the organic-semiconductor material in a manufacturing process can be suppressed to the minimum.

  Second, a plurality of organic devices can be sandwiched on both sides of the connector in the length direction. Thus, one large panel unit in which a plurality of organic devices are combined in the row direction or the column direction of the connector can be provided.

  Third, the connector can be freely extended in the length direction through the organic device. Thereby, the length of one side of the panel unit can be arbitrarily selected. Moreover, the adjacent connector is electrically connected through the extraction electrode of the organic device.

  Fourthly, since adjacent connectors can be integrated at the connecting portion, a panel unit can be made with the connectors.

  Fifth, since a slide, a concavo-convex part, and a hook are formed in the connection part of the connector, it can be connected easily and reliably. Thereby, the magnitude | size of the width direction of a panel unit can be selected arbitrarily.

  Sixth, since the conductive portion in the connector is connected, the routing of the anode and the cathode can be accommodated in the connector.

  Seventh, since the connector can be easily connected, the size and shape of the panel unit can be freely set, and the number of organic devices to be sandwiched can be freely increased or decreased.

  Eighth, since the outer periphery of the panel unit in which a plurality of organic devices are connected can be covered with a frame, each organic device is hardly detached and the strength of the panel unit is improved.

  Ninth, when electrically connecting a plurality of adjacent organic devices, a connecting member such as a lead wire or FPC can be eliminated, so that the cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS (A) The top view of the organic device in 1st Embodiment of this invention, (B) The top view explaining the connection structure of the organic device. (A) The top view explaining the multistage connection structure of the organic device of this invention, (B) The partial expanded sectional view of the connector, (C) The top view explaining another multistage connection structure, (D) Of the connector It is a partially expanded sectional view. (A) (B) is a top view explaining the connection structure of the organic device of this invention. BRIEF DESCRIPTION OF THE DRAWINGS (A) The top view of an organic device of this invention, (B) The top view explaining the connection structure of the organic device. (A) (B) is a top view of the panel unit which connected the organic device of this invention. BRIEF DESCRIPTION OF THE DRAWINGS (A) The top view explaining an organic device of this invention, (B) The top view explaining a photoelectric conversion element. It is (A) top view, (B) side view, (C) expanded sectional view, (D) sectional view explaining the connector of this invention. (A) The perspective view explaining the structure of a slide type | mold of the connector of this invention, (B) The top view explaining the connection, (C) (D) The top view explaining the structure of another slide type, (E) It is a top view explaining the connection. It is a top view explaining the structure of (A) (B) concavo-convex type of the connector of the present invention, and (C) a top view explaining the connection. It is a top view explaining the structure of (A) (B) hook type | mold of the connector of this invention, (C) The top view explaining the connection. It is sectional drawing explaining the connection method of the conventional photoelectric conversion apparatus. It is sectional drawing explaining the connection method of the conventional photoelectric conversion apparatus.

  With reference to FIGS. 1 to 10, an embodiment of an electrode extraction structure for an organic device of the present invention will be described.

  FIG. 1A is a plan view of the organic device of the present invention, and FIG. 1B is a plan view for explaining the connection of the organic devices. 2A is a plan view illustrating a multistage connection structure of the organic device of the present invention, and FIG. 2B is a partially enlarged view of aa line in FIG. 2A illustrating a connector of the multistage connection structure. FIG. 2C is a cross-sectional view, FIG. 2C is a plan view illustrating another multistage connection structure, and FIG. 2D is a part of aa line in FIG. 2C illustrating a connector of the multistage connection structure. It is an expanded sectional view. 3 (A) and 3 (B) are plan views illustrating the connection structure of the organic device of the present invention. FIG. 4A is a plan view of the organic device of the present invention, and FIG. 4B is a plan view for explaining the connection of the organic device. FIG. 5A is a plan view of a panel unit in which the organic devices of the present invention are connected, and FIG. 5B is a plan view of a panel unit having another frame structure. FIG. 6A is a plan view illustrating an organic device of the present invention, and FIG. 6B is a plan view illustrating a sealed photoelectric conversion element. 7A is a plan view illustrating the connector of the present invention, FIG. 7B is a side view thereof, and FIG. 7C is an enlarged sectional view taken along the line bb of FIG. 7A. FIG. 7D is a cross-sectional view taken along the line cc of FIG. 6A illustrating the organic device of the present invention. FIG. 8A is a perspective view for explaining the slide type connector of the present invention, FIG. 8B is a plan view for explaining the connecting structure, and FIGS. 8C and 8D are other slide types. FIG. 8E is a plan view illustrating the connector, and FIG. 8E is a plan view illustrating the connection structure. 9A and 9B are plan views for explaining the concave-convex connector of the present invention, and FIG. 9C is a plan view for explaining the connecting structure. 10 (A) and 10 (B) are plan views for explaining the hook type connector of the present invention, and FIG. 10 (C) is a plan view for explaining the connecting structure.

