Laminated photovoltaic module and power generation device

Abstract

The utility model relates to a laminated photovoltaic assembly and a power generation device. The laminated photovoltaic module comprises a first battery unit, a metal layer and a second battery unit which are sequentially laminated from bottom to top. The metal layer in the solar cell can effectively improve electron-hole recombination between the two cell units.

Description

Technical Field

[0001] This utility model relates to the field of solar cell technology, and in particular to a tandem photovoltaic module and a power generation device. Background Technology

[0002] All-perovskite tandem solar cells are constructed by connecting wide-bandgap perovskite sub-cells and narrow-bandgap perovskite sub-cells in series. Utilizing the different bandgap properties of perovskite allows for absorption of different wavelengths of the spectrum, thereby increasing the utilization rate of the solar spectrum. Compared to single-cell cells, all-perovskite tandem solar cells can effectively improve the efficiency of perovskite cells, thus reducing device costs, and represent an important development direction for photovoltaic technology.

[0003] Currently, the main method for fabricating perovskite solar cells is the solution method. Therefore, during the fabrication of tandem modules, the solvent in the solution can easily corrode the already fabricated front cell when preparing the back cell. Directly stacking and connecting two cell units results in poor recombination between the two cell units, leading to lower conversion efficiency of the tandem solar cell. Furthermore, sputtering an indium tin oxide layer (composite layer) between the two cell units can cause sputtering damage to the front cell.

[0004] Therefore, there is an urgent need to develop a tandem photovoltaic module that can overcome the above problems. Utility Model Content

[0005] Therefore, it is necessary to provide a tandem photovoltaic module and power generation device to address the problems that the solvent in the raw material solution of the back cell can easily corrode the prepared front cell during the preparation of tandem photovoltaic modules, and that the recombination effect of holes and electrons will deteriorate after the two cell units are directly stacked and connected.

[0006] A tandem photovoltaic module includes the following structure stacked sequentially from bottom to top: a first battery cell, a metal layer, and a second battery cell.

[0007] In the aforementioned tandem photovoltaic modules, the metal layer can effectively improve electron-hole recombination between two battery cells.

[0008] In one embodiment, the metal layer contains at least one of bismuth and vanadium.

[0009] In one embodiment, the metal layer includes at least one of a bismuth metal thin film, a vanadium metal thin film, an alloy thin film containing bismuth metal, an alloy thin film containing vanadium metal, a composite thin film containing bismuth metal, or a composite thin film containing vanadium metal.

[0010] In one embodiment, the metal layer is a bismuth metal film or a vanadium metal film.

[0011] The aforementioned bismuth (Bi) metal thin film and vanadium metal thin film, as metal layers, can reduce sputtering damage to the first battery cell caused by sputtering indium tin oxide thin film.

[0012] In one embodiment, the thickness of the metal layer is 1 nm to 20 nm.

[0013] In one embodiment, the thickness of the metal layer is 1 nm to 15 nm.

[0014] In one embodiment, the sheet resistance of the metal layer is ≤13Ω / cm. 2 .

[0015] The aforementioned bismuth (Bi) metal thin film or vanadium (V) metal thin film can enhance electron-hole recombination in tandem devices, effectively reduce open-circuit voltage loss and current loss in tandem photovoltaic modules, improve the fill factor of tandem photovoltaic modules, and thus improve the photoelectric conversion efficiency of tandem photovoltaic modules.

[0016] In one embodiment, the light transmittance of the metal layer is 90% to 95%.

[0017] The metal layer of the aforementioned bismuth (Bi) metal thin film or vanadium (V) metal thin film has good light transmittance, which can reduce the light loss of the first battery cell, thereby increasing the current of the overall tandem battery module and improving the module efficiency.

[0018] In one embodiment, the first battery cell includes a perovskite battery and / or the second battery cell includes a perovskite battery.

[0019] In one embodiment, the first battery cell includes a perovskite battery, and the second battery cell includes a perovskite battery.

[0020] In one embodiment, the first battery cell includes a wide-bandgap perovskite cell with a bandgap of 1.7 eV to 1.9 eV; the second battery cell includes a narrow-bandgap perovskite cell with a bandgap of 1.2 eV to 1.4 eV.

