JP2008034668A - Organic solar battery, module thereof, and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an organic solar battery and an organic solar battery module which can sharply improve a light absorption coefficient through an organic semiconductor layer, and can achieve high power generation efficiency, and to provide a manufacturing method with high productivity based on continuous manufacturing processes. <P>SOLUTION: The organic solar battery 10 has the structure of a filament body of which the axial direction is sufficiently longer than an aperture length. A light guide 11 makes light incident from the upper end and makes the light incident into the inside incident and absorb onto a solar battery layer composed of a p-type organic semiconductor 13 and an n-type organic semiconductor 14. Since a reflection film 15 is formed on the outer periphery of the solar battery layer, light passed without being absorbed into the solar battery layer is reflected by the reflection film 15, and made incident and absorbed into the solar battery layer again or returned to the light guide 11 without being absorbed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an organic solar cell using an organic semiconductor and a manufacturing method thereof.

  Silicon solar cells and organic solar cells are known as solar cells that generate power by photoelectric conversion. Organic solar cells have a larger extinction coefficient than silicon-based solar cells, and have attracted attention due to the ease of controlling the absorption wavelength. However, it is necessary to reduce the thickness of the organic semiconductor used in the organic solar cell, and there is a problem that the amount of light that can be absorbed per unit area cannot be increased.

  As techniques for improving the above problems, for example, techniques described in Patent Documents 1 to 3 are known. These are intended to increase the amount of light absorbed per unit area by devising the configuration of the organic solar cell layer.

  A schematic configuration of the organic solar battery described in Patent Document 1 is shown in FIG. As shown in the figure, the organic solar cell 111 is installed such that its surface is inclined with respect to the incident light beam 112. By irradiating the incident light beam 112 with an inclination to the surface of the solar cell 111, the passage distance of light passing near the interface between the P layer 113 and the N layer 114 involved in power generation can be increased. As a result, the absorption efficiency of incident light is increased and the power generation efficiency is improved.

  An organic solar cell 121 described in Patent Document 2 shown in FIG. 11 includes a PN junction 124 including a P-type organic semiconductor layer 122 and an N-type organic semiconductor layer 123 as a photovoltaic layer, and the PN junction 124. Are formed in a direction perpendicular to the light irradiation surface. Since the PN junction 124 is formed perpendicular to the light irradiation surface, in the vicinity of the PN junction 124, all the light that has entered the organic semiconductor layer is absorbed by the inactive layer, that is, lost due to the masking effect. It is possible to contribute to the generation of photocurrent without.

Furthermore, the organic solar cell 131 described in Patent Document 3 shown in FIG. 12 has a plurality of linear organic semiconductor layers 132 arranged in parallel with each other at a predetermined interval in a single plane. The common electrode layer 133 and the transparent common electrode layer 134 are provided as full-surface electrodes. Furthermore, by providing the electrode 135 and the electrode 136 on both side surfaces of each organic semiconductor layer 132, the distance from the PN junction to the electrode in the organic semiconductor layer 132 can be kept short. Can be increased.
JP 7-66439 A JP-A-2005-11841 JP 2005-175131 A

However, conventional organic solar cells do not have sufficient power generation efficiency, and further improvements in power generation efficiency are required to put organic solar cells into practical use in the future.
In any of the organic solar cells of Patent Documents 1 to 3, although the light absorption region in the organic semiconductor layer is improved compared to the conventional one, power generation is performed only in a part of the organic semiconductor layer. Absent. Moreover, a complicated process is required for manufacturing each organic solar cell.

  In addition, the above three inventions require the use of a large amount of expensive organic solar cell materials, and there is a problem that running costs are high. In addition, low molecular weight materials with a relatively long lifetime are currently used for the formation of organic semiconductors, but the productivity is low due to batch processing, and it is necessary to increase the size of expensive vacuum equipment in order to increase productivity. There is a problem that a large capital investment is required. Furthermore, since the organic solar cell of the nanostructure to be used must be laminated | stacked only for a required area, manufacturing cost and manufacturing time are taken significantly, and it is unsuitable for a large area use.

