Laminated solar cell and photovoltaic module
By introducing an intermediate layer structure of protective layer and encapsulant layer into tandem solar cells, the light loss problem caused by parasitic absorption in the intermediate layer is solved, improving photoelectric conversion efficiency and cell stability, making it suitable for industrial production.
Patent Information
- Application Number
- CN202422926646.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing tandem solar cells suffer from large parasitic absorption in the middle layer, leading to high incident light loss and reduced solar cell conversion efficiency.
The intermediate layer structure consists of a protective layer and an adhesive film layer. The protective layer can reflect the light reflected by the adhesive film layer back to the bottom battery, reducing incident light loss and improving battery stability by protecting the perovskite film.
It effectively reduces incident light loss, improves the photoelectric conversion efficiency of the bottom cell, and enhances the stability of the stacked cell, making it suitable for large-scale industrial production.
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Figure CN223816377U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to solar cell technical field especially relates to a kind of laminated solar cell and photovoltaic module. BACKGROUND
[0002] Solar energy is a kind of renewable energy and clean energy, which is of great significance to the sustainable development of mankind. Laminated solar cell has become an important research direction in the field of solar cell technology due to its high photoelectric conversion efficiency. Because perovskite and silicon have different band gaps, perovskite solar cell as top cell forms laminated solar cell with silicon cell, i.e. perovskite / crystalline silicon laminated solar cell, which can make more full use of solar spectrum. This perovskite / crystalline silicon laminated solar cell not only widens the spectral response range of solar cell and improves the efficiency of solar cell, but also greatly reduces the production cost.
[0003] Perovskite crystalline silicon laminated is divided into two types of two ends and four ends, among them, the process difficulty and production cost of four-end laminated cell are lower, which is more suitable for large-scale industrial production and is a more ideal laminated scheme. In addition to the performance of perovskite cell and crystalline silicon cell, the important factor affecting the photoelectric conversion efficiency of four-end laminated cell is also the material and structure of the intermediate layer. The intermediate layer of the commonly used laminated cell has the problem of large parasitic absorption, which leads to large loss of incident light and reduces the conversion efficiency of solar cell.
[0004] Therefore, it is urgent to develop a new intermediate layer structure of laminated cell to reduce its influence on incident light, improve the efficiency of bottom silicon cell and improve the stability of cell. INVENTION CONTENTS
[0005] Therefore, it is urgent to develop a new intermediate layer structure of laminated cell to reduce its influence on incident light, improve the efficiency of bottom silicon cell and improve the stability of cell.
[0006] A laminated solar cell includes a first cell unit, a protective layer, a glue film layer and a second cell unit arranged in sequence.
[0007] The laminated solar cell described above is composed of a protective layer and a glue film layer to form an intermediate layer of laminated cell, which has low parasitic absorption and can effectively reduce the loss of incident light. Sunlight is incident from the side of the first cell unit, and a part of it is reflected when passing through the glue film layer of the intermediate layer, resulting in a decrease in the light reaching the second cell unit (i.e. bottom cell). The protective layer in the utility model can effectively reflect the light reflected by the glue film layer to the bottom cell, thereby greatly improving the photoelectric conversion efficiency of the bottom cell.
[0008] In one of the embodiments, the protective layer contains at least one of silicone, acrylic, polyurethane, epoxy resin, synthetic rubber, synthetic resin, modified resin. The protective layer can protect and stabilize the perovskite thin film, so that the stacked solar cell has better stability.
[0009] In one of the embodiments, the adhesive film layer includes at least one of a first adhesive film layer, a second adhesive film layer, and a third adhesive film layer.
[0010] In one of the embodiments, the adhesive film layer has a light transmittance of 50% to 70%.
[0011] In one of the embodiments, the stacked solar cell includes a first cell unit, a protective layer, a first adhesive film layer, a second adhesive film layer, a third adhesive film layer, and a second cell unit, which are sequentially stacked.
[0012] In one of the embodiments, the stacked solar cell includes a first cell unit, a protective layer, a first adhesive film layer, and a second cell unit, which are sequentially stacked.
[0013] In one of the embodiments, the stacked solar cell further includes a fourth adhesive film layer, which is disposed on a side of the second cell unit away from the protective layer.