[0021] In one embodiment, the first battery cell includes the following structure stacked sequentially from bottom to top: a first electrode layer, a first hole transport layer, a wide-bandgap perovskite layer, and a first electron transport layer.

[0022] In one embodiment, the second battery cell includes the following structure stacked sequentially from bottom to top: a second hole transport layer, a narrow bandgap perovskite layer, a second electron transport layer, and a second electrode layer.

[0023] In one embodiment, the first electrode layer includes at least one of indium tin oxide (ITO) film, germanium-doped indium tin oxide (IGZO) film, aluminum-doped indium tin oxide (IAO) film, indium tin zinc oxide (ITZO) film, and indium tin gallium oxide (ITGO) film.

[0024] In one embodiment, the first hole transport layer and / or the second hole transport layer contains at least one of the following: a self-assembled monolayer membrane material, PEDOT:PSS (a polymer formed from poly(3,4-ethylenedioxythiophene) and polystyrene sulfonate), nickel oxide (NiO), molybdenum oxide (MoO3), PTAA (poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine]), Spiro-OMeTAD (2,2',7,7'-tetratetra[N,N-di(4-methoxyphenyl)amino]-9,9'-spirodifluorene), and Poly-TPD (4-but-N,N-diphenylaniline homopolymer).

[0025] In one embodiment, the first electron transport layer and / or the second electron transport layer contains C 60 (Fullerene), BCP (bicyclopentadiene), titanium dioxide (TiO2), tin oxide (SnO2), zinc oxide (ZnO), PCBM ([6,6]-phenyl-C 61 At least one of (-methyl butyrate).

[0026] In one embodiment, the tandem photovoltaic module further includes a transparent conductive oxide layer; the transparent conductive oxide layer is disposed between the metal layer and the second battery cell. The transparent conductive oxide layer is connected to the metal layer and the second battery cell.

[0027] In one embodiment, the transparent conductive oxide layer includes at least one of indium tin oxide (ITO) film, germanium-doped indium tin oxide (IGZO) film, aluminum-doped indium tin oxide (IAO) film, indium tin zinc oxide (ITZO) film, and indium tin gallium oxide (ITGO) film.

[0028] In one embodiment, the thickness of the transparent conductive oxide layer is 13-18 nm. The transparent conductive oxide layer can protect the first battery cell from the solvent used in the fabrication of the second battery cell and can improve the electron-hole recombination between the first and second battery cells.

[0029] In one embodiment, the hole transport layer contains PEDOT:PSS. PEDOT:PSS, as a hole transport layer, has advantages such as good conductivity, high optical transparency, and the ability to be dissolved in a solution for coating.

[0030] In one embodiment, the metal layer is a composite layer of the stacked photovoltaic module.

[0031] In one embodiment, the metal layer and the transparent conductive oxide layer are composite layers of the stacked photovoltaic module.

[0032] The aforementioned composite layer refers to a structure that can capture electrons from the first electron transport layer of the first battery cell and holes from the second hole transport layer of the second battery cell, thereby promoting electron-hole recombination.

[0033] The dense structure composed of the metal layer and the transparent conductive oxide layer can effectively isolate the first cell from the erosion of various narrow bandgap perovskite solvents during the fabrication of the second cell, and can improve the electron-hole recombination between the first cell and the second cell. This can effectively reduce the open-circuit voltage loss and current loss of the tandem photovoltaic module, improve the fill factor of the tandem photovoltaic module, and thus improve the photoelectric conversion efficiency of the tandem photovoltaic module.