  Accordingly, the present invention has been made to solve these problems, and can achieve a high power generation efficiency by greatly improving the light absorption efficiency of the organic semiconductor layer, and is a relatively inexpensive organic solar cell and organic solar cell. An object is to provide a module and a manufacturing method with high productivity by a continuous manufacturing process.

  The first aspect of the organic solar cell of the present invention is a light guide, an organic solar cell layer comprising a cathode, an anode, and an organic semiconductor layer in contact with at least a part of the surface of the light guide, and at least the light guide And a reflecting means provided at a position facing the organic solar cell layer.

  A 2nd aspect is an organic solar cell characterized by providing a reflection means in the surface opposite to the surface which contact | connects the said light guide part of the said organic solar cell layer.

  A 3rd aspect is an organic solar cell provided with the said organic solar cell layer between the said reflection means and the said light guide part.

  A 4th aspect is an organic solar cell characterized by the said solar cell layer being formed in order of the transparent electrode, the semiconductor layer of the solar cell, and the electrode in the light guide part surface.

  A fifth aspect is an organic solar cell characterized in that the electrode is formed so as to cover the semiconductor layer and also serves as a reflection means.

  A 6th aspect is an organic solar cell characterized by the said light guide part being formed with glass or transparent resin.

  A seventh aspect is an organic solar cell characterized in that the light guide part of the light guide member has a cross-sectional shape of a circle, an ellipse, a rectangle, or a shape close to a rectangle.

  An eighth aspect is an organic solar cell, wherein the light guide is a linear body.

  A ninth aspect is an organic solar cell characterized in that the ratio of the short axis that defines the opening of the light guide section to the length in the long axis direction is 1: 5 or more.

  A tenth aspect is an organic solar cell characterized in that means having a refractive index different from that of the light guide part is attached to the opening end of the light guide part.

  An eleventh aspect is an organic solar cell, characterized in that means for adjusting a reflection angle is attached to the end of the light guide.

  The first aspect of the organic solar cell module of the present invention uses a light guide member of a linear body, uses a light guide solar cell in which a solar cell is formed on the light guide member, and has an opening for taking in incident light. A plurality of the light-guiding solar cells are aligned with the long axis direction of the light-guiding member aligned with the position of the opening, and each light-guiding solar cell is wired. is there.

  In the first aspect of the method for producing an organic solar cell of the present invention, at least the transparent electrode, the organic solar cell layer, and the electrode are formed on the outer periphery of the light guide portion of the line / strip, and the reflective film or seal is formed on the outer periphery. A method of manufacturing an organic solar cell, characterized in that a film or both films are formed.

  As described above, according to the present invention, it is possible to efficiently absorb light in the organic solar cell layer by confining the light between the light guide portion and the reflection portion, and the conversion efficiency is improved. High organic solar cells and organic solar cell modules can be provided.

  Moreover, according to the manufacturing method of the organic solar cell of this invention, since it becomes possible to form an organic solar cell layer continuously in the light guide part of a filament, productivity of an organic solar cell is improved significantly. be able to.

  Furthermore, since the light guide portion can be widely taken with respect to the light incident portion, the number of expensive organic solar cell layers can be significantly reduced as compared with the conventional method, so that the manufacturing cost can be greatly reduced. In addition, the light guide portion can effectively guide the light energy incident on the module to the solar cell portion with very little transmission loss, so that the utilization efficiency can be improved as compared with the conventional method.

  In addition, materials such as quartz, multi-component glass, and transparent resin that are used as the light guide section normally absorb ultraviolet rays, so that harmful ultraviolet rays can be removed during wave guiding. Furthermore, the average energy density of the incident light of a solar cell part can be adjusted by designing the area of the light-receiving part of a solar cell freely about the width | variety and thickness of a light guide, and a condensing surface shape. In the case where the lifetime is to be emphasized, the average energy density can be reduced by increasing the width and thickness and increasing the diffusion after condensing.

  An organic solar cell, an organic solar cell module, and a manufacturing method thereof according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. In addition, about each structural part which has the same function, the same code | symbol is attached | subjected and shown for simplification of illustration and description.

