Perovskite solar cell module and packaging method thereof

Abstract

The present invention provides a perovskite solar cell assembly and a packaging method thereof, wherein the cell assembly comprises: a bottom substrate; a plurality of perovskite solar cell modules connected in series and parallel, arranged in a matrix on the bottom substrate; a surrounding encapsulation glue, arranged around each of the perovskite solar cell modules; and a transparent substrate, covering the perovskite solar cell module, wherein the lower surface of the transparent substrate is formed with a transparent conductive layer sealed and connected to the surrounding encapsulation glue, so that each perovskite solar cell module is sealed in a packaging space surrounded by the bottom substrate, the transparent substrate and the surrounding encapsulation glue. The positive and negative connection terminals of each battery are arranged outside the four-side encapsulation glue of each battery to realize the series and parallel connection between adjacent batteries, and at the same time realize the independent encapsulation of each battery, so that the encapsulation effect of the single-chip battery can be enhanced, the overall encapsulation effect is good, and it can be replaced separately in case of failure.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic technology, and in particular to a perovskite solar cell assembly and a packaging method thereof. Background Art

[0002] Since its invention in 2009, perovskite solar cells have attracted extensive attention from researchers and the industry in the field of solar power generation technology around the world due to their advantages such as abundant earth reserves of elements, simple preparation process, and high conversion efficiency. They are expected to become the core technology for cheap solar power generation, fully demonstrating their good commercial prospects and great potential market value. However, the stability and device size enlargement of perovskite solar cells have always been the key problems restricting their high-efficiency commercial application. At present, substantial progress has been made in the preparation technology of large-size perovskite cells. However, in order to further prepare large-size perovskite cell modules, adjust their voltage and output power, and connect them to photovoltaic inverters to achieve power output and access the power grid, the perovskite cell units need to be connected in series and parallel and further packaged.

[0003] Generally, the packaging technology of perovskite solar cell modules is similar to the packaging structure of traditional photovoltaic modules, that is, the perovskite solar cell modules arranged in series or parallel matrix are arranged in a sandwich structure between the upper and lower cover plates (usually two glasses or glass + back film), and the surrounding of the battery cell between the upper and lower substrates is filled with a filling film with a thickness similar to that of the battery cell (usually 6-10 layers are required, with a thickness of 3~6mm). The perovskite battery module is bonded to the upper and lower cover plates by laminating, heating and curing through the bonding layer filling material; in addition, since the size of the upper and lower substrate glass of the sandwich structure is larger than the size of the battery FTO glass, additional filling film is required around to make up for the thickness. In order to ensure a certain water-blocking effect, the width of the filling film (i.e., the distance between the upper and lower substrates and the edge of the battery cell) is as wide as possible, and the width is usually 5~10cm. For example, in patent document 1, a photovoltaic module based on perovskite solar cells and a packaging method thereof are provided, and multiple perovskite solar cell modules are connected to the upper and lower cover plates through bonding layers and filling layers to achieve packaging and protection of the perovskite solar cell modules. This structure is to encapsulate multiple series-parallel perovskite solar cell modules as a whole, so the water-blocking effect of the encapsulation material is required to be very high, and the perovskite solar cell unit module usually includes a transparent substrate, and the battery itself has a certain thickness, so the components of this packaging structure usually require thicker and wider filling layer materials to achieve ideal water-blocking and filling effects; in addition, the series-parallel perovskite solar cell modules in this structure are encapsulated as a whole between the upper and lower cover plates. If one of the batteries is damaged, it is difficult to replace, which affects the power generation performance of the entire component.

[0004] Prior art literature:

[0005] Patent document 1: 201810703852.5. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a perovskite solar cell module and a packaging method thereof. A single battery module in a perovskite solar cell module can be easily replaced, thereby solving the problem that if a single perovskite battery module is damaged during use, the power generation performance of the entire module is affected. The structure of the present invention has only one substrate at the bottom, and no additional glue film is required to be filled around it. Since the thickness of the battery itself after removing the glass substrate is only micrometers, only one filling layer (thickness 0.4~0.6mm) is required between the battery cell and the substrate, which solves the problem of requiring thicker and wider filling layer materials in the existing component structure, and has a better water-blocking effect. In addition, the present invention also provides a packaging method for a perovskite solar cell module, which can effectively reduce the attenuation of the photoelectric conversion performance of the perovskite battery during the packaging process.

[0007] The present invention provides a perovskite solar cell module, comprising:

[0008] bottom substrate;

[0009] A plurality of series-parallel perovskite solar cell modules are arranged in a matrix on the bottom substrate;

[0010] A surrounding encapsulation adhesive is disposed around each of the perovskite solar cell modules; and

[0011] A transparent substrate is covered on the perovskite solar cell module, and a transparent conductive layer is formed on the lower surface of the transparent substrate and is sealed with the surrounding encapsulation glue, so that each perovskite solar cell module is sealed in a packaging space surrounded by the bottom substrate, the transparent substrate and the surrounding encapsulation glue.