[0034] This utility model also provides a power generation device, including the stacked photovoltaic module as described above.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] This invention discloses a tandem photovoltaic module and power generation device. The metal layer effectively enhances electron-hole recombination between two battery cells. Bismuth (Bi) and vanadium (V) metal films, used as metal layers, reduce sputtering damage to the first battery cell caused by sputtered indium tin oxide (ITO) films. Bismuth (Bi) or vanadium (V) metal films improve electron-hole recombination in the tandem device, effectively reducing open-circuit voltage and current losses, increasing the fill factor, and thus improving the photoelectric conversion efficiency. The metal layers of the bismuth (Bi) or vanadium (V) metal films have good light transmittance, reducing light loss in the first battery cell and increasing the overall current of the tandem battery module, thereby improving module efficiency. The transparent conductive oxide layer protects the first battery cell from solvent damage during the fabrication of the second battery cell and enhances electron-hole recombination between the first and second battery cells. The dense structure composed of the metal layer and the transparent conductive oxide layer can effectively isolate the first cell from the erosion of various narrow bandgap perovskite solvents during the fabrication of the second cell, and can improve the electron-hole recombination between the first cell and the second cell. This can effectively reduce the open-circuit voltage loss and current loss of the tandem photovoltaic module, improve the fill factor of the tandem photovoltaic module, and thus improve the photoelectric conversion efficiency of the tandem photovoltaic module. Attached Figure Description

[0037] Figure 1This is a schematic diagram illustrating one possible structure of the multilayer photovoltaic module of this utility model;

[0038] Figure 2 This is a schematic diagram of one structure of the multilayer photovoltaic module in this utility model.

[0039] Explanation of reference numerals in the attached figures: 1. First electrode layer; 2. First hole transport layer; 3. Wide bandgap perovskite layer; 4. First electron transport layer; 5. Metal layer; 6. Transparent conductive oxide layer; 7. Second hole transport layer; 8. Narrow bandgap perovskite layer; 9. Second electron transport layer; 10. Second electrode layer. Detailed Implementation

[0040] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0041] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] Example 1

[0044] A type of tandem photovoltaic module, such as Figure 1 As shown, the structure includes the following layers stacked from bottom to top: a first battery cell, a metal layer 5, and a second battery cell. Specifically, it consists of a first electrode layer 1, a first hole transport layer 2, a wide bandgap perovskite layer 3, a first electron transport layer 4, a metal layer 5, a second hole transport layer 7, a narrow bandgap perovskite layer 8, a second electron transport layer 9, and a second electrode layer 10, stacked from bottom to top. The metal layer 5 is a composite layer of the multilayer photovoltaic module.

[0045] The first electrode layer 1 comprises at least one of indium tin oxide (ITO) film, germanium-doped indium tin oxide (IGZO) film, aluminum-doped indium tin oxide (IAO) film, indium tin zinc oxide (ITZO) film, or indium tin gallium oxide (ITGO) film; the first hole transport layer 2 contains at least one of self-assembled monolayer film material, PEDOT:PSS (polymer formed by poly(3,4-ethylenedioxythiophene) and polystyrene sulfonate), nickel oxide (NiO), molybdenum oxide (MoO3), PTAA (poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine]), Spiro-OMeTAD (2,2',7,7'-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirodifluorene), and Poly-TPD (4-but-N,N-diphenylaniline homopolymer); the wide bandgap perovskite layer 3 has a bandgap of 1.7 eV to 1.9 eV; the first electron transport layer 4 contains C 60 At least one of BCP (dicyclopentadiene), titanium dioxide (TiO2), tin oxide (SnO2), zinc oxide (ZnO), and PCBM ([6,6]-phenyl-C61-butyrate methyl ester); the metal layer 5 contains at least one of bismuth metal and vanadium metal, specifically including at least one of bismuth metal thin film, vanadium metal thin film, alloy thin film containing bismuth metal, alloy thin film containing vanadium metal, composite thin film containing bismuth metal, or composite thin film containing vanadium metal, the thickness of the metal layer 5 is 1nm~20nm, and the sheet resistance is ≤13Ω / cm. 2 The light transmittance is 90%~95%; the second hole transport layer 7 contains at least one of the following: self-assembled monolayer film material, PEDOT:PSS (a polymer formed by poly(3,4-ethylenedioxythiophene) and polystyrene sulfonate), nickel oxide (NiO), molybdenum oxide (MoO3), PTAA (poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine]), Spiro-OMeTAD (2,2',7,7'-tetratetra[N,N-di(4-methoxyphenyl)amino]-9,9'-spirodifluorene), and Poly-TPD (4-but-N,N-diphenylaniline homopolymer); the band gap of the narrow band gap perovskite layer 8 is 1.2 eV~1.4 eV; the second electron transport layer 9 contains C 60 BCP (dicyclopentadiene), titanium dioxide (TiO2), tin oxide (SnO2), zinc oxide (ZnO), PCBM ([6,6]-phenyl-C 61 At least one of (-methyl butyrate); the second electrode layer 10 contains metallic silver.