  1st Embodiment of the organic solar cell of this invention is described using FIG. FIG. 1 is a cross-sectional view showing the structure of the organic solar cell 10 of the present embodiment. The organic solar cell 10 has a structure in which a solar cell layer is formed on the outer periphery of the light guide unit 11. The transparent conductive film 12, the P-type organic semiconductor 13, and the N-type organic semiconductor are sequentially formed on the outer periphery of the light guide unit 11. 14 and a reflection film 15 is formed on the outer periphery thereof. The P-type and N-type organic semiconductor layers may be reversed, or may have a structure used in a silicon solar cell, a thin-film silicon solar cell, or the like.

The organic solar cell 10 of the present embodiment has a linear structure in which the light guide axis direction is sufficiently long with respect to the opening length (diameter and thickness). The light guide unit 11 causes light to be incident from the upper end (opening) thereof, and the light incident on the light guide unit 11 is incident on and absorbed by the solar cell layer formed of the P-type organic semiconductor 13 and the N-type organic semiconductor 14. I have to. In addition, since the reflective film 15 that also serves as the cathode is formed on the outer periphery of the solar cell layer, the light that has passed without being absorbed by the solar cell layer is reflected by the reflective film 15 and again enters the solar cell layer. It is incident and absorbed, or returns to the light guide unit 11 without being absorbed.
Of course, a cathode and a reflective film (a metal having a high reflectance such as aluminum is preferable) may be provided separately. In this case, the cathode should be as thin as possible and thinner than the solar cell layer. Preferably it is 20 nm or less.

  As described above, the organic solar cell 10 of the present embodiment has the light guide unit 11 until light incident on the light guide unit 11 is absorbed by the solar cell layer including the P-type organic semiconductor 13 and the N-type organic semiconductor 14. And the reflective film 15. By making the organic solar cell 10 have the above-described structure, it is possible to increase the amount of light absorbed by the solar cell layer. The light guide part 11 should just be what lets light pass, and can be formed with quartz, multicomponent glass, or transparent resin. Or it is also possible to set it as the light guide space which does not use any member. When the light guide space is used, it is preferable to cap so that liquids such as dust and rainwater do not enter.

In the organic solar cell 10 of the present embodiment, the transparent conductive film 12 and the reflective film 15 constitute an electrode. The transparent conductive film 12 uses a transparent electrode member so that light from the light guide portion 11 can reach the solar cell layer. For example, ITO (indium tin oxide), ZnO (zinc oxide), SnO2 (tin oxide). It can be set as a transparent electrode. Further, as the reflective film 15, a metal electrode such as aluminum, gold, silver gold, and titanium that absorbs light and has high reflection can be used. Moreover, you may use the electrode of multilayer structure of those metals, or the multilayer structure of those metals, another metal, and conductive oxides and conductive organic substances like the said transparent electrode material as a reflecting film. .
Furthermore, it is preferable to form a sealing film for protecting the organic solar cell from moisture and oxygen on the outer layer of the reflective film. What is necessary is just to apply what is used by the conventional invention for the method of sealing.

The light guide member may have a strip-like line state that is long in the direction perpendicular to the paper surface of FIG. In this case, the opening becomes one end face of the linear body. The shape of the end surface is a concave shape, a convex shape, a lens shape, or the like in consideration of ease of light capture, directivity of incident light, and omnidirectionality.
The length of the linear body is the length of the module, and the length of the end face, that is, the thickness of the linear body is the width of the opening. The width of the linear body is the length of the light guide. By taking the anode at one end and the cathode at the other end, it is possible to easily connect wiring between solar cells when modularizing. FIG. 7 shows a cell cross-sectional structure diagram.

  In the organic solar cell 10 having the structure described above, the conversion efficiency of photoelectric conversion will be described below. In organic solar cells, it is known that the thickness of the organic layer forming the solar cell (hereinafter referred to as the organic layer thickness) greatly affects the conversion efficiency of photoelectric conversion. As an example, the conversion efficiency of the organic solar cell 101 having the conventional structure shown in FIG. 2 will be described. An organic solar cell 101 shown in FIG. 2 has a structure including a transparent conductive film 102, a P-type organic semiconductor 103, an N-type organic semiconductor 104, a conductive film 105, and a glass substrate 106 in order from the light incident side. . The glass substrate 106 has a size of width 1 mm × thickness 0.1 mm × length 10 mm.