  With reference to FIGS. 1-4, the structure which connects the organic device 1 of this invention with the connector 13 is demonstrated.

  The organic device 1 of the present invention includes at least a photoelectric conversion element 10, an extraction electrode 11, a sealing substrate 12, and a connector 13. In the organic device 1, an organic photoelectric conversion element 10 is sealed with a sealing substrate 12, and the extraction electrode 11 of the photoelectric conversion element is sandwiched by a connector 13 including an edge cover 131 and a pair of conductive portions 132 provided on the inside. And electrically connected devices.

  The individual organic device 1 and the photoelectric conversion element 10 will be described in detail with reference to FIG. 6, and the connector 13 will be described in detail with reference to FIG.

  FIG. 1 is an example of a structure in which all the organic devices 1 are sandwiched by a pair of long-side connectors 13a and 13a and connected in the row direction.

  Specifically, as illustrated in FIG. 1A, a pair of connectors 13 is provided with long-side connectors 13 a and 13 a that are longer than the length direction L of the organic device 1. Then, as shown in FIG. 1 (B), a plurality of organic devices 1 are inserted into the connector 13a and supported within the range of the length of the long side connector 13a. Since the anode and cathode of each extraction electrode 11 are pressed against the conductive portion 132 of the long-side connector 13a, all the connected organic devices 1 can be electrically connected simultaneously. The plurality of organic devices 1 are mechanically integrated by a long side connector 13a provided on the upper and lower sides. The short side connector 13b is integrated by sandwiching the side of the organic device 1 between the long side connectors 13a.

  The short-side connector 13b that is shorter than the length direction L of the organic device 1 can be conducted simply by overlapping the conductive portion 132 of the short-side connector with the conductive portion 132 of the long-side connector 13a. Thereby, the conductive part 132 on the front side of the transparent substrate 10a takes out the anode (or cathode), the conductive part 132 on the back side of the transparent substrate 10a takes out the cathode (or anode), and the external lead electrode 14 (not shown). )).

  In addition, the space | interval which clamps an organic device can select arbitrary space | intervals, as long as adjacent organic devices do not overlap. In the connection structure sharing the pair of long side connectors 13a, a plurality of organic devices 1 can be connected only in the row direction.

  FIG. 2 illustrates a structure in which a panel in which a plurality of organic devices are connected in the row direction is connected in multiple stages in the column direction.

  As shown in FIGS. 2A and 2C, a single column panel in which a plurality of organic devices are connected in the row direction can be connected in multiple stages in the column direction. At this time, except for both ends of the panels connected in multiple stages, they are connected using dedicated connection connectors 13c and 13d. Specifically, connecting connectors 13c and 13d shown in FIGS. 2B and 2D are used. 2B and 2D are cross-sectional views taken along the line aa surrounded by a dotted frame in FIGS. 2A and 2C.

  The connection connectors 13c and 13d include an edge cover 131 having a shape in which a U-shape and an inverted U-shape each having an opening at the top and bottom are integrated, and a pair of conductive portions 132 provided at both ends inside the edge cover. Two organic devices 1 can be sandwiched by a pair of conductive portions 132 provided at both ends. Moreover, the edge cover 131 is formed in arbitrary length similarly to the long side connector 13a, and can electrically connect all the connected organic devices 1 simultaneously.

