JP2008227282A - Method of manufacturing organic solar cell, and organic solar cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an organic solar cell including a photoelectric conversion layer having high photoelectric conversion efficiency. <P>SOLUTION: A method of manufacturing an organic solar cell includes: a first electrode forming step of forming a transparent first electrode 3 on a substrate 4; a photoelectric conversion layer forming step of forming the photoelectric conversion layer 5 on the first electrode 3 by linearizing at least one of a P-type material and an N-type material by an electrospinning method; and an electrode forming step of forming a second electrode 7 on the photoelectric conversion layer 5. When the photoelectric conversion layer 5 is formed, for example, a solvent including the P-type material is linearized and the N-type material is applied, while a solvent including the N-type material may be linearized and the P-type material may be applied. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for producing an organic solar cell that generates electric power by photoelectric conversion based on absorbed light, and an organic solar cell.

  In recent years, environmental protection activities have been active, and the expansion of photovoltaic power generation using sunlight that is supplied in an inexhaustible manner is desired. As a solar cell that performs such solar power generation, an organic solar cell is regarded as a promising alternative to a silicon solar cell that is difficult to adopt in terms of cost. The features of this organic solar cell are that it is much lighter, lower in cost and more workable than silicon solar cells, and can be used in any shape and application.

  As a conventional organic solar cell, a polymer bulk hetero type organic solar cell can be mentioned as an example. In this polymer bulk hetero type organic solar cell, a solution in which a P-type material and an N-type material are mixed is applied to a substrate on which a transparent first electrode has been formed to form a photoelectric conversion film. A simple configuration in which only two electrodes are formed can be achieved.

  In such a method for producing a polymer bulk hetero type organic solar cell, it is difficult to control the distribution of the P-type material and the N-type material in the photoelectric conversion film formed by mixing. Efficiency will change dramatically. Therefore, conventionally, the structure in the photoelectric conversion film is controlled to some extent by self-organization using layer separation of P-type material and N-type material adopting a special material by annealing after manufacturing the organic solar cell Thus, the photoelectric conversion efficiency is being increased.

JP 2005-236278 A

  However, in the conventional method for manufacturing an organic solar cell, the distribution control of the P-type material and the N-type material may be affected depending on the result of the annealing treatment, and the distribution cannot be completely controlled. It was. Therefore, some of the manufactured organic solar cells have been able to increase the photoelectric conversion efficiency in some cases, but on the other hand, transport paths such as uncertain charges are generated, and the photoelectric solar cells are produced. Some of them have low conversion efficiency. This is because the above-described method for manufacturing an organic solar cell has a problem caused by a material that a general material cannot be used, and the photoelectric conversion efficiency of the photoelectric conversion film in the manufactured organic solar cell. Still tended to be lower.

  The problem to be solved by the present invention includes the above-described problem as an example.

  In order to solve the above-mentioned problem, the invention described in claim 1 includes a first electrode forming step for forming a transparent first electrode on a substrate, and a P-type material and N on the first electrode by electrospinning. A photoelectric conversion layer forming step of forming a photoelectric conversion layer by linearizing at least one of the mold materials; and an electrode forming step of forming a second electrode on the photoelectric conversion layer.

  In order to solve the above-mentioned problem, the invention according to claim 7 is a first electrode forming step of forming a transparent first electrode on a substrate, and a P-type material and N on the first electrode by electrospinning. Produced by a method for producing an organic solar cell, comprising: a photoelectric conversion layer forming step for forming a photoelectric conversion layer by linearizing at least one of the mold materials; and an electrode formation step for forming a second electrode on the photoelectric conversion layer. It is characterized by that.

  In order to solve the above-mentioned problems, an invention according to claim 8 is directed to a substrate, a transparent first electrode formed on the substrate, and a linear P-type material formed on the first electrode. And a photoelectric conversion layer containing at least one of the N-type material and a second electrode formed on the photoelectric conversion layer.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
<First Embodiment>
FIG. 1 is a cross-sectional view illustrating a configuration example of an organic solar cell 1 in the first embodiment.
The organic solar cell 1 has a substrate 4, a first electrode 3, a photoelectric conversion layer 5, and a second electrode 7.
The substrate 4 is a transparent member such as glass or a film. A transparent first electrode 3 is formed on the substrate 4. A photoelectric conversion layer 5 is formed on the first electrode 3. The photoelectric conversion layer 5 has a configuration in which at least one of a P-type material and an N-type material is linearly entangled (hereinafter also referred to as “nanofiber”). Therefore, in this photoelectric conversion layer 5, the contact area between the P-type material and the N-type material is wide. A second electrode 7 is formed on the photoelectric conversion layer 5. The photoelectric conversion layer 5 includes an electron donating material and an electron accepting material.