  FIG. 3 shows an example of the relationship between the conversion efficiency and the organic layer thickness of the organic solar cell 101 having the conventional structure shown in FIG. FIG. 3 is a graph showing the dependence of the conversion efficiency of the organic solar cell 101 on the organic layer thickness when the vertical axis is the conversion efficiency and the horizontal axis is the organic layer thickness. As shown in the figure, it can be seen that the conversion efficiency of the organic solar cell 101 having the conventional structure decreases as the thickness of the organic layer increases. This is presumably because the organic layer has a high electric resistance, so that the efficiency of taking out electricity rapidly deteriorates as the organic layer becomes thicker.

  On the other hand, FIG. 4 shows an example of the dependency of the transmittance in the organic layer of the organic solar battery 101 on the organic layer thickness in comparison with the conversion efficiency. From the figure, the transmittance also decreases as the organic layer thickness increases, and the absorption efficiency improves as opposed to the conversion efficiency.

  From the results of FIGS. 3 and 4, it can be seen that the conversion efficiency of the organic solar cell 101 increases as the thickness of the organic layer decreases. On the other hand, since the transmittance increases as the thickness of the organic layer decreases, it can be seen that the rate of transmission and loss without being absorbed by the organic layer also increases.

  Therefore, the organic solar cell of the present invention is configured to include a reflecting member in order to reduce the thickness of the organic layer while returning light transmitted without being absorbed by the organic layer to the organic layer again. Also in the organic solar cell 10 of the embodiment shown in FIG. 1, a reflective film 15 that also serves as an electrode as a reflective member is provided on the outer periphery of an organic layer composed of a P-type organic semiconductor 13 and an N-type organic semiconductor 14.

  An example of the conversion efficiency of the organic solar cell 10 is shown in FIG. In the figure, the conversion efficiency of the organic solar cell 101 having a conventional structure is also shown for comparison. From the figure, it can be seen that the conversion efficiency of the organic solar cell 10 of the present embodiment is greatly improved over the organic solar cell 101 having the conventional structure, particularly when the organic layer thickness is small. This is because, in the organic solar cell 10 of the present embodiment, light is confined between the light guide portion 11 and the reflective film 15 so that light is efficiently absorbed by the organic layer (hereinafter referred to as light). This is because a confinement effect is obtained.

  The light confinement effect can be defined as follows, for example.

ここで、ｎ_ｐは従来構造の有機太陽電池１０１の変換効率を示し、ｎ_ｆは本実施形態の有機太陽電池１０の変換効率を示している。但し、ｎ_ｆは導光部１１と反射膜１５との間に閉じ込められて有機層を３回通過するものまでを含めた変換効率を示している。

Here, n _p indicates the conversion efficiency of the organic solar cell 101 having the conventional structure, and n _f indicates the conversion efficiency of the organic solar cell 10 of the present embodiment. However, n _f indicates the conversion efficiency including the one confined between the light guide 11 and the reflective film 15 and passing through the organic layer three times.

In FIG. 5, the right vertical axis indicates the light confinement effect of the above equation, and the light confinement effect shown in Equation 1 is 72% when the organic layer thickness is 10 nm. That is, it can be seen that the conversion efficiency of the organic solar cell 10 of the present embodiment is improved by 72% compared to the organic solar cell 101 having the conventional structure.
Although the light confinement effect depends on the organic semiconductor material used, the effect appears from a thickness of 50 nm or less. Preferably, an effect of about 10% or more can be obtained by setting the thickness to 40 nm or less.

  Another embodiment of the organic solar cell of the present invention will be described with reference to FIG. The organic solar cell 30 according to the embodiment shown in FIG. 6A includes a transparent conductive film 32, a P-type organic semiconductor 33, an N-type organic semiconductor 34, and a conductive film 35 on one surface of a flat light guide 31. An organic solar cell layer is formed, and a reflective film 36 is formed on the other surface of the light guide portion 31 facing the organic solar cell layer.

  In the organic solar cell 30 of the present embodiment, light that enters the light guide portion 31 and does not enter the organic solar cell layer is reflected by the reflective film 36 and is incident on the organic solar cell layer. Further, the light that is not absorbed by the organic solar cell layer and returns to the light guide unit 31 is also reflected by the reflective film 36 and is incident on the organic solar cell layer again. Thereby, an organic solar cell with high conversion efficiency can be realized.