  Using the connection connectors 13c and 13d, a plurality of organic devices 1 connected in the row direction can be stacked in a plurality of stages in the column direction. Since the connecting connectors 13c and 13d are integrated, the mechanical support can be strengthened.

  In this case, since the electrical connection is completed for each row, a jumper line is required for electrical connection between all rows. As a structure for providing the jumper wire, for example, as shown in FIG. 2A, the jumper wire 16 may be passed to the end of the connector for connection 13c. Further, as shown in FIG. 2D, the connection may be completed in the connector 13d, and a pair of conductive portions 132 facing each other by extending the jumper wire 16 in the edge cover 131 of the connector 13d. Connect each other electrically.

  Thereby, the conductive portion 132 on the front side of the transparent substrate 10a takes out the anode (or cathode), and the conductive portion 132 on the back side of the transparent substrate 10a takes out the cathode (or anode), and is routed to the external lead-out electrode 14. Is done.

  Here, the external lead-out electrode 14 is an electrode extending from the conductive portion 132 of the connector 13 and is electrically connected to an external electrode (not shown). The external lead-out electrode 14 may be any conductive material, for example, the same material as the conductive portion 132 or a metal wire. In the present embodiment, the external lead electrode 14 extending from one end of the conductive portion 132 in the lower right portion of the organic device 1 as shown in FIGS. 2A and 2C is shown. For example, it is formed at an arbitrary location such as the center of the connector. In addition, a plurality of external lead electrodes 14 may be held in one connector. For example, an arbitrary number may be held in both ends of the connector, in the center and both ends of the connector, or in the center of the connector. Yes (not shown).

  Since the conductive part 132 on the front side of the transparent substrate 10a takes out the anode (or cathode) and the conductive part 132 on the back side of the transparent substrate 10a takes out the cathode (or anode), the front side and the back side of the transparent substrate 10a Although the double-sided electrode is taken out from both sides, one electrode may be taken out from either the front side or the back side of the transparent substrate by drawing one electrode in the edge cover 131 of the connector. As in the case described above, an arbitrary number of the extraction electrodes can be extracted not only at both ends of the connector but also at arbitrary locations such as the central portion of the connector. Specifically, the electrode routed in the edge cover 131 of the connector is taken out by attaching a solderable pad or the like to the outside of the edge cover 131 that protrudes from the edge cover at an arbitrary position. Note that a metal foil or a conductive wire provided between the edge cover 131 and the conductive portion 132 may be extended to the outside of the edge cover 131 and taken out.

  FIG. 3 illustrates a structure in which a plurality of organic devices are connected to a connector having an arbitrary shape. As an example, an L-shaped connector and a cross-shaped connector are shown.

  As shown in FIG. 3A, an L-shaped connector 13f formed in an L shape is prepared. As an example, an L-shaped connector that is long in the length direction L of the organic device 1 is shown. However, an L-shaped connector that is long in the height direction H of the organic device 1 may be used. A connector may be used. And in the range of the length of the L-shaped connector 13f, a plurality of organic devices 1 are inserted into the connector and sandwiched and supported.

  As shown in the figure, since the extraction electrode 11 is partially exposed, for example, the same-shaped L-shaped connector 13f is covered so as to face each other, or the long-side connector 13a and the short-side connector 13b shown in FIG. What is necessary is just to coat | cover in combination (not shown).

  Since the anode and cathode of each extraction electrode 11 are in pressure contact with the conductive portion 132 of each connector, all organic devices can be electrically connected simultaneously. Further, since the conductive portions 132 of the adjacent connectors are overlapped at the end portions, they can conduct. Thereby, the conductive part 132 on the front side of the transparent substrate 10a takes out the anode (or cathode), the conductive part 132 on the back side of the transparent substrate 10a takes out the cathode (or anode), and the external lead electrode (not shown). ).

  Further, as shown in FIG. 3B, a cross-shaped connector 13g formed in a cross shape is prepared. As an example, a cross-shaped connector 13g having the same length on two sides is shown, but a cross-shaped connector 13g that is long in the height direction H of the organic device 1 may be used, or a cross-shaped connector that is long in the length direction L of the organic device 1. 13g may be sufficient. Then, a plurality of organic devices 1 are inserted into the connector and supported within the range of the length of the cross-shaped connector 13g.

