Solar cell module and power generation device

Abstract

The utility model relates to a solar cell module and a power generation device. A solar cell module comprises a supporting layer, a solar cell and a sealing layer which are sequentially stacked from bottom to top. According to the solar cell module and the power generation device, the sealing layer is arranged on the surface of the solar cell, so that the sealing layer has good moisture-proof, oxygen-proof and other protection effects on perovskite, and inherent and external stressors of a device can be effectively isolated on the premise of not sacrificing the electrical and optical characteristics of the solar cell; and meanwhile, the sealing layer also becomes a temporary protection structure of an unpackaged battery assembly, so that the perovskite film layer of the battery is prevented from being damaged due to factors of an external environment in a long-period experiment or transportation process.

Description

TECHNICAL FIELD

[0001] The utility model relates to solar cell technical field especially relates to a solar cell module and power generation device. BACKGROUND

[0002] Metal halide perovskite solar cells (PSCs) have attracted extensive attention due to their low cost and high efficiency. Encapsulation is a common method to protect the perovskite light-absorbing layer of perovskite solar cells from degradation caused by water and oxygen. This method can greatly avoid the adverse effects of water and oxygen on the output power, service life, and stability of the module. It can also effectively protect the perovskite solar cells from damage during transportation. Common encapsulation materials include EVA film and butyl rubber.

[0003] However, the inherent instability of perovskite is caused by light and thermal stress sources. Existing encapsulation techniques cannot solve this problem without sacrificing the electrical and optical properties of perovskite solar cells. During the development of perovskite solar cells, most experiments need to be conducted on unencapsulated cells. If the experimental period is too long, the perovskite light-absorbing layer is easily degraded by water and oxygen. If the cells need to be transported during the experiment, they are also easily damaged.

[0004] Therefore, there is an urgent need to develop a new protection structure for perovskite solar cells to solve the problem of perovskite instability caused by light and thermal stress sources without sacrificing the electrical and optical properties of perovskite solar cells. It can also provide temporary protection for the cells before encapsulation. SUMMARY

[0005] Therefore, it is necessary to provide a solar cell module and a power generation device to solve the problem of perovskite instability caused by light and thermal stress sources.

[0006] A solar cell module includes a support layer, a solar cell, and a sealing layer stacked in order from bottom to top.

[0007] The above-mentioned solar cell module has a sealing layer on the surface of the solar cell, which has good moisture-proof and oxygen-proof protection effects on perovskite. It can also effectively isolate the inherent and external stress sources of the device without sacrificing the electrical and optical properties of the solar cell. At the same time, the sealing layer becomes a temporary protection structure for unencapsulated cell modules, preventing the perovskite film layer of the cell from being damaged by external environmental factors during long-term experiments or transportation.

[0008] In one embodiment, the sealing layer contains at least one of silicone, acrylic, polyurethane, epoxy resin, synthetic rubber, synthetic resin, and modified resin.

[0009] The solar cell module can be further subjected to traditional packaging operation. The sealing layer can effectively avoid side reactions between the packaging material and the perovskite, thereby reducing the stability of the solar cell. Moreover, the sealing layer has better light transmittance, and does not affect the conversion efficiency of the solar cell. Meanwhile, the material selected for the sealing layer can be solidified and formed at a relatively low temperature, and heating is not required in the preparation process, thereby avoiding damage to the perovskite caused by high temperature. The use of the sealing layer expands the selection range of the packaging material and the packaging type of the perovskite solar cell.

[0010] In one of the embodiments, the thickness of the sealing layer is 0.1mm-0.5mm.

[0011] In one of the embodiments, the solar cell module further comprises an electrode, and the electrode is arranged at two ends of the solar cell.

[0012] In one of the embodiments, a current lead is connected to the electrode, and the current lead penetrates the sealing layer.

[0013] In one of the embodiments, the sealing layer at least covers the exposed surface of the solar cell.

[0014] In one of the embodiments, the sealing layer further covers the exposed part of the upper surface of the support layer and / or the exposed part of the side surface of the support layer.