  The organic solar cell 40 of the embodiment shown in FIG. 6B is configured to form a reflective film 41 on the back surface of the organic solar cell layer. However, in place of the conductive film 35 provided as an electrode, the reflective film 41 also serves as an electrode. In the organic solar cell 40 formed in this way, the light transmitted without being absorbed by the organic solar cell layer is reflected by the reflective film 41 and returned to the organic solar cell layer again. That is, as in the first embodiment shown in FIG. 1, by confining light between the reflective film 36 and the reflective film 41, the conversion efficiency can be further increased.

  The organic solar cell 42 of the embodiment shown in FIG. 6C has an inner surface of the reflective film 36 on the other surface of the light guide portion 31 on which the reflective film 36 was formed in FIGS. 6A and 6B. An organic solar cell layer is formed on the substrate. However, instead of the reflective film 36, a reflective film 41 that also serves as an electrode is used. In the organic solar cell 42 thus configured, the conversion efficiency can be further increased by expanding the range of the organic solar cell layer.

In any of the embodiments shown in FIGS. 6A to 6C, quartz, multicomponent glass, or transparent resin that absorbs ultraviolet rays and transmits visible light, near infrared rays, and infrared rays is received in the flat light guide 31. Can be used. A material that absorbs infrared rays may be used.
In any of the organic solar cells according to any of the above embodiments, the length of the light guide portion 11 or 31 is preferably 5 times or more and 50 times or less the opening length. By making the length in the light guide direction (axial direction) longer than the opening length of the light guide portion 11 or 31, an organic solar cell layer having a larger area in the light guide direction than the opening area can be formed. In addition, the light confined in the light guide 11 or 31 can be efficiently absorbed by the organic solar cell layer.

  Further, since the ultraviolet light is absorbed by the light while passing through the light guide portion 11 or 31, an effect that the organic solar cell layer can be prevented from being deteriorated by receiving the ultraviolet light is also obtained. Furthermore, it can be expected that the average energy density of the incident light of the organic solar cell layer can be reduced and the lifetime of the solar cell can be improved.

  Even if it is larger than 50 times, the effect of absorption hardly increases. Further, the material cost and the raw material cost are increased, and a substantial effect cannot be obtained. Furthermore, the solar cell module becomes larger, the weight becomes heavier, and transportation costs and construction costs increase, which is not preferable.

  Still another embodiment of the organic solar cell of the present invention will be described with reference to FIG. The organic solar cells 51 to 54 of the present embodiment shown in FIGS. 7A to 7D are all light guide portions of a striated body, similarly to the organic solar cell 10 of the first embodiment shown in FIG. A transparent conductive film 56, a P-type organic semiconductor 57, an N-type organic semiconductor 58, and a reflective film 59 are sequentially formed on the outer periphery of 55.

In the organic solar cell 51 shown in FIG. 7A, in addition to the above structure, an irregular reflection seal 63 is affixed to a terminal portion 62 opposite to the opening 61 through which light from the light guide portion 55 enters. By providing the irregular reflection seal 63, the light that has reached the end portion 62 without being absorbed by the organic solar cell layer composed of the P-type organic semiconductor 57 and the N-type organic semiconductor 58 is irregularly reflected by the irregular reflection seal 63 and again is the light guide section. It returns to 55 and is absorbed by the organic solar cell layer.
In the organic solar cell 52 shown in FIG. 7B, a member 64 having a refractive index different from that of the light guide unit 55 is provided in the opening 61. The member 64 preferably has, for example, a light condensing structure that forms a lens, whereby the light incident on the member 64 can be efficiently absorbed by the organic solar cell layer.

In any of the organic solar cells 51 to 54 shown in FIGS. 7A to 7C, the organic solar cell layer can be efficiently absorbed by appropriately dispersing the light incident inside the light guide portion 55. Therefore, it is possible to provide an organic solar cell with high conversion efficiency.
In addition, by making the shape of the opening a convex lens shape, the angle dependency with respect to the incident light from the radial direction of the lens can be reduced, which is effective for a light source that moves like the sun. . (Fig. 7 (C))

  Regardless of the embodiment of the organic solar cell of the present invention described above, the solar cell module of the present invention is configured by arranging a plurality of organic solar cells so that the openings are in the same direction. be able to.