  As shown in the figure, since the extraction electrode 11 is partially exposed, for example, it is covered with an L-shaped connector 13f shown in FIG. 3A, or the long-side connector 13a and the short-side connector 13b shown in FIG. May be coated in combination (not shown).

  Since the anode and cathode of each extraction electrode 11 are in pressure contact with the conductive portion 132 of each connector, all organic devices can be electrically connected simultaneously. Further, since the conductive portions 132 of the adjacent connectors are superposed, conduction can be achieved. Thereby, the conductive part 132 on the front side of the transparent substrate 10a takes out the anode (or cathode), the conductive part 132 on the back side of the transparent substrate 10a takes out the cathode (or anode), and the external lead electrode (not shown). ).

  Note that the cross-shaped connector 13g may pass a jumper wire 16 (not shown) to the end of the cross-shaped connector 13g like the connecting connector 13c shown in FIG. Like the connecting connector 13d shown, the pair of conductive portions 132 facing each other may be electrically connected by extending the jumper wire 16 in the edge cover 131.

  FIG. 4 is an example of a structure in which a pair of connectors 13e is shared between adjacent organic devices and connected in the row direction.

  Specifically, as shown in FIG. 4A, an organic device 1 in which the peripheral end portion of the transparent substrate 10a of the organic device 1 is covered with two types of connectors 13 is prepared. The connectors are a pair of short side connectors 13b and a pair of long side connectors 13e, where the long side connectors 13e are the same as the length in the length direction L of the transparent substrate 10a.

  As shown in FIG. 4B, the pair of long side connectors 13e and 13e are slid rightward or leftward so that the two adjacent organic devices 1 share and connect the connectors 13e. Since the anode and the cathode of each extraction electrode 11 are pressed against the conductive portion 132 of the long side connector 13e, all the organic devices can be electrically connected simultaneously. The conductive portion 132 of the short-side connector 13b can be conducted by simply overlapping the conductive portion 132 of the long-side connector 13a. Thereby, the conductive part 132 on the front side of the transparent substrate 10a takes out the anode (or cathode), the conductive part 132 on the back side of the transparent substrate 10a takes out the cathode (or anode), and the external lead electrode (not shown). ).

  In addition, since the extraction electrode 11 is partially exposed as shown in the drawing, the organic device 1 that is connected and disposed at the left and right ends may be prepared and covered with, for example, a U-shaped connector.

  5A and 5B are general views of the panel unit 2 in which the organic device 1 of the present embodiment is connected in the vertical direction or the horizontal direction. The figure shows the sealing substrate 12 side of the organic device 1 on the top surface.

  Adjacent organic devices 1 are connected via a connector 13. All the organic devices are electrically connected simultaneously by the conductive portion 132 of the connector 13. The outer periphery of the panel unit 2 may be fixed by the frame 3, and here, a case where the panel unit 2 is fixed by the frame is shown.

  The organic device 1 includes at least a photoelectric conversion element 10, an extraction electrode 11, a sealing substrate 12, and a connector 13. In this embodiment, as an example, it functions as an organic solar cell or an organic EL element.

  The panel unit 2 is an assembly of the organic devices 1. As an example, the panel unit is used as a large-sized organic solar battery panel, advertisement, or designed illumination. Although the panel units connected in a matrix are shown, they may be arranged in an arbitrary shape such as a checkered pattern or a house shape or a tree shape.

  The frame 3 is a frame that covers the outer periphery of the panel unit 2. Since the plurality of organic devices are connected, the overall connection strength is inevitably weakened. By covering the outer periphery of the panel unit with a frame, the organic device is less likely to come off and the strength of the panel unit 2 is increased. The frame 3 is made of an insulator or a conductor material and is formed in an arbitrary shape. For example, it can be covered with a metal frame, or the outer periphery can be covered with a woodwork frame to make it look like a shoji. Further, when the non-transparent frame is formed, the wiring such as the external lead-out electrode arranged on the outer peripheral portion of the panel unit can be covered and concealed, so that the complexity is eliminated.