[0046] Example 2

[0047] A tandem photovoltaic module is basically the same as that in Example 1, except that the thickness of the metal layer 5 is 1nm~15nm.

[0048] Example 3

[0049] A type of tandem photovoltaic module, such as Figure 2 As shown, the structure includes the following layers stacked from bottom to top: a first battery cell, a metal layer 5, and a second battery cell. Specifically, it consists of the following layers stacked from bottom to top: a first electrode layer 1, a first hole transport layer 2, a wide bandgap perovskite layer 3, a first electron transport layer 4, a metal layer 5, a transparent conductive oxide layer 6, a second hole transport layer 7, a narrow bandgap perovskite layer 8, a second electron transport layer 9, and a second electrode layer 10. The metal layer 5 and the transparent conductive oxide layer 6 together form the composite layer of the multilayer photovoltaic module.

[0050] The first electrode layer 1 comprises at least one of indium tin oxide (ITO) film, germanium-doped indium tin oxide (IGZO) film, aluminum-doped indium tin oxide (IAO) film, indium tin zinc oxide (ITZO) film, or indium tin gallium oxide (ITGO) film; the first hole transport layer 2 contains at least one of self-assembled monolayer film material, PEDOT:PSS (polymer formed by poly(3,4-ethylenedioxythiophene) and polystyrene sulfonate), nickel oxide (NiO), molybdenum oxide (MoO3), PTAA (poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine]), Spiro-OMeTAD (2,2',7,7'-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirodifluorene), and Poly-TPD (4-but-N,N-diphenylaniline homopolymer); the wide bandgap perovskite layer 3 has a bandgap of 1.7 eV to 1.9 eV; the first electron transport layer 4 contains C 60 At least one of BCP (dicyclopentadiene), titanium dioxide (TiO2), tin oxide (SnO2), zinc oxide (ZnO), and PCBM ([6,6]-phenyl-C61-butyrate methyl ester); the metal layer 5 contains at least one of bismuth metal and vanadium metal, specifically including at least one of bismuth metal thin film, vanadium metal thin film, alloy thin film containing bismuth metal, alloy thin film containing vanadium metal, composite thin film containing bismuth metal, or composite thin film containing vanadium metal, the thickness of the metal layer 5 is 1nm~20nm, and the sheet resistance is ≤13Ω / cm. 2The light transmittance is 90%~95%; the transparent conductive oxide layer 6 includes at least one of indium tin oxide (ITO) film, germanium-doped indium tin oxide (IGZO) film, aluminum-doped indium tin oxide (IAO) film, indium tin zinc oxide (ITZO) film, or indium tin gallium oxide (ITGO) film, and the thickness of the transparent conductive oxide layer 6 is 13nm~18nm; the second hole transport layer 7 contains a self-assembled monolayer film material, PEDOT:PSS (a high-molecular-weight polymer formed by poly(3,4-ethylenedioxythiophene) and polystyrene sulfonate). The perovskite layer 8 contains at least one of the following: nickel oxide (NiO), molybdenum oxide (MoO3), PTAA (poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine]), Spiro-OMeTAD (2,2',7,7'-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirodifluorene), and Poly-TPD (4-but-N,N-diphenylaniline homopolymer); the narrow bandgap perovskite layer 8 has a bandgap of 1.2 eV to 1.4 eV; the second electron transport layer 9 contains C 60 BCP (dicyclopentadiene), titanium dioxide (TiO2), tin oxide (SnO2), zinc oxide (ZnO), PCBM ([6,6]-phenyl-C 61 At least one of (-methyl butyrate); the second electrode layer 10 contains metallic silver.

[0051] Example 4

[0052] A tandem photovoltaic module is basically the same as that in Example 3, except that the thickness of the metal layer 5 is 1nm~15nm.