[0014] In one of the embodiments, the protective layer has a thickness of 0.1 mm to 0.5 mm, the first adhesive film layer has a thickness of 0.6 to 1.8 mm, the second adhesive film layer has a thickness of 0.05 mm to 0.1 mm, the third adhesive film layer has a thickness of 0.6 to 1.8 mm, and the fourth adhesive film layer has a thickness of 0.6 to 1.8 mm.
[0015] In one of the embodiments, the first adhesive film layer contains at least one of POE, PET, and PTFE, the second adhesive film layer contains at least one of POE, PET, and PTFE, the third adhesive film layer contains at least one of POE, PET, and PTFE, and the fourth adhesive film layer contains at least one of POE, PET, and PTFE.
[0016] In one of the embodiments, the first cell unit includes a perovskite solar cell, and the second cell unit includes a crystalline silicon solar cell.
[0017] In one of the embodiments, the perovskite solar cell includes a first electrode layer, a first charge transport layer, a perovskite light absorption layer, a second charge transport layer, and a second electrode layer, which are sequentially stacked.
[0018] In one of the embodiments, the first electrode layer is a transparent conductive layer, the transparent conductive layer contains ITO; the first charge transport layer is a hole transport layer, the hole transport layer contains PTAA; the second charge transport layer is an electron transport layer, the electron transport layer contains C 60 and at least one of SnO2; the second electrode layer contains ITO.
[0019] In one of the embodiments, the structure of the perovskite in the perovskite light-absorbing layer is ABX3, wherein A is a monovalent cation, including at least one of formamidinium, methylammonium, cesium or rubidium, B includes at least one of lead, tin or strontium, and X includes at least one of iodine, bromine or chlorine.
[0020] In one of the embodiments, the band gap of the perovskite is 1.4-1.8 eV.
[0021] In one of the embodiments, the thickness of the perovskite light-absorbing layer is 500-900 nm.
[0022] In one of the embodiments, the crystalline silicon cell is a single-crystalline silicon topcon cell or a HJT cell.
[0023] In one of the embodiments, the crystalline silicon cell is a single-crystalline silicon topcon cell.
[0024] In one of the embodiments, the laminated solar cell is a four-terminal perovskite / crystalline silicon laminated solar cell.
[0025] The utility model also provides a photovoltaic module, including the laminated solar cell as described above.
[0026] Compared with the prior art, the utility model has the following beneficial effects:
[0027] The laminated solar cell and the photovoltaic module of the utility model are composed of the intermediate layer of the laminated cell by the protective layer and the adhesive film layer, the parasitic absorption of the intermediate layer is low, and the loss of incident light can be effectively reduced. When the sunlight is incident from the first cell unit side, a part of the light is reflected by the adhesive film layer of the intermediate layer, so that the light reaching the second cell unit (i.e. the bottom cell) is reduced, and the protective layer in the utility model can effectively reflect the light reflected by the adhesive film layer to the bottom cell again, so that the photoelectric conversion efficiency of the bottom cell is greatly improved. At the same time, the protective layer can protect and stabilize the perovskite film, so that the laminated cell has better stability. The utility model has simple structure and is easy to mass industrial production. BRIEF DESCRIPTION OF DRAWINGS
[0028] Figure 1 It is a structural schematic view of the laminated cell in embodiment 1.
[0029] Figure 2 Structure diagram of the laminated battery in Example 2;
[0030] Figure 3 Structure diagram of the laminated battery in Example 3;
[0031] Figure 4 Structure diagram of the laminated battery in Example 4.
[0032] The figure mark explanation: 1, the antireflection film layer; 2, the first battery unit; 21, the electrode of perovskite battery; 22, perovskite battery; 23, front plate glass; 3, protective layer; 4, first adhesive film layer; 5, second adhesive film layer; 6, third adhesive film layer; 7, second battery unit; 71, single crystal silicon topcon battery; 72, the electrode of crystalline silicon battery; 8, fourth adhesive film layer; 9, back plate glass; 10, silver plating layer; 11, back return glass layer; 12, edge encapsulation layer. DETAILED DESCRIPTION
[0033] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.
[0034] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element.