[0015] In one of the embodiments, the support layer is a glass layer.

[0016] In one of the embodiments, the solar cell is a perovskite solar cell, and the perovskite solar cell comprises a transparent conductive layer, a hole transport layer, a perovskite light-absorbing layer, an electron transport layer, and an electrode layer which are sequentially stacked.

[0017] In one of the embodiments, the band gap of the perovskite solar cell is 1.4-1.8eV.

[0018] In one of the embodiments, the perovskite solar cell is a weak-light perovskite solar cell.

[0019] In one of the embodiments, the band gap of the perovskite solar cell is 1.56-1.73eV.

[0020] 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 methylamine, formamidinium, cesium, and rubidium, B includes at least one of lead, tin, or strontium, and X includes at least one of iodine, bromine, and chlorine.

[0021] The utility model also provides a kind of power generation device, including the solar cell module as described above.

[0022] Compared with prior art, the utility model has the following beneficial effects:

[0023] The solar cell module and the power generation device of the utility model, a sealing layer is arranged on the surface of the solar cell, which has good protection effects such as moisture-proof and oxygen-proof on perovskite, and can effectively isolate the inherent and external stress sources of the device without sacrificing the electrical and optical properties of the solar cell; at the same time, the sealing layer also becomes a temporary protection structure for the unpackaged solar cell module, which prevents the perovskite film of the solar cell from being damaged due to external environmental factors during a long-term experiment or transportation process. The solar cell module of the utility model can also be further subjected to traditional packaging operation. The sealing layer can effectively prevent side reactions between the packaging material and the perovskite, thereby reducing the stability of the solar cell, and has better light transmittance, without affecting the conversion efficiency of the solar cell; at the same time, the material selected for the sealing layer can be cured and formed at a relatively low temperature, without the need for heating during preparation, which can avoid damage to the perovskite caused by high temperature. The use of the sealing layer expands the selection range of the packaging material and the packaging type of the perovskite solar cell. In the utility model, only the sealing layer is added to form temporary protection for the solar cell, and compared with the traditional packaging structure, the temporary protection structure has lower production cost and simpler process, and is extremely suitable for mass production, especially suitable for application in the production of four-terminal laminated solar cell modules. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 is a cross-sectional structure schematic view of the solar cell module in the utility model;

[0025] Fig. 2 is a top view structure schematic view of the solar cell module in the utility model;

[0026] Fig. 3 is a bottom view structure schematic view of the solar cell module in the utility model.

[0027] Mark 1, support layer; 2, solar cell; 3, electrode; 31, lead-out welding point; 4, sealing layer. DETAILED DESCRIPTION

[0028] In order to facilitate understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. The preferred embodiments of the utility model are shown in the drawings. However, the utility model can be realized 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 understanding of the disclosure of the utility model more thorough and comprehensive.

[0029] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present.

[0030] 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 application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use herein of "and / or" means any one or all possible combinations of one or more of the associated listed items.

[0031] Embodiment 1

[0032] A solar cell module, as shown in Figs. 1-3 includes a support layer 1, a solar cell 2 and a sealing layer 4 which are sequentially stacked from bottom to top; further includes an electrode 3, the electrode 3 is arranged at both ends of the solar cell 2, and a current lead is connected to the lead-out welding point 31 of the electrode 3, and the current lead penetrates the sealing layer 4. The sealing layer 4 covers the exposed surface of the solar cell 2, and also covers the exposed part of the upper surface and the exposed part of the side surface of the support layer 1. The thickness of the sealing layer 4 is 0.1mm; the sealing layer 4 is an organic silicone glue layer. The support layer 1 is a glass layer.

[0033] The solar cell 2 is a perovskite solar cell, which includes a 20nm-thick PTAA hole transport layer, a perovskite light absorption layer (with a band gap of 1.6eV), a 60nm-thick C 60 electron transport layer and a 30nm-thick silver electrode layer which are sequentially stacked.