  Note that, as shown in FIG. 5B, a reinforcing frame matched to the outer periphery of the organic device 1 may be used. Compared with the case of FIG. 5A, the connection strength of the center portion of the panel unit is much improved.

  Next, an embodiment of the photoelectric conversion element of the present invention will be described with reference to FIG. Here, the photoelectric conversion element 10 is an organic solar cell. The light incident surface side of sunlight of the organic solar cell is represented on the back surface, and the sealing substrate 12 side is represented on the surface.

  As shown in FIG. 6A, the organic device 1 seals the photoelectric conversion element 10 in the sealing substrate 12, arranges the extraction electrode 11 at the peripheral end of the transparent substrate 10a, and surrounds the periphery of the photoelectric conversion element. The extraction electrode 11 provided at the end is clamped by a connector 13 described in FIG.

  The photoelectric conversion element 10 used in the present invention includes a transparent substrate 10a, a transparent electrode 10b, a hole transport layer 10c, a power generation layer 10d, and a cathode 10e. The transparent electrode 10b and the cathode 10e constitute a pair of electrodes.

  In the transparent substrate 10a, one main surface is used as a sunlight incident surface, and the opposite main surface is used as a support substrate for the transparent electrode 10b. The transparent substrate is an insulating substrate such as a plastic substrate such as polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyester, polyimide resin, epoxy resin, or fluorine resin, or a glass substrate. A flexible film substrate may be used.

  In this embodiment, a transparent glass substrate is used as an example. Specifically, the transparent glass substrate is 100 mm × 100 mm, and its thickness t2 is about 400 μm to 700 μm.

  The transparent electrode 10b is a transparent electrode film formed on almost the entire upper surface of the transparent substrate 10a. As the transparent electrode, indium tin oxide (ITO), indium zinc oxide (IZO), or the like on which indium oxide or the like is deposited is used.

  In the present embodiment, as an example, an ITO film is used, and the peripheral end portion of the transparent substrate 10a is patterned and formed on substantially the entire surface. Specifically, the anode of the photoelectric conversion element is formed in a rectangular shape in a portion excluding the peripheral end portion of the transparent substrate, and the extraction base electrode 11a is formed in the peripheral end portion of the transparent substrate. The film thickness of the ITO film can be arbitrarily determined depending on the current capacity of the organic device.

The hole transport layer 10c is an organic layer that transports holes to the power generation layer, and is formed in a desired shape on the upper surface of the anode of the photoelectric conversion element. Polyethylene geoside thiophene (PEDOT), molybdenum trioxide (MoO ₃ ), or the like is used for the hole transport layer. When PEDOT is used, the film is formed by spin coating. When MoO ₃ is used, the film is formed by vacuum evaporation.

  In the present embodiment, as an example, PEDOT is formed. Specifically, the transparent electrode 10b is formed in a rectangular shape on the upper surface of the anode of the photoelectric conversion element, and the thickness of the hole transport layer is 40 nm.

The power generation layer 10d is a layer that absorbs sunlight to generate power, that is, a photoelectric conversion layer, and is formed on almost the entire upper surface of the hole transport layer 10c. For the photoelectric layer, poly (3-hexylthiophene) (hereinafter abbreviated as P3HT), which is a kind of conductive polymer material, or squarylium derivatives, [60] PCBM ([6,6]- A mixture of phenyl C ₆₁ butyric acid methyl ester) or [70] PCBM ([6,6] -phenyl C ₇₁ butyric acid methyl ester) is used. When a mixture of P3HT and [60] PCBM is used, a solution dissolved in orthodichlorobenzene is applied by spin coating or by vacuum deposition. When a mixture of squarylium derivative and [70] PCMB is used, a solution dissolved in chloroform is formed by coating using a die coater or capillary coater, or by vacuum deposition.

  In the present embodiment, as an example, a mixture of P3HT and [60] PCBM is used. Specifically, it is formed on almost the entire upper surface of the hole transport layer 10c, and the thickness of the power generation layer is 60 nm.

