Method for manufacturing photoelectric conversion elements

Abstract

To provide a manufacturing method for a photoelectric conversion element exhibiting the excellent photoelectric conversion efficiency and being capable of easy manufacture.SOLUTION: Provided is a manufacturing method for a photoelectric conversion element in which a laminate including a light-transmitting substrate, a transparent conductive film, a first conductive layer, a power generation layer, and a second conductive layer in this order is integrated. The second conductive layer includes a porous independent sheet including at least single-layer carbon nanotube. The manufacturing method includes the steps of: stacking the porous independent sheet on the power generation layer in a state where at least one bonding surface of the power generation layer and the porous independent sheet keeps a solvent or a solution; and thermally pressing the porous independent sheet stacked on the power generation layer.SELECTED DRAWING: Figure 1

Claims

1. A method for manufacturing a photoelectric conversion element, The aforementioned photoelectric conversion element is formed by integrating a laminate comprising a light-transmitting substrate, a transparent conductive film, a first conductive layer, a power generation layer, and a second conductive layer in that order. The second conductive layer consists of a porous, self-supporting sheet containing at least single-walled carbon nanotubes. The aforementioned manufacturing method is The process involves laminating the porous self-supporting sheet onto the power generation layer while the bonding surface of the porous self-supporting sheet retains the solvent, A step of heating and pressing the porous self-supporting sheet laminated on the power generation layer, Includes, The power generation layer is a layer made of a perovskite compound, The solvent is a poor solvent for the perovskite compound. A method for manufacturing a photoelectric conversion element, comprising laminating the porous self-supporting sheet impregnated with the solvent onto the power generation layer.

2. A method for manufacturing a photoelectric conversion element, The aforementioned photoelectric conversion element is formed by integrating a laminate comprising a light-transmitting substrate, a transparent conductive film, a first conductive layer, a power generation layer, and a second conductive layer in that order. The second conductive layer consists of a porous self-supporting sheet containing at least single-walled carbon nanotubes. The aforementioned manufacturing method is The process involves laminating the porous self-supporting sheet onto the power generation layer while the bonding surface of the porous self-supporting sheet holds the solution, A step of heating and pressing the porous self-supporting sheet laminated on the power generation layer, Includes, The power generation layer is a layer made of a perovskite compound, The aforementioned solution is a solution obtained by dissolving at least one precursor of a perovskite compound in a poor solvent for the perovskite compound. A method for manufacturing a photoelectric conversion element, comprising stacking the porous self-supporting sheet impregnated with the aforementioned solution onto the power generation layer.

3. A method for manufacturing a photoelectric conversion element, The aforementioned photoelectric conversion element is formed by integrating a laminate comprising a light-transmitting substrate, a transparent conductive film, a first conductive layer, a power generation layer, and a second conductive layer in that order. The second conductive layer consists of a porous self-supporting sheet containing at least single-walled carbon nanotubes. A bonding layer is provided in at least a portion between the power generation layer and the second conductive layer, The bonding layer is made of organic material A and has a different composition and properties from the power generation layer and the second conductive layer. The power generation layer is a layer made of a perovskite compound, The aforementioned manufacturing method is The process involves immersing the porous self-supporting sheet in an organic material-containing solution obtained by dissolving the organic material A in a poor solvent, then removing it and heating and drying it to form the bonding layer on the porous self-supporting sheet, thereby obtaining a porous self-supporting sheet with a bonding layer. The process involves laminating the porous self-supporting sheet with the bonding layer onto the power generation layer while the bonding surface of the porous self-supporting sheet with the bonding layer holds the organic material-containing solution, A step of heating and pressing the porous self-supporting sheet with bonding layer that is laminated on the power generation layer, Includes, The poor solvent is a poor solvent for the perovskite compound, A method for manufacturing a photoelectric conversion element, comprising stacking the porous self-supporting sheet with a bonding layer, which is impregnated with the organic material-containing solution, onto the power generation layer.

4. The method for manufacturing a photoelectric conversion element according to claim 3, wherein the porous self-supporting sheet includes the organic material A.

5. The method for manufacturing a photoelectric conversion element according to claim 1 or 2, wherein the porous self-supporting sheet comprises the material constituting the power generation layer, or at least a portion of the material constituting the power generation layer.

6. A method for manufacturing a photoelectric conversion element according to any one of claims 1 to 5, wherein the film thickness of the porous self-supporting sheet is 20 μm or more.

7. The method for manufacturing a photoelectric element according to any one of claims 1 to 6, wherein the single-walled carbon nanotube satisfies the relationship between the average diameter (Av) and the standard deviation of the diameter (σ): 0.20 < (3σ / Av) < 0.

60.

8. The method for manufacturing a photoelectric element according to any one of claims 1 to 7, wherein the single-walled carbon nanotube shows an upwardly convex shape in the t-plot obtained from the adsorption isotherm.

9. A method for manufacturing a photoelectric conversion element according to any one of claims 1 to 8, wherein the first conductive layer comprises a metal oxide and / or an organic compound.

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