  In the organic solar cell 1 having such a configuration, light L (hereinafter referred to as “external light”) L incident from the outside passes through the transparent substrate 4 and the first electrode 3 and reaches the photoelectric conversion layer 5. The photoelectric conversion layer 5 absorbs light L in the sunlight spectrum region by using an electron donating material or an electron accepting material having an absorption spectrum in the sunlight spectrum region.

  For example, when the light L is absorbed by the electron donating material, excitons are generated, and charge separation occurs at the contact interface between the P-type material and the N-type material to generate electrons and holes. Among these, electrons move to the electron-accepting material, and move from the second electrode 7 to the first electrode 3 through an external electric circuit. The electrons that have moved to the first electrode 3 combine with holes generated in the electron donating material and return to the original state. By repeating such electron movement, the organic solar cell 1 takes out electric energy from the first electrode 3 and the second electrode 7 thereof.

FIG. 2 is a cross-sectional view illustrating a configuration example in which a part of the photoelectric conversion layer 5 illustrated in FIG. 1 is enlarged.
The photoelectric conversion layer 5 uses a general material without using a special material as the P-type material and the N-type material. The photoelectric conversion layer 5 has an electron donating material and an electron accepting material as described above.

  Among these, as an electron-donating material, for example, an oligomer or a polymer having a skeleton of thiophene and a derivative thereof, an oligomer or a polymer having a skeleton of phenylene-vinylene and a derivative thereof, an oligomer or a polymer having a backbone of thienylene-vinylene and a derivative thereof, Oligomers and polymers having carbazole and its derivatives in the skeleton, oligomers and polymers having vinyl carbazole and its derivatives in the skeleton, oligomers and polymers having pyrrole and its derivatives in the skeleton, oligomers and polymers having acetylene and its derivatives in the skeleton, Oligomers and polymers having skeleton of anaphene and its derivatives, polymers such as oligomers and polymers having skeleton of heptadiene and its derivatives, metal-free phthalocyanines, metal phthalocyanines and derivatives thereof , Diamines, phenyldiamines and derivatives thereof, acenes such as pentacene and derivatives thereof, porphyrin, tetramethylporphyrin, tetraphenylporphyrin, tetrabenzporphyrin, monoazotetrabenzporphyrin, diazotetrabenzporphine, triazotetrabenz Metallic porphyrins such as porphyrin, octaethylporphyrin, octaalkylthioporphyrazine, octaalkylaminoporphyrazine, hemiporphyrazine, chlorophyll and metalloporphyrin and their derivatives, cyanine dyes, merocyanine dyes, squarylium dyes, quinacridone dyes, azo dyes, Low molecules such as quinone dyes such as anthraquinone, benzoquinone and naphthoquinone can be used. Examples of the central metal of metal phthalocyanine and metal porphyrin include magnesium, zinc, copper, silver, aluminum, silicon, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, tin, platinum, lead and other metals, metal oxides Metal halides are used. The electron donating material is not limited to these materials, and any material may be used as long as it is an electron donating material.

  Examples of the electron-accepting material include oligomers and polymers having pyridine and derivatives thereof as skeletons, oligomers and polymers having quinoline and derivatives thereof as skeletons, ladder polymers using benzophenanthrolines and derivatives thereof, and cyano-polyphenylene vinylene. Small molecules such as polymers, fluorinated metal-free phthalocyanines, fluorinated metal phthalocyanines and derivatives thereof, perylene and derivatives thereof (PTCDA, PTCDI, etc.), naphthalene derivatives (NTCDA, NTCDA, etc.), bathocuproin and derivatives thereof sell. As the electron-accepting material, for example, fullerene derivatives such as PCBM, carbon nanotube derivatives, and the like are also used. The electron-accepting material is not limited to these materials, and any material having an electron-accepting material may be adopted.