[0034] Embodiment 2

[0035] A solar cell module, as shown in Figs. 1-3 includes a support layer 1, a solar cell 2 and a sealing layer 4 which are sequentially stacked from bottom to top; further includes an electrode 3, the electrode 3 is arranged at both ends of the solar cell 2, and a current lead is connected to the lead-out welding point 31 of the electrode 3, and the current lead penetrates the sealing layer 4. The sealing layer 4 covers the exposed surface of the solar cell 2, and also covers the exposed part of the upper surface and the exposed part of the side surface of the support layer 1. The thickness of the sealing layer 4 is 0.1mm; the sealing layer 4 is an organic silicone glue layer. The support layer 1 is a glass layer.

[0036] The solar cell 2 is a perovskite solar cell, which includes a 20nm-thick PTAA hole transport layer, a perovskite light absorption layer (with a band gap of 1.6eV), a 60nm-thick C 60 electron transport layer and a 30nm-thick silver electrode layer which are sequentially stacked.

[0037] Example 3

[0038] A solar cell module, as shown in the structure of Figs. 1-3 The solar cell module includes a support layer 1, a solar cell 2 and a sealing layer 4, which are sequentially stacked from bottom to top. The module also includes electrodes 3, which are arranged at both ends of the solar cell 2. The electrodes 3 are connected with current collecting bars, and the current collecting bars penetrate through the sealing layer 4. The sealing layer 4 covers the exposed surface of the solar cell 2, and also covers the exposed part of the upper surface and the exposed part of the side surface of the support layer 1. The thickness of the sealing layer 4 is 0.5 mm. The sealing layer 4 is a mixed layer of silicone glue and acrylic acid, and the weight ratio of the silicone glue to the acrylic acid is 9:1. The support layer 1 is a glass layer.

[0039] The solar cell 2 is a perovskite solar cell, which includes a 20 nm thick PTAA hole transport layer, a perovskite light absorption layer (with a band gap of 1.6 eV), a 60 nm C 60 electronic transport layer and a 30 nm silver electrode layer, which are sequentially stacked.

[0040] Example 4

[0041] A weak light type solar cell module, as shown in the structure of Figs. 1-3 The solar cell module includes a support layer 1, a solar cell 2 and a sealing layer 4, which are sequentially stacked from bottom to top. The module also includes electrodes 3, which are arranged at both ends of the solar cell 2. The electrodes 3 are connected with current collecting bars, and the current collecting bars penetrate through the sealing layer 4. The sealing layer 4 covers the exposed surface of the solar cell 2, and also covers the exposed part of the upper surface and the exposed part of the side surface of the support layer 1. The thickness of the sealing layer 4 is 0.1 mm. The sealing layer 4 is an epoxy resin layer. The support layer 1 is a glass layer.

[0042] The solar cell 2 is a weak light type perovskite solar cell, which includes a 20 nm thick PTAA hole transport layer, a perovskite light absorption layer (with a band gap of 1.6 eV), a 60 nm C 60 electronic transport layer and a 30 nm silver electrode layer, which are sequentially stacked.

[0043] Example 5

[0044] A weak light type solar cell module, as shown in the structure of Figs. 1-3As shown, it comprises, from bottom to top, a support layer 1, a solar cell 2 and a sealing layer 4 which are sequentially stacked; it also comprises electrodes 3 which are arranged at both ends of the solar cell 2, and a current lead connected to the lead-in welding point 31 of the electrode 3, the current lead penetrating through the sealing layer 4. The sealing layer 4 covers the exposed surface of the solar cell 2, and also covers the exposed part on the upper surface and the exposed part on the side surface of the support layer 1. The thickness of the sealing layer 4 is 0.3mm; the sealing layer 4 is a mixed layer of organic silicone glue, polyurethane and modified resin, and the mass ratio of the organic silicone glue, polyurethane and modified resin is 5:3:2. The support layer 1 is a glass layer.