  The cathode 10e is an electrode for collecting holes generated in the power generation layer, and is formed on the upper surface of the power generation layer 10d. Ca, Al, or the like is used for the cathode, and it is formed by vapor deposition, sputtering, coating, or the like. At this time, a transparent solar cell element can be formed by controlling the material used and the film thickness.

  In the present embodiment, as an example, Al is used and formed by vacuum deposition. Specifically, it is formed on the upper surface of the power generation layer 10d, and the thickness of the cathode is 100 nm.

  The cell pattern of the organic solar battery can be variously adapted according to the application object. As an example, as shown in FIG. 6B, a photoelectric conversion element 10 in which 8 cells of 10 mm × 85 mm organic solar cells are arranged is used.

  Next, an embodiment of the connector of the present invention will be described with reference to FIG.

  As shown in FIGS. 7A to 7D, the connector 13 is bonded to an edge cover 131 made of a non-conductive material such as plastic and a surface that sandwiches the photoelectric conversion element inside the edge cover. And a pair of conductive portions 132 provided.

  The edge cover 131 is a cover that sandwiches the transparent substrate 10a of the photoelectric conversion element, and is also a cover that covers the wiring portion. It also serves as a cover that protects the photoelectric conversion element from external damage. Accordingly, it is sufficient that the transparent substrate 10a or the extraction electrode 11 of the photoelectric conversion element is sandwiched and fixed, and it is preferable to use a plastic material.

  Further, the shape of the edge cover is formed in a rectangle having a long side in the length direction of the transparent substrate 10a as shown in FIG. Further, as shown in FIGS. 7B and 7C, the tip is slightly narrowed, and the cross section is formed in a substantially U-shape of Katakana. In addition, a sharp portion may be removed and rounded so as to withstand external pressure, and for example, the cross section may be formed in a substantially C shape (not shown) of English letters.

  The conductive portion 132 is formed of conductive rubber obtained by mixing carbon in resin, and is fixed to the back side of the edge cover 131 with an adhesive or the like. An arbitrary length is appropriately selected as the length of the conductive portion. Electrical connection can be made by press-contacting the extraction electrode 11 of the photoelectric conversion element and the conductive portion 132.

  The adjacent connectors 13 are electrically connected by overlapping the respective conductive portions 132.

  A major feature of the connector of the present invention is that a pair of conductive portions 132 are provided on the holding surface of the connector, so that one becomes an anode and the other becomes a cathode, so that an electrical connection can be easily made only by holding the extraction electrode 11. It is possible to eliminate the need for soldering.

  In addition, since a rubber material is used for the portion in contact with the photoelectric conversion element, there is no risk of damaging the transparent substrate 10a and the extraction electrode 11 due to the clamping pressure, and the cushioning property prevents the displacement.

  FIG. 7D shows a cross-sectional view of an organic device in which a photoelectric conversion element 10 in which eight cells of an organic solar battery 10 of 10 mm × 85 mm are arranged is sandwiched by connectors 13. The cross section of the organic solar cell corresponds to the line cc in FIG.

  Specifically, the organic solar cell 10 uses a transparent glass substrate of 100 mm × 100 mm as the transparent substrate 10a, and the thickness t2 thereof is 400 μm. The transparent electrode 10b is patterned in advance, and the anode portion of the organic solar battery of each cell is formed in a rectangular shape of 10 mm × 85 mm, and anode and cathode extraction base electrodes 11a are formed at both ends. The hole transport layer 10c and the power generation layer 10d are each formed in a rectangular shape of 10 mm × 85 mm. The cathode 10e is formed in a 10 mm × 85 mm rectangular shape, and is electrically connected to the cathode of the extraction base electrode 11a. The thickness t1 of the organic device 1 is 1 mm.

  Further, the anode and the cathode of the extraction base electrode 11a are drawn around the back surface of the transparent substrate 10a by the extraction contact electrode 11b.

  Since the extraction contact electrode 11b always extends from the front surface to the back surface of the transparent substrate 10a, the anode and the cathode are short-circuited by the pair of conductive portions 132 when sandwiched by the connector 13. In order to prevent a short circuit, all the cathodes on the surface of the transparent substrate 10a are covered with the insulating member 15, and only the anode on the surface of the transparent substrate 10a is in electrical contact with the conductive portion 132 of the connector 13 on the surface side of the transparent substrate 10a. Therefore, the conductive portion 132 on the surface side of the transparent substrate 10a takes out the anode and is routed to the external lead-out electrode.