  As will be described later, in the photoelectric conversion layer 5, at least one of a P-type material and an N-type material is linearized by an electrospinning method (electrospray method). For this reason, in this photoelectric conversion layer 5, the contact area between the P-type material and the N-type material is large.

  Therefore, in the photoelectric conversion layer 5, the first electrode 3 and the like are efficiently used for the electrons and holes generated based on the absorbed light, using the linearized P-type material and N-type material as carrier transport paths. Can be supplied to. Therefore, the organic solar cell 1 can efficiently generate power based on the absorbed light L.

The configuration of the organic solar cell 1 is as described above. Next, an example of a method for manufacturing the organic solar cell 1 will be described.
3-5 is sectional drawing which shows an example of the manufacturing method of the organic solar cell 1, respectively.
As shown in FIG. 3, a first electrode 3 made of ITO (Indium Tin Oxide) is formed on the substrate 4. A buffer layer (not shown) such as so-called PEDOT may be applied on the first electrode 3 as necessary.

<Formation of photoelectric conversion layer by electrospinning>
As described above, the photoelectric conversion layer 5 is formed on the first electrode 3 by the electrospinning method (electrospray method) as follows. The photoelectric conversion layer 5 employs, for example, P3HT and PCBM as the P-type material and the N-type material, respectively.

  In this electrospinning method, first, the substrate 4 on which the first electrode 3 has been formed is placed on the counter electrode 15 as shown in FIG. A capillary 11 supported by a support unit (not shown) is disposed on the counter electrode 15. The capillary 11 linearizes (nanofibers) a P-type material 11a dissolved in a predetermined solvent and discharges it. The power source 14 applies a high voltage of, for example, 5 kV to 100 KV between the capillary 11 and the counter electrode 15.

  The counter electrode 15 rotates in the R direction relative to, for example, both capillaries 11 in a state where the substrate 4 on which the first electrode 3 is formed is disposed. Here, in this embodiment, the capillary 11 may rotate in the R direction with respect to the fixed counter electrode 15, or the capillary 11 may rotate in the R direction with respect to the fixed capillary 11. good. In the present embodiment, the latter will be adopted for explanation.

  The capillary 11 linearizes the P-type material 11a dissolved in a predetermined solvent from the nozzle, and blows out an amount of, for example, 1 nl / min to 100 nl / min. In the case of performing high-speed film formation, the number of nozzles may be increased. Then, the solvent containing the P-type material 11a is attracted to the counter electrode 15 by the voltage applied by the power source 15 in a linear state. The counter electrode 15 is provided with the substrate 4 on which the first electrode 3 is formed as described above, and the solvent containing the linear P-type material 11a is volatilized in the air while being volatilized in the air. It adheres to the surface of one electrode 3.

  At this time, since the capillary 11 is rotating in the R direction relative to the counter electrode 15 as described above, the solvent containing the P-type material 11a discharged from the capillary 11 is linearized in the air. It becomes a complicated shape. Then, since this solvent volatilizes in the air, the linearized P-type material 11a is laminated on the surface of the first electrode 3 so as to have a predetermined thickness while maintaining a complicated shape.

  Next, for example, a liquid N-type material is applied so as to fill a gap between the P-type material 11a linearized in this way. Then, since this liquid N-type material covers the surface of the linear P-type material, the contact area with the P-type material 11a increases.

  Therefore, the photoelectric conversion layer 5 is formed on the first electrode 3 by the P-type material 11a and the N-type material as shown in FIG. When the photoelectric conversion layer 5 is thus formed, a buffer layer made of titanium oxide or the like may be formed on the photoelectric conversion layer 5 next. When the photoelectric conversion layer 5 is formed as described above, the second electrode 7 is formed on the photoelectric conversion layer 5 as shown in FIG. In this way, the organic solar cell 1 is completed.

  The manufacturing method of the organic solar cell 1 in the above embodiment includes a first electrode forming step of forming the transparent first electrode 3 on the substrate 4, and a P-type material and N on the first electrode 3 by electrospinning. A photoelectric conversion layer forming step in which at least one of the mold materials is linearized (nanofiberized) to form the photoelectric conversion layer 5, and an electrode forming step in which the second electrode 7 is formed on the photoelectric conversion layer 5 . In the present embodiment, in forming the photoelectric conversion layer 5, as an example, the solvent containing the P-type material is linearized and the N-type material is applied. However, the solvent containing the N-type material is linearized to form the P-type material. May be applied.