[0035] 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 the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0036] Example 1: A laminated solar cell, as shown in Figure 1 includes the following structures arranged in sequence: an antireflection film layer 1, a first battery unit 2, a protective layer 3, a first adhesive film layer 4, a second adhesive film layer 5, a third adhesive film layer 6, a second battery unit 7, a fourth adhesive film layer 8, a back plate glass 9, a silver-coated glass (a silver plating layer 10 + a back return glass layer 11); and an edge encapsulation layer 12.
[0037] The first battery unit 2 is composed of a perovskite battery 22 and an electrode 21 of the perovskite battery; the protective layer 3 is a silicone glue layer with a thickness of about 0.1 mm; the first glue film layer 4 is a POE layer with a thickness of about 0.6 mm; the second glue film layer 5 is a PET layer with a thickness of about 0.05 mm; the third glue film layer 6 is a POE layer with a thickness of about 0.6 mm; the second battery unit 7 is composed of a single crystal silicon topcon battery 71 and an electrode 72 of the crystalline silicon battery; and the fourth glue film layer 8 is a POE layer with a thickness of about 0.6 mm.
[0038] The perovskite battery 22 has a structure of a front plate glass 23, an ITO transparent conductive layer, a PTAA hole transport layer, a perovskite light absorption layer, a C 60 and SnO2 electron transport layer, and an ITO top electrode layer, which are sequentially and laminatedly arranged.
[0039] The perovskite light absorption layer has a band gap of 1.6 eV, and a thickness of about 700 nm.
[0040] Embodiment 2: A laminated solar cell, as shown in Figure 2 The laminated solar cell comprises the following structures which are sequentially and laminatedly arranged: an anti-reflection film layer 1, a first battery unit 2, a protective layer 3, a first glue film layer 4, a second battery unit 7, a fourth glue film layer 8, a back plate glass 9, and silver-coated glass (a silver-coated layer 10+back plate glass layer 11); and further comprises an edge encapsulation layer 12.
[0041] The first battery unit 2 is composed of a perovskite battery 22 and an electrode 21 of the perovskite battery; the protective layer 3 is a polyurethane layer with a thickness of 0.3 mm; the first glue film layer 4 is a POE layer with a thickness of 1.2 mm; the second battery unit 7 is composed of a single crystal silicon topcon battery 71 and an electrode 72 of the crystalline silicon battery; and the fourth glue film layer 8 is a POE layer with a thickness of 1.2 mm.
[0042] The perovskite battery 22 has a structure of a front plate glass 23, an ITO transparent conductive layer, a PTAA hole transport layer, a perovskite light absorption layer, a C 60 and SnO2 electron transport layer, and an ITO top electrode layer, which are sequentially and laminatedly arranged.
[0043] The perovskite light absorption layer has a band gap of 1.6 eV, and a thickness of about 700 nm.
[0044] Embodiment 3: A laminated solar cell, as shown in Figure 3 The laminated solar cell comprises the following structures which are sequentially and laminatedly arranged: an anti-reflection film layer 1, a first battery unit 2, a protective layer 3, a first glue film layer 4, a second glue film layer 5, a third glue film layer 6, a second battery unit 7, a fourth glue film layer 8, a back plate glass 9, and silver-coated glass (a silver-coated layer 10+back plate glass layer 11); and further comprises an edge encapsulation layer 12.
[0045] The first battery unit 2 is composed of a perovskite battery 22 and an electrode 21 of the perovskite battery; the protective layer 3 is an epoxy resin layer with a thickness of 0.3 mm; the first adhesive film layer 4 is a POE layer with a thickness of 1.2 mm; the second adhesive film layer 5 is a PET layer with a thickness of 0.07 mm; the third adhesive film layer 6 is a POE layer with a thickness of 1.2 mm; the second battery unit 7 is composed of a monocrystalline silicon topcon battery 71 and an electrode 72 of the crystalline silicon battery; and the fourth adhesive film layer 8 is a POE layer with a thickness of 1.2 mm.
[0046] The perovskite battery 22 has a structure of a front plate glass 23, an ITO transparent conductive layer, a PTAA hole transport layer, a perovskite light absorption layer, a C 60 an electron transport layer of SnO2, and an ITO top electrode layer.
[0047] The perovskite light absorption layer has a band gap of 1.6 eV, and the thickness of the perovskite light absorption layer is 700 nm.