  Further, the anode on the back surface of the transparent substrate 10a is covered with the insulating member 15, and only the cathode on the back surface of the transparent substrate 10a is in electrical contact with the conductive portion 132 of the connector 13 on the back surface side of the transparent substrate 10a. Therefore, the conductive portion 132 on the back surface side of the transparent substrate 10a takes out the cathode and is routed to the external lead-out electrode.

  By arranging 8 cells of this 10 mm × 85 mm organic solar battery side by side, a plurality of anodes and cathodes of the extraction contact electrode 11b are continuously provided alternately. In the drawing, the portion where the extraction contact electrode 11b is exposed (shaded portion) is the anode, and the portion where the insulating member 15 is exposed (blackened portion) is the cathode. Thus, by providing a plurality of electrodes, when electrically connected by the connector 13, the same effect as in the case of parallel connection can be obtained. That is, the electrical resistance value of the transparent electrode 10b in the photoelectric conversion element surface can be minimized, and the extraction voltage and current can be increased. Therefore, since the photoelectric conversion amount increases, an increase in the luminance factor can be realized in the case of a low-power organic solar cell.

  In addition, since the connection is multi-point, even if a certain connection part is deteriorated and a failure or contact failure occurs, reliable electrical connection can be realized at the remaining normal connection parts. As a result, the probability of failure due to deterioration of the connection site is greatly reduced.

  FIGS. 8-10 is an example of the structure which fits and connects the connectors 13 of the adjacent organic device 1. FIG. In the present embodiment, there will be described three types of fitting structures in which the connecting portion is a slide type (FIG. 8), an uneven type (FIG. 9) and a hook type (FIG. 10). Here, the organic device is omitted and only the connector is shown in a simplified manner.

  FIG. 8 shows a fitting structure of a slide type connector. As an example, FIGS. 8A to 8B show a slide type-slit type, and FIGS. 8C to 8E show a slide type-uneven type.

  In the slide type-slit type, as shown in the perspective view of FIG. 8A, the slit S is formed at an arbitrary position on the side opposite to the conductive portion 132 of the edge cover 131. The length of the slit S can be arbitrarily selected, and the longer the slit S, the higher the fitting strength. Then, as shown in FIG. 8B, the slit S portion is aligned and slid up and down to be securely fitted.

  As shown in the plan views of FIGS. 8C and 8D, the slide mold-concave pattern has a concave slide fitting portion So at an arbitrary position on the side opposite to the conductive portion 132 of the edge cover 131, and its A convex sliding fitting portion St is formed below. And as shown in FIG.8 (E), after aligning and fitting the uneven | corrugated | grooved part of the fitting part for a slide, respectively, it slides up and down and it is made to fit reliably.

  FIG. 9 shows an example of the fitting structure of the concavo-convex connector.

  As shown in the plan views of FIGS. 9A and 9B, the concave portion Po is formed at an arbitrary position on the opposite side of the conductive portion 132 of the edge cover 131, and the convex portion Pt is formed below the concave portion Po. And as shown in FIG.9 (C), the uneven | corrugated | grooved part which opposes each is aligned, A connector is moved to a horizontal direction and it is made to fit.

  FIG. 10 shows an example of a hook-type connector fitting structure.

  As shown in the plan views of FIGS. 10A and 10B, a hook recess Fo is formed at an arbitrary position on the opposite side of the conductive portion 132 of the edge cover 131, and a hook portion Ft is formed therebelow. Then, as shown in FIG. 10 (C), the opposing hook recess Fo and hook portion Ft are aligned and hooked together.

  In addition, although the connector 13 of the fitting structure of FIGS. 8-10 showed the case where a fitting part was provided in the both ends of a connector, it is not restricted to both ends of a connector, for example, arbitrary places, such as a center part of a connector, are arbitrary. The number of fitting portions may be formed. Further, the conductive portion 132 on the front side of the transparent substrate 10a takes out the anode (or cathode), and the conductive portion 132 on the back side of the transparent substrate 10a serves as a double-sided electrode for taking out the cathode (or anode). As described above, the external lead-out electrode 14 may be formed as a single-sided electrode that is drawn from either the front side or the back side of the transparent substrate by being routed through the edge cover 131 of the connector.