  That is, in the photoelectric conversion layer 5, the P-type material and the N-type material are mixed in a fine nano-level fiber state and are in close contact with each other, so that the contact area between the P-type material and the N-type material Becomes larger. Therefore, since the photoelectric conversion layer 5 absorbs light and easily separates charges, and a carrier transport path for electrons and holes to reach each electrode can be ensured, each of them can be regenerated before reaching each electrode. There is no possibility of bonding, and each electrode can be reliably taken out. For this reason, the photoelectric conversion efficiency of the organic solar cell 1 is improved by the action of the photoelectric conversion layer 5 as described above. In the present embodiment, an organic material is exemplified as the material of the photoelectric conversion layer 5, but it is known that this organic material has lower electron and hole mobility than an inorganic material. Since this embodiment has a configuration in which the contact area between the P-type material and the N-type material is large even though it is an organic material, the low mobility of such an organic material is complemented and the photoelectric conversion efficiency is improved. Contribute to that.

  Here, when such an electrospinning method is used, when the P-type material (and at least one of the N-type materials) reaches the first electrode 3 of the substrate 4, the solvent is volatilized and in a solid state, the photoelectric conversion layer 5 can be formed. In general, in the application-side solar cell, when the first layer is applied and then the second layer is applied, the solvent of the second layer dissolves the first layer, and it may be difficult to obtain a preferable PN junction interface. It was. However, when such an electrospinning method is used, the P-type material reaches the first electrode 3 in a state where the solvent is volatilized, and the photoelectric conversion layer 5 can be formed, so that a preferable PN junction interface is obtained. Is possible. Therefore, according to such a method for manufacturing the organic solar cell 1, a large number of PN junction interfaces can be freely formed in the photoelectric conversion layer 5, and the organic solar cell 1 with high photoelectric conversion efficiency can be manufactured.

  In addition to the above-described method, the method for manufacturing the organic solar cell 1 in the above-described embodiment further includes at least one of the P-type material and the N-type material linearized by the electrospinning method in the photoelectric conversion layer forming step. On the other hand, at least one of the P-type material and the N-type material is applied while the substrate 4 is relatively rotated.

  In this way, the linearized P-type material and N-type material are intertwined with each other more complicatedly by rotation, and the contact area between the P-type material and the N-type material is increased. Then, the organic solar cell 1 can efficiently send electrons and holes emitted from the photoelectric conversion layer 5 that has absorbed light to the first electrodes 3 and the like.

  In the method for manufacturing the organic solar cell 1 in the above embodiment, after forming the first electrode 3 on the substrate 4 and before forming the photoelectric conversion layer 5, a P-type material is formed on the first electrode 3. A short-circuit prevention forming step of applying to form a short-circuit prevention layer;

  In this way, the first electrode 3 and the second electrode 7 can be prevented from being short-circuited after the photoelectric conversion layer 5 is formed.

  The organic solar cell 1 in the embodiment includes a first electrode forming step of forming a transparent first electrode 3 on a substrate 4, and a P-type material and an N-type material on the first electrode 3 by electrospinning. Manufactured by a method for producing an organic solar cell 1 having a photoelectric conversion layer forming step for forming a photoelectric conversion layer 5 by linearizing at least one and an electrode forming step for forming a second electrode 7 on the photoelectric conversion layer 5. It is characterized by that.

  The organic solar cell 1 in the above embodiment includes a substrate 4, a transparent first electrode 3 formed on the substrate 4, a linear P-type material and N formed on the first electrode 3. It has the photoelectric converting layer 5 comprised by at least one of the type | mold material, and the 2nd electrode 7 formed on the said photoelectric converting layer 5. FIG.

  In this photoelectric conversion layer 5, since the P-type material and the N-type material are in contact with each other in a fine nano-level fiber state, the contact area between the P-type material and the N-type material is increased. Therefore, the electrons and holes that have been separated by charge when the photoelectric conversion layer 5 absorbs light are not recombined before reaching each electrode 3 and the like, and can be reliably extracted at each electrode 3. For this reason, the photoelectric conversion efficiency of the organic solar cell 1 is improved by the action of the photoelectric conversion layer 5 as described above.