[0053] Example 5

[0054] A type of tandem photovoltaic module, such as Figure 2 As shown, the structure includes the following layers stacked from bottom to top: a first battery cell, a metal layer 5, and a second battery cell. Specifically, it consists of the following layers stacked from bottom to top: a first electrode layer 1, a first hole transport layer 2, a wide bandgap perovskite layer 3, a first electron transport layer 4, a metal layer 5, a transparent conductive oxide layer 6, a second hole transport layer 7, a narrow bandgap perovskite layer 8, a second electron transport layer 9, and a second electrode layer 10. The metal layer 5 and the transparent conductive oxide layer 6 together form the composite layer of the multilayer photovoltaic module.

[0055] In this design, the first electrode layer 1 is an indium tin oxide thin film, the first hole transport layer 2 is a PTAA thin film (the PTAA thin film is coated with aluminum oxide to increase wettability), the wide bandgap perovskite layer 3 has a bandgap of 1.78 eV, and the first electron transport layer 4 has a thickness of 50 nm, composed of C 60 Composed of thin film and SnO2 thin film (C 60The thin film is connected to the wide-bandgap perovskite layer 3, and the SnO2 thin film is connected to the metal layer 5; the metal layer 5 is a bismuth metal thin film with a thickness of 5 nm and a sheet resistance of 13 Ω / cm. 2 The light transmittance is 91.5%; the transparent conductive oxide layer 6 is a 15nm thick indium tin oxide film, the second hole transport layer 7 is a 45nm thick PEDOT:PSS film, the narrow bandgap perovskite layer 8 has a bandgap of 1.24eV; the second electron transport layer 9 has a thickness of 50nm and is made of C 60 Composed of thin film and SnO2 thin film (C 60 The thin film is connected to the narrow bandgap perovskite layer 8, and the SnO2 thin film is connected to the second electrode layer 10; the second electrode layer 10 is a 150 nm thick metallic silver thin film. The efficiency of this tandem photovoltaic module is 23.38%, the fill factor is 78.94%, the open-circuit voltage is 1.97 V, and the short-circuit current is 15.04 mA.

[0056] Example 6

[0057] A type of tandem photovoltaic module, such as Figure 2 As shown, the structure includes the following layers stacked from bottom to top: a first battery cell, a metal layer 5, and a second battery cell. Specifically, it consists of the following layers stacked from bottom to top: a first electrode layer 1, a first hole transport layer 2, a wide bandgap perovskite layer 3, a first electron transport layer 4, a metal layer 5, a transparent conductive oxide layer 6, a second hole transport layer 7, a narrow bandgap perovskite layer 8, a second electron transport layer 9, and a second electrode layer 10. The metal layer 5 and the transparent conductive oxide layer 6 together form the composite layer of the multilayer photovoltaic module.

[0058] In this design, the first electrode layer 1 is an indium tin oxide thin film, the first hole transport layer 2 is a PTAA thin film (the PTAA thin film is coated with aluminum oxide to increase wettability), the wide bandgap perovskite layer 3 has a bandgap of 1.78 eV, and the first electron transport layer 4 has a thickness of 50 nm, composed of C 60 Composed of thin film and SnO2 thin film (C 60 The thin film is connected to the wide-bandgap perovskite layer 3, and the SnO2 thin film is connected to the metal layer 5; the metal layer 5 is a vanadium metal thin film with a thickness of 8 nm and a sheet resistance of 12 Ω / cm. 2 The light transmittance is 93%; the transparent conductive oxide layer 6 is a 15nm thick indium tin oxide film, the second hole transport layer 7 is a 45nm thick PEDOT:PSS film, the narrow bandgap perovskite layer 8 has a bandgap of 1.24eV; the second electron transport layer 9 has a thickness of 50nm and is made of C 60 Composed of thin film and SnO2 thin film (C 60The thin film is connected to the narrow bandgap perovskite layer 8, and the SnO2 thin film is connected to the second electrode layer 10; the second electrode layer 10 is a 150 nm thick metallic silver thin film. The efficiency of this tandem photovoltaic module is 24%, the fill factor is 80.87%, the open-circuit voltage is 1.99 V, and the short-circuit current is 14.93 mA.

[0059] Comparative Example 1

[0060] A stacked photovoltaic module includes the following structures stacked sequentially from bottom to top: a first electrode layer 1, a first hole transport layer 2, a wide bandgap perovskite layer 3, a first electron transport layer 4, a transparent conductive oxide layer 6, a second hole transport layer 7, a narrow bandgap perovskite layer 8, a second electron transport layer 9, and a second electrode layer 10.