  Further, as described above, the electrode routed through the edge cover 131 of the connector is provided with a pad that can be soldered on the outside of the edge cover 131 and protrudes from the edge cover at an arbitrary position. A metal foil or the like provided between 132 may be extended and taken out. For example, in the case of the concave-convex connector fitting structure shown in FIG. 9, the back electrode extraction portion is formed on a part of the flat surface of the recess Po, and the front electrode extraction portion is formed on the opposing projection Pt. By forming, the connectors to be connected can be fitted and connected to each other, and the connectors can be conducted.

  The feature of the present invention is that the organic device 1 capable of electrically connecting the extraction part 11 of the photoelectric conversion element with the connector 13 and electrically connecting the conductive part 132 of the connector to the anode 11a and the cathode 11b of the extraction electrode can be connected. Thereby, a plurality of organic devices can be connected in an arbitrary shape and used as an electronic advertisement or design illumination.

DESCRIPTION OF SYMBOLS 1 Organic device 2 Panel unit 3 Frame 10 Photoelectric conversion element 10a Transparent substrate 10b Transparent electrode 10c Hole transport layer 10d Power generation layer 10e Cathode 11 Extraction electrode 12 Sealing substrate 13 Connector 131 Edge cover 132 Conductive part 13a, 13e Long side connector 13b Short side connectors 13c, 13d Connecting connector 13f L-shaped connector 13g Cross-shaped connector 14 External lead-out electrode 15 Insulating member 16 Jumper wire S Slit So, St Slide fitting portion Po Concavity Pt Convex portion Fo Hook concavity Ft Hook portion

Claims (7)

A transparent substrate;
A transparent electrode serving as an anode provided on the transparent substrate;
A cathode disposed opposite to the transparent electrode;
An organic device comprising an organic semiconductor layer laminated between the anode and the cathode,
An extraction electrode provided at a peripheral end of the transparent substrate;
A sealing substrate for sealing the organic device;
An edge cover made of an insulating material, and a connector having a conductive portion of a pair of conductive materials provided inside the edge cover;
The connector is formed longer than one side of the transparent substrate, or a plurality of the connectors are arranged in series, and the extraction electrodes of each of the plurality of transparent substrates are integrated with each other in the row direction, and the extraction electrode and An electrode extraction structure for an organic device, wherein the electrode is extracted while being brought into pressure contact with the conductive portion.   2. The organic device electrode extraction structure according to claim 1, wherein a plurality of the extraction electrodes are continuously formed in a peripheral direction of the transparent substrate in a length direction of the transparent substrate.   The extraction electrode is routed to the back surface of the transparent substrate, the anode is exposed on the surface of the transparent substrate, the anode is extracted from the conductive portion pressed against the surface of the transparent substrate of the connector, and the cathode is The electrode extraction structure for an organic device according to claim 1, wherein the cathode is extracted from the conductive portion exposed to the back surface of the transparent substrate.   In the connector, the edge cover is provided integrally on the upper side and the lower side, and the conductive portion is provided on each of the connectors. The upper edge cover holds the transparent substrate in the upper row, and the lower edge. 2. The electrode is taken out by sandwiching the transparent substrates in the lower row with the cover and bringing the extraction electrodes and the conductive portions of the transparent substrates in adjacent rows into pressure contact with each other. The electrode extraction structure of the organic device as described in 2.   2. The electrode extraction structure for an organic device according to claim 1, wherein the transparent substrate is sandwiched by the short connector that fills a space between the side edges of each of the transparent substrates integrated with the connector.   2. The electrode extraction structure for an organic device according to claim 1, wherein the adjacent connector is provided with a connecting portion of a slide type, an uneven type or a hook type, and the adjacent connectors are integrated. 2. The organic device electrode extraction structure according to claim 1, wherein the outer periphery of the connector is reinforced by a frame.

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