Second Embodiment
FIG. 6 is a cross-sectional view showing a modification of a part of the method for manufacturing the organic solar cell 1 in the second embodiment.
Since the manufacturing method of the organic solar cell 1 in the second embodiment has substantially the same procedure and the same configuration as the manufacturing method of the solar cell 1 in the first embodiment, the same procedure and configuration are the same for the first procedure. The same reference numerals as those in FIGS. 1 to 5 in the embodiment are used, and the description thereof is omitted. In the following description, different points are mainly described.

  In the first embodiment, in forming the photoelectric conversion layer 5, a method of linearizing a P-type material or an N-type material using an electrospinning method and coating the N-type material or the P-type material thereon is exemplified. However, in the second embodiment, both the P-type material and the N-type material are linearized by an electrospinning method.

  That is, in the second embodiment, in forming the photoelectric conversion layer 5 using the above-described electrospinning method, as shown in FIG. 6, one capillary 11 linearizes and discharges the solvent containing the P-type material 11a. On the other hand, the other capillary 13 linearizes the solvent containing the N-type material 13a, and blows out an amount of, for example, 1 nl / min to 100 nl / min. In the case of performing high-speed film formation, the number of nozzles may be increased.

  The other capillary 13 linearizes and discharges the N-type material 13a dissolved in a predetermined solvent. The power source 17 applies a high voltage of, for example, 5 kV to 100 KV between the capillary 13 and the counter electrode 17. The counter electrode 15 rotates in the R direction relative to, for example, both the capillaries 11 and 13 in a state where the substrate 4 on which the first electrode 3 is formed is disposed.

  In this embodiment, the capillaries 11 and 13 may rotate in the R direction with respect to the fixed counter electrode 15, or the counter electrode 15 may be rotated in the R direction with respect to the fixed capillaries 11 and 13. It may rotate. In the present embodiment, the latter is adopted.

  The other capillaries 13 are arranged in parallel with the P-type material 11a dissolved in a predetermined solvent by the capillary 11 and discharged in parallel with the N-type material 13a dissolved in the predetermined solvent as in the first embodiment. It is linearized and discharged. Then, the solvent containing the N-type material 13a is attracted to the counter electrode 15 by the voltage applied by the power source 17 in a linear state. The counter electrode 15 is provided with the substrate 4 on which the first electrode 3 is formed as described above, and the solvent containing the linear N-type material 13a is volatilized in the air while being volatilized in the air. It adheres to the surface of one electrode 3.

  At this time, since the capillaries 11 and 13 rotate in the R direction relative to the counter electrode 15 as described above, the solvent and the N-type material including the P-type material 11a discharged from the capillaries 11 and 13 respectively. The solvent containing 13a is complicatedly entangled in the air. Then, since these solvents volatilize in the air, they are intricately intertwined, so that the linear P-type material 11a and the linear N-type material 13a from which these solvents volatilize increase the contact area while increasing the contact area. Are laminated to have a predetermined thickness.

  In the method for manufacturing the organic solar cell 1 in the above embodiment, in the photoelectric conversion layer forming step, both the P-type material 11a and the N-type material 13a are linearized by an electrospinning method (electrospray method). A conversion layer 5 is formed.

  Thus, the photoelectric conversion layer 5 is formed by forming the P-type material 11a and the N-type material 13a linearized by the electrospinning method on the first electrode 3. Therefore, in the photoelectric conversion layer 5, the P-type material 11a and the N-type material 13a are intertwined in a complicated manner, and the contact area is increased.

  Then, since this photoelectric conversion layer 5 positively separates electrons and holes that have been separated upon absorption of light through the linear P-type material and the like, is directed to each electrode 3 and the like, so-called bulk hetero solar As in the case of a battery, there is no possibility of recombination in the middle due to insufficient formation of a charge passage path. Therefore, the organic solar cell 1 having such a photoelectric conversion layer 5 has improved photoelectric conversion efficiency.

<Third Embodiment>
FIG. 7 is a cross-sectional view showing a configuration example of an organic solar cell 1a manufactured by the method for manufacturing an organic solar cell in the third embodiment.
Since the manufacturing method of the organic solar cell 1 in the third embodiment is substantially the same procedure and substantially the same configuration as the manufacturing method of the solar cell 1 in the first and second embodiments, the same procedure and Regarding the configuration, the same reference numerals as those in FIGS. 1 to 5 in the first embodiment and the second embodiment are used, and the description thereof is omitted. In the following description, different points are mainly described.