[0048] Example 4: A laminated solar cell, as shown in the figure, comprises the following structures which are sequentially stacked: an anti-reflection film layer 1, a first battery unit 2, a protective layer 3, a first adhesive film layer 4, a second battery unit 7, a fourth adhesive film layer 8, a back plate glass 9, and a silver-plated glass (a silver-plated layer 10 + a back plate glass layer 11); and further comprises an edge sealing layer 12. Figure 4
[0049] The first battery unit 2 is composed of a perovskite battery 22 and an electrode 21 of the perovskite battery; the protective layer 3 is a mixed layer of boron nitride and organic silicone adhesive, and the mass fraction of boron nitride is 10%, and the thickness of the protective layer 3 is 0.3 mm; the first adhesive film layer 4 is a POE layer with a thickness of 1.2 mm; the second battery unit 7 is composed of a monocrystalline silicon topcon battery 71 and an electrode 72 of the crystalline silicon battery; and the fourth adhesive film layer 8 is a POE layer with a thickness of 1.2 mm.
[0050] The perovskite battery 22 has a structure of a front plate glass 23, an ITO transparent conductive layer, a PTAA hole transport layer, a perovskite light absorption layer, a C 60 an electron transport layer of SnO2, and an ITO top electrode layer.
[0051] The perovskite light absorption layer has a band gap of 1.6 eV, and the thickness of the perovskite light absorption layer is 700 nm.
[0052] Experimental Example: The light transmittance of the adhesive film layer between the protective layer 3 and the second cell unit 7 in Examples 1-4 was detected by using a UV-vis tester. The detection results are as follows: the light transmittance of the adhesive film layer (the first adhesive film layer 4+the second adhesive film layer 5+the third adhesive film layer 6) in Example 1 is 53%, the light transmittance of the first adhesive film layer 4 in Example 2 is 65%, the light transmittance of the adhesive film layer (the first adhesive film layer 4+the second adhesive film layer 5+the third adhesive film layer 6) in Example 3 is 55%, and the light transmittance of the adhesive film layer in Example 4 is 66%.
[0053] The photoelectric conversion efficiency (E ff ) of the laminated solar cell in Examples 1-4 was detected by using a solar steady-state simulator. The detection results are shown in Table 1.
[0054] Table 1: Detection results of the laminated solar cell
[0055]
[0056] The technical features of the above-described examples can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-described examples are not described, however, as long as the combinations of the technical features do not contradict each other, they should be considered as the scope of the present disclosure.
[0057] The above-described examples only express several embodiments of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.
Claims
1. A stacked solar cell, characterized by, The laminated solar cell comprises a first battery unit (2), a protective layer (3), a glue film layer and a second battery unit (7) which are sequentially stacked; the glue film layer comprises a first glue film layer (4), a second glue film layer (5) and a third glue film layer (6); the first glue film layer (4) is a POE layer with a thickness of about 0.6mm or 1.2mm; the second glue film layer (5) is a PET layer with a thickness of about 0.05mm or 0.07mm; the third glue film layer (6) is a POE layer with a thickness of about 0.6mm or 1.2mm; the protective layer (3) is a silicone glue layer or a polyurethane layer or an epoxy resin layer.
2. The tandem solar cell according to claim 1, characterized in that, When the protective layer (3) is a silicone glue layer, the thickness is 0.1mm.
3. The tandem solar cell according to claim 1, wherein When the protective layer (3) is a polyurethane layer or an epoxy resin layer, the thickness is 0.3mm.
4. The tandem solar cell according to claim 1, wherein The first battery unit (2) is composed of a perovskite battery (22) and an electrode (21) of the perovskite battery.
5. The tandem solar cell according to claim 4, wherein The perovskite battery (22) has a structure of a front plate glass (23), an ITO transparent conductive layer, a PTAA hole transport layer, a perovskite light absorption layer, an electron transport layer and an ITO top electrode layer which are sequentially stacked; the band gap of the perovskite light absorption layer is 1.6eV; the thickness of the perovskite light absorption layer is about 700nm.
6. The tandem solar cell according to claim 1, wherein The second battery unit (7) is composed of a single crystal silicon topcon battery (71) and an electrode (72) of the single crystal silicon battery.
7. A photovoltaic module, characterized by The laminated solar cell comprises the laminated solar cell according to any one of claims 1-6.