  The manufacturing method of the organic solar cell of this invention is demonstrated below using drawing. In the manufacturing method of the organic solar cell of this invention, it has the process of forming an organic solar cell layer in the outer periphery of the light guide part of a filament, and also forming a reflection layer in the outer periphery.

  An embodiment of the method for producing an organic solar cell of the present invention is shown in FIG. In the manufacturing method shown in FIG. 8, the fiber 71 with ITO in which ITO was formed in the outer periphery of the fiber formed with glass or transparent resin is used. The fiber with ITO 71 can be manufactured, for example, by forming an ITO film at the time of fiber manufacture.

  In the example shown in FIG. 8, a P-type organic semiconductor ejection part 72, an N-type organic semiconductor ejection part 73, and a metal nanoparticle paste ejection part 74 are sequentially arranged around the fiber 71 with ITO from the left side. In the manufacturing method of this example, the P-type organic semiconductor, the N-type organic semiconductor, and the metal nanoparticle paste were ejected from the ejection portions 72 to 74 while moving the ITO-attached fiber 71 at a constant speed in the right direction. An ink jet method that blows onto the ITO-attached fiber 71 or a die coating method that coats a liquid material that has been pressurized and fed from a slit-shaped die is employed. Thus, a P-type organic semiconductor film is formed on the outer periphery of the ITO-attached fiber 71, an N-type organic semiconductor film is formed thereon, and a metal film is further formed thereon.

  You may produce using the vacuum process currently used most widely. The P-type organic semiconductor jet part 72 and the N-type organic semiconductor jet part 73 can be vacuum-deposited, and the cathode material can be an electron beam vapor deposition or vapor deposition, or an evaporation source such as a K cell.

  According to the manufacturing method of the ink jet method and the die coating method of the present embodiment, it becomes easy to manufacture a large number of organic solar cells continuously by adopting the configuration shown in FIG.

  Another embodiment of the method for producing an organic solar cell of the present invention is shown in FIG. Also in the manufacturing method of the die coating system shown in the figure, an organic solar cell is continuously manufactured while moving the ITO-attached fiber 71 at a constant speed in a predetermined direction. FIG. 9 shows an example in which the ITO-attached fiber 71 is moved downward. A P-type organic semiconductor coating portion 81 is arranged on the upstream side, and an N-type organic semiconductor coating portion 82 is placed on the downstream side at a predetermined distance. Is arranged. The coating units 81 and 82 are formed of a coating die, a coating tank, and pressure control means (not shown), and perform coating by supplying a coating material at a predetermined pressure to the coating die according to the moving speed of the linear body. The thickness of the coating material is determined by the size of the exit portion (die portion) of the coating die. The final coating thickness when the raw material is diluted using a solvent as the coating material can be determined by the concentration of the raw material and the die size of the coating die.

The manufacturing method of this embodiment shown in FIG. 9 is such that when the ITO-attached fiber 71 passes through the P-type organic semiconductor coating portion 81, the P-type organic semiconductor is coated, and when it passes through the N-type organic semiconductor coating portion 82, P A lip method (wet on wet or two-layer coating method) in which an N-type organic semiconductor is coated on a type organic semiconductor film. Even in the lip system of this embodiment, it becomes easy to manufacture a large number of organic solar cells continuously.
As an example, in a fiber substrate having a thickness of 0.1 mm × width of 1 mm × length of 0.3 m, as shown in FIG. 13, ITO (100 nm) + organic layer (20-100 nm, step + 10 nm) + AL on the left and right sides of the fiber substrate (100 nm) was deposited.

  In addition, the description in this Embodiment shows an example of the organic solar cell which concerns on this invention, an organic solar cell module, and its manufacturing method, It is not limited to this. The detailed configuration and detailed operation of the organic solar cell, the organic solar cell module, and the manufacturing method thereof in the present embodiment can be changed as appropriate without departing from the spirit of the present invention.