  This organic solar cell 1a has substantially the same configuration as the organic solar cell 1 in each of the above embodiments, but a P-type material layer 6 is formed between the first electrode 3 and the photoelectric conversion layer 5, An N-type material layer 8 is formed between the photoelectric conversion layer 5 and the second electrode 7. Note that at least one of the P-type material layer 6 and the N-type material layer 8 may be formed.

<Short-circuit prevention layer forming step>
In addition to the manufacturing method of the organic solar cell 1 in each of the above embodiments, the method for manufacturing the organic solar cell 1a in the above embodiment further includes forming the first electrode on the substrate 4 and then forming the photoelectric conversion layer 5 Before forming, a short-circuit prevention forming step of forming a first short-circuit prevention layer 6 (P-type material layer) by applying a P-type material on the first electrode 3 is provided.

  If it does in this way, since the manufactured organic solar cell 1a can ensure that the 1st electrode 3 and the 2nd electrode 7 do not contact directly directly, the 1st electrode 3 and the 2nd electrode 7 will be A short circuit can be avoided.

<Other short-circuit prevention layer forming steps>
In addition to the method for manufacturing the organic solar cell 1a, the method for manufacturing the organic solar cell 1a in the above embodiment further includes the photoelectric conversion after the photoelectric conversion layer 5 is formed and before the second electrode 7 is formed. Another short-circuit prevention forming step of forming another short-circuit prevention layer 8 (second short-circuit prevention layer) by applying an N-type material on the layer 5 is provided.

  If it does in this way, since the manufactured organic solar cell 1a can ensure that the 1st electrode 3 and the 2nd electrode 7 do not contact directly directly, the 1st electrode 3 and the 2nd electrode 7 will be A short circuit can be avoided.

  In addition, this embodiment is not restricted above, A various deformation | transformation is possible. Hereinafter, such modifications will be described in order.

<Modification of the method for forming a photoelectric conversion layer by electrospinning (spraying)>
In the above embodiment, the solvent containing the P-type material and the N-type material is discharged from the capillaries 11 and 13 in FIG. 4, but instead, only one of these is discharged from the capillary 11 or the like, and the other The film may be formed on the first electrode 3 by a spin coating method, a blade method, a printing method, or the like. In this case, the material that is linearized by the capillary 11 or the like is preferably a material that is hardly soluble in a solvent to be coated later. In addition, even if the material to be linearized (nanofiber) in this way is dissolved in a solvent to be coated later, it is considered that a certain degree of fiber shape or dot shape can be maintained for a short time. It is done.

  In the above embodiment, a linear P-type material or the like is used for forming the photoelectric conversion layer 5. However, the present invention is not limited thereto, and dots such as a fine P-type material are formed on the first electrode 3. Anyway. That is, in the electrospinning method, since the solvent is volatilized in the air after blowing out while linearizing, the P-type material and the like are controlled to be attached in a solid state when attached to the first electrode 3 on the substrate 4. You can also. Therefore, when the P-type material and the N-type material are laminated by the method of forming such dots, the two materials are not mixed and a laminated structure of the P-type material and the N-type material is obtained. This makes it easy to control manufacturing. In this case, if necessary, a mixed layer may be formed at the contact interface between the P-type material and the N-type material by performing an annealing process after the photoelectric conversion layer 5 is stacked.

  In the first embodiment, the N-type material is applied on the first electrode 3 after the linear P-type material is formed. However, the present invention is not limited to this, and the linear N-type material is applied. A P-type material may be applied after the formation. Furthermore, in the first embodiment, the linearized P-type material may be embedded on the first electrode 3 after applying the N-type material. Similarly, in the first embodiment, a linear N-type material may be embedded on the first electrode 3 after applying a P-type material.

FIG. 8 is a cross-sectional view showing a configuration example of an organic solar cell 1b manufactured by applying the above embodiments.
This organic solar cell 1b has substantially the same configuration as that of the organic solar cell 1 in the first embodiment, but the P-type material in the photoelectric conversion layer 5a having substantially the same configuration as the photoelectric conversion layer 5 in the first embodiment and The state of the N-type material is different.