[0045] The solar cell 2 is a weak light type perovskite solar cell, which comprises, sequentially stacked, a 20nm thick PTAA hole transport layer, a perovskite light absorption layer (band gap is 1.6eV), a 60nm C 60 electronic transport layer and a 30nm silver electrode layer.

[0046] Example 6

[0047] A weak light type solar cell module, the structure is as shown in Figs. 1-3 As shown, it comprises, from bottom to top, a support layer 1, a solar cell 2 and a sealing layer 4 which are sequentially stacked; it also comprises electrodes 3 which are arranged at both ends of the solar cell 2, and a current lead connected to the lead-in welding point 31 of the electrode 3, the current lead penetrating through the sealing layer 4. The sealing layer 4 covers the exposed surface of the solar cell 2, and also covers the exposed part on the upper surface and the exposed part on the side surface of the support layer 1. The thickness of the sealing layer 4 is 0.3mm; the sealing layer 4 is a mixed layer of organic silicone glue, polyurethane and modified resin, and the mass ratio of the organic silicone glue, polyurethane and modified resin is 5:3:2. The support layer 1 is a glass layer.

[0048] The solar cell 2 is a weak light type perovskite solar cell, which comprises, sequentially stacked, a 20nm thick PTAA hole transport layer, a perovskite light absorption layer (band gap is 1.6eV), a 60nm C 60 electronic transport layer and a 30nm silver electrode layer.

[0049] The preparation method of the solar cell module in examples 1-6: prepare the solar cell 2 on the support layer 1 of glass, with the support layer 1 facing down and the film layer facing up, first weld a current lead on both sides of the positive and negative electrodes 3, and then uniformly coat a sealing layer material on the surface of the cell film layer and the exposed part of the glass facing up and the four side surfaces by means of scraping, spraying, silk printing and the like, and take it out after curing for 30 minutes in a 33℃ vacuum heat preservation moisture-proof box.

[0050] Experimental example

[0051] The solar cell modules (area is 21cm2 The change of electrical properties before and after setting the sealing layer 4 is shown in Table 1.

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[0055]

[0056]

[0057]

[0058] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict each other, they should be considered within the scope of the present disclosure.

[0059] The above-described embodiments only express several implementation manners 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 pointed out that, for those skilled 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 protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A solar cell module, characterized in that, The structure includes a support layer (1), a solar cell (2), an electrode (3), and a sealing layer (4) stacked sequentially from bottom to top. The electrode (3) is located at both ends of the solar cell (2). A lead-out welding point (31) of the electrode (3) is connected to a drain strip, which penetrates the sealing layer (4). The sealing layer (4) covers the exposed surface of the solar cell (2) and also covers the exposed parts of the upper surface and the exposed parts of the side surface of the support layer (1). The sealing layer (4) is an epoxy resin layer, a polyurethane layer, or an organic silicone layer. The support layer (1) is a glass layer.

2. The solar cell module according to claim 1, characterized in that, The sealing layer (4) has a thickness of 0.1 mm, 0.3 mm, or 0.5 mm.

3. The solar cell module according to claim 1, characterized in that, The sealing layer (4) is an epoxy resin layer; the sealing layer (4) has a thickness of 0.1 mm.

4. The solar cell module according to claim 1, characterized in that, The solar cell is a perovskite solar cell; the perovskite solar cell includes a transparent conductive layer, a hole transport layer, a perovskite light-absorbing layer, an electron transport layer, and an electrode layer stacked sequentially.

5. The solar cell module according to claim 4, characterized in that, The perovskite solar cell has a band gap of 1.4~1.8 eV.

6. The solar cell module according to claim 5, characterized in that, The perovskite solar cell has a band gap of 1.56~1.73 eV.

7. The solar cell module according to claim 4, characterized in that, The solar cell (2) is a low-light perovskite solar cell.

8. The solar cell module according to claim 7, characterized in that, The low-light perovskite solar cell comprises a 20nm thick PTAA hole transport layer, a perovskite light-absorbing layer with a band gap of 1.6eV, and a 60nm C layer stacked sequentially. 60 Electron transport layer, 30nm silver electrode layer.

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