It is sectional drawing which shows the structure of the organic solar cell of embodiment of this invention. It is sectional drawing of the organic solar cell of a conventional structure. It is a graph which shows the organic layer film thickness dependence of the conversion efficiency of the conventional organic solar cell. It is a graph which shows the organic layer film thickness dependence of the transmittance | permeability of the conventional organic solar cell. It is a graph which shows one example of the conversion efficiency of the organic solar cell of this invention. It is sectional drawing which shows the structure of another embodiment of the organic solar cell of this invention. It is sectional drawing which shows the structure of another embodiment of the organic solar cell of this invention. It is a schematic block diagram which shows the Example of the manufacturing method of the organic solar cell of this invention. It is a schematic block diagram which shows another Example of the manufacturing method of the organic solar cell of this invention. It is sectional drawing which shows schematic structure of the conventional organic solar cell. It is a perspective view which shows schematic structure of another conventional organic solar cell. It is sectional drawing which shows schematic structure of another conventional organic solar cell. It is an Example of the organic solar cell of this invention.

Explanation of symbols

10, 30, 40, 51, 52, 53, 54, 101, 111, 121, 131 ... organic solar cells 11, 31, 55 ... light guide parts 12, 32, 56, 102 ... transparent conductive Parts 13, 33, 57, 103, 113, 122... P-type organic semiconductors 14, 34, 58, 104, 114, 123... N-type organic semiconductors 15, 36, 59. 105 ... conductive film 106 ... glass substrate 61 ... opening 62 ... termination 63 ... irregular reflection seals 64, 65 ... member 66 ... diagonal cut terminal 71 ... ITO Attached fiber 72 ... P-type organic semiconductor ejection part 73 ... N-type organic semiconductor ejection part 74 ... Metal nanoparticle paste ejection part 74
81... P-type organic semiconductor coating portion 82... N-type organic semiconductor coating portion 112... Incident light beam 113... P layer 114. Layer 133 ... Common electrode layer 143 ... Transparent common electrode layer 135, 136 ... Electrode

Claims (13)

A light guide;
An organic solar cell layer comprising a cathode, an anode, and an organic semiconductor layer in contact with at least a portion of the surface of the light guide;
Reflecting means provided at a position facing at least the organic solar cell layer of the light guide unit. An organic solar cell comprising: The organic solar cell according to claim 1, further comprising a reflecting unit on a surface opposite to a surface in contact with the light guide portion of the organic solar cell layer. The organic solar cell according to claim 1, wherein the organic solar cell layer is provided between the reflecting means and the light guide unit.   The organic solar cell according to claim 1, wherein the solar cell layer is formed in the order of a transparent electrode, a semiconductor layer of the solar cell, and an electrode on the surface of the light guide portion.   The organic solar cell according to claim 1 or 4, wherein the electrode is formed so as to cover the semiconductor layer and also serves as a reflection means. The organic solar cell according to claim 1, wherein the light guide portion is made of glass or transparent resin. 7. The organic solar cell according to claim 1, wherein a cross-sectional shape of the light guide portion of the light guide member is a circle, an ellipse, a rectangle, or a shape close to a rectangle. The organic solar cell according to claim 1, wherein the light guide member is a linear body. 9. The organic solar cell according to claim 1, wherein a ratio of a minor axis to a major axis length that defines an opening of the light guide unit is 1: 5 or more. The organic solar cell according to any one of claims 1 to 9, wherein a member having a refractive index different from that of the light guide portion is attached to an opening end of the light guide portion. The organic solar cell according to any one of claims 1 to 10, wherein means for adjusting a reflection angle is attached to an end of the light guide unit. Using a light guide member of a linear body, using a light guide solar cell in which a solar cell is formed on the light guide member, having an opening for taking incident light, and guiding the plurality of light guide solar cells to the light guide member A solar cell module, wherein a plurality of light guide solar cells are wired, with a plurality of the long axis directions aligned with the positions of the openings. An organic sun characterized in that it is formed in the order of at least a transparent electrode, an organic solar cell layer, and an electrode on the outer periphery of the light guide part of the wire / strip, and further, a reflective film or a sealing film, or both films are formed on the outer periphery. Battery manufacturing method.

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