  That is, the photoelectric conversion layer 5a has a structure in which, for example, a large number of P-type materials and N-type materials are spun perpendicularly to the substrate 4 (along the arrangement direction of the first electrode 3 and the second electrode 7). (Hereinafter referred to as “vertical alignment structure”). In order to realize such a vertical alignment structure, a linear N-type material is formed on the first electrode 3, and a P-type material is formed thereon, whereby the P-type material and the N-type material are formed. The material may have a vertical alignment structure, or a linear P-type material may be formed on the first electrode 3, and an N-type material may be formed thereon.

  In the method for manufacturing the organic solar cell 1 in the above embodiment, in the photoelectric conversion layer forming step, the P-type material or the N-type material is linearly formed along the direction in which the first electrode 3 and the second electrode 7 face each other. To form.

  If it does in this way, in the organic solar cell 1, the photoelectric converting layer 5 etc. will become an ideal structure, and photoelectric conversion efficiency will become the best.

It is sectional drawing which shows the structural example of the organic solar cell in 1st Embodiment. It is sectional drawing which shows the structural example which expanded and represented a part of photoelectric conversion layer shown in FIG. It is sectional drawing which shows an example of the manufacturing method of an organic solar cell. It is sectional drawing which shows an example of the manufacturing method of an organic solar cell. It is sectional drawing which shows an example of the manufacturing method of an organic solar cell. It is sectional drawing which shows the some modification of the manufacturing method of the organic solar cell in 2nd Embodiment. It is sectional drawing which shows the structural example of the organic solar cell manufactured by the manufacturing method of the organic solar cell in 3rd Embodiment. It is sectional drawing which shows the structural example of the organic solar cell manufactured by applying said each embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Organic solar cell 1a Organic solar cell 3 1st electrode 4 Board | substrate 5 Photoelectric conversion layer 5a Photoelectric conversion layer 7 2nd electrode

Claims (8)

A first electrode forming step of forming a transparent first electrode on the substrate;
A photoelectric conversion layer forming step of forming a photoelectric conversion layer by linearizing at least one of a P-type material and an N-type material by electrospinning on the first electrode;
And an electrode forming step of forming a second electrode on the photoelectric conversion layer. In the manufacturing method of the organic solar cell of Claim 1,
In the photoelectric conversion layer forming step, the photoelectric conversion layer is formed by linearizing both the P-type material and the N-type material by the electrospinning method. In the manufacturing method of the organic solar cell of Claim 1 or Claim 2,
In the photoelectric conversion layer forming step,
Applying at least one of the P-type material and the N-type material while rotating the substrate relative to at least one of the P-type material and the N-type material linearized by the electrospinning method. The manufacturing method of the organic solar cell characterized by these. In the manufacturing method of the organic solar cell in any one of Claims 1 thru | or 3,
After forming the first electrode on the substrate and before forming the photoelectric conversion layer, the method includes a short-circuit preventing layer forming step of forming a short-circuit preventing layer by applying a P-type material on the first electrode. The manufacturing method of the organic solar cell characterized by these. In the manufacturing method of the organic solar cell in any one of Claims 1 thru | or 4,
After forming the photoelectric conversion layer, before forming the second electrode, it has another short-circuit prevention forming step of forming another short-circuit prevention layer by applying an N-type material on the photoelectric conversion layer. A method for producing an organic solar cell. In the manufacturing method of the organic solar cell in any one of Claims 1 thru | or 5,
In the photoelectric conversion layer forming step,
A method for producing an organic solar cell, comprising forming a P-type material or an N-type material in a line along a direction in which the first electrode and the second electrode face each other. A first electrode forming step of forming a transparent first electrode on the substrate;
A photoelectric conversion layer forming step of forming a photoelectric conversion layer by linearizing at least one of a P-type material and an N-type material by electrospinning on the first electrode;
An organic solar cell produced by a method for producing an organic solar cell comprising an electrode forming step of forming a second electrode on the photoelectric conversion layer. A substrate,
A transparent first electrode formed on the substrate;
A photoelectric conversion layer formed on the first electrode and including at least one of a linearized P-type material and N-type material;
An organic solar battery comprising: a second electrode formed on the photoelectric conversion layer.

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