[0061] In this design, the first electrode layer 1 is an indium tin oxide thin film, the first hole transport layer 2 is a PTAA thin film (the PTAA thin film is coated with aluminum oxide to increase wettability), the wide bandgap perovskite layer 3 has a bandgap of 1.78 eV, and the first electron transport layer 4 has a thickness of 50 nm, composed of C 60 Composed of thin film and SnO2 thin film (C 60 The thin film is connected to the wide-bandgap perovskite layer 3, and the SnO2 thin film is connected to the metal layer 5; the transparent conductive oxide layer 6 is a 15 nm thick indium tin oxide thin film; the second hole transport layer 7 is a 45 nm thick PEDOT:PSS thin film; the bandgap of the narrow-bandgap perovskite layer 8 is 1.24 eV; the thickness of the second electron transport layer 9 is 50 nm, and it is made of C 60 Composed of thin film and SnO2 thin film (C 60 The thin film is connected to the narrow bandgap perovskite layer 8, and the SnO2 thin film is connected to the second electrode layer 10; the second electrode layer 10 is a 150 nm thick metallic silver thin film. The efficiency of this tandem photovoltaic module is 15.87%, the fill factor is 66.38%, the open-circuit voltage is 1.89 V, and the short-circuit current is 12.66 mA.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A laminated photovoltaic module, characterized by, The stack photovoltaic module comprises, from bottom to top, a first battery unit, a metal layer (5) and a second battery unit; the metal layer (5) is a bismuth metal film or a vanadium metal film; the stack photovoltaic module specifically comprises, from bottom to top, a first electrode layer (1), a first hole transport layer (2), a wide-bandgap perovskite layer (3), a first electron transport layer (4), the metal layer (5), a transparent conductive oxide layer (6), a second hole transport layer (7), a narrow-bandgap perovskite layer (8), a second electron transport layer (9) and a second electrode layer (10); the metal layer (5) and the transparent conductive oxide layer (6) jointly form a composite layer of the stack photovoltaic module.

2. The laminated photovoltaic assembly of claim 1, wherein, The first electrode layer (1) is an indium tin oxide film; the first hole transport layer (2) is a PTAA film, and alumina is coated on the PTAA film to increase wettability; the wide-bandgap perovskite layer (3) has a band gap of 1.78 eV; the first electron transport layer (4) has a thickness of 50 nm and is composed of a C 60 film and a SnO2 film; the C 60 film is connected to the wide-bandgap perovskite layer (3), and the SnO2 film is connected to the metal layer (5); the second hole transport layer (7) is a 45-nm-thick PEDOT:PSS film; the narrow-bandgap perovskite layer (8) has a band gap of 1.24 eV; the second electron transport layer (9) has a thickness of 50 nm and is composed of a C 60 film and a SnO2 film; and the C 60 film is connected to the narrow-bandgap perovskite layer (8), and the SnO2 film is connected to the second electrode layer (10); and the second electrode layer (10) is a 150-nm-thick metal silver film.

3. The laminated photovoltaic assembly of claim 2, wherein, The metal layer (5) is a bismuth metal film with a thickness of 5 nm, a square resistance of 13 Ω / cm2 and a light transmittance of 91.5%; the transparent conductive oxide layer (6) is an indium tin oxide film with a thickness of 15 nm.

4. The laminated photovoltaic assembly of claim 3, wherein, The stack photovoltaic module has an efficiency of 23.38%, a fill factor of 78.94%, an open circuit voltage of 1.97 V and a short circuit current of 15.04 mA.

5. The laminated photovoltaic assembly of claim 2, wherein, The metal layer (5) is a vanadium metal film with a thickness of 8 nm and a square resistance of 12 Ω / cm 2 , and the transparent conductive oxide layer (6) is an indium tin oxide film with a thickness of 15 nm.

6. The laminated photovoltaic assembly of claim 5, wherein, The stack photovoltaic module has an efficiency of 24%, a fill factor of 80.87%, an open circuit voltage of 1.99 V and a short circuit current of 14.93 mA.

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