[0012] The positive and negative connection terminals of each battery are set outside the packaging glue on the four sides of each battery to achieve series and parallel connection between adjacent batteries, while achieving independent packaging of each battery. This can enhance the packaging effect of a single battery. The overall packaging effect is better than a sandwich structure in which all batteries are sealed between an upper and lower substrate, and they can be replaced individually in case of failure.

[0013] Furthermore, the present invention also includes a filling layer disposed between the bottom substrate and the perovskite solar cell module. During the packaging process, the filling layer serves to bond the transparent substrate and the battery module together to ensure the packaging effect. After the packaging is completed, the filling layer also serves to provide a certain degree of protection.

[0014] Furthermore, a gap of 2mm to 5mm is provided between the filling layer and the surrounding encapsulation glue, and a height difference between the bottom of the filling layer and the bottom of the surrounding encapsulation glue is 0.1mm to 0.3mm, thereby preventing the filling layer from overflowing from the encapsulation glue and affecting the encapsulation effect.

[0015] Furthermore, the present invention also includes conductive grid lines distributed on the lower surface of the transparent conductive layer; two main electrodes provided on the transparent conductive layer and connected to the conductive grid lines; and connecting wires connected to the corresponding main electrodes of each of the perovskite solar cell modules. Thus, each perovskite solar cell module is electrically connected to improve conductivity.

[0016] Furthermore, a plurality of the perovskite solar cell modules are connected in series and in parallel via the connecting wires, thereby forming a total battery assembly.

[0017] Furthermore, the present invention also includes a through hole provided on the bottom substrate for the connecting wire to pass through, thereby facilitating the connecting wire to be led out and connected to a junction box or a load.

[0018] Furthermore, the perovskite solar cell module includes a hole blocking layer, an electron transport layer, a perovskite light absorbing layer, a hole transport layer and a counter electrode layer which are arranged in sequence from bottom to top.

[0019] The present invention also provides a packaging method for a perovskite solar cell assembly, comprising:

[0020] Step 1: stacking the bottom substrate, the surrounding encapsulation glue and the perovskite solar cell module in order from bottom to top to obtain a stacked cell;

[0021] Step 2: After heating the laminator heating plate, the stacked batteries are placed in the laminator heating plate, and the stacked batteries are vacuumed, pressurized and laminated by the laminator heating plate to obtain packaged batteries;

[0022] Step 3: Take the packaged battery out from the laminator heating plate and cool it down.

[0023] Furthermore, the perovskite solar cell module uses a material that decomposes at about 85°C, and the temperature at which the laminator heating plate is heated is set to 80°C to 110°C; or, the perovskite solar cell module uses a material that decomposes at about 150°C, and the temperature at which the laminator heating plate is heated is set to 110°C to 160°C. The present invention uses a lamination process for packaging, and sets different lamination temperature parameters for perovskite materials with different thermal stabilities, to ensure that the performance of the battery after lamination is not affected.

[0024] Furthermore, the vacuuming time of the laminator heating plate is set to 3min~6min; the laminating time of the laminator heating plate is set to 8min~15min, and the pressure is set to 30kPa~100kPa. Under this parameter, the filling layer can completely fill the gap between the battery module and the bottom substrate, and is firmly combined with the substrate without bubbles, delamination, etc., to achieve an ideal packaging effect.

[0025] Compared with the prior art, the present invention has the following technical effects:

[0026] (1) The individual battery modules in the perovskite solar cell assembly provided by the present invention are easy to replace, thereby solving the problem that if a single perovskite battery module is damaged during use, the power generation performance of the entire assembly will be affected;

[0027] (2) The perovskite battery assembly provided by the present invention solves the problem of requiring thicker and wider filling layer materials in the existing assembly structure. Furthermore, the structural packaging assembly has a better water-blocking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a cross-sectional view of the perovskite solar cell module in Example 1;

[0029] Figure 2 For Figure 1 An exploded view of the structure of a perovskite solar cell module, a transparent substrate, and a transparent conductive layer;

[0030] Figure 3 is a top view of the perovskite solar cell assembly in Example 1;

[0031] Figure 4 A partial top view of the perovskite solar cell assembly in Example 1;

[0032] Figure 5 is a cross-sectional view of the perovskite solar cell module in Example 2;

[0033] Figure 6 For Figure 5 An exploded view of the structure of a perovskite solar cell module, a transparent substrate, and a transparent conductive layer;

[0034] Figure 7 is a top view of the perovskite solar cell assembly in Example 2;

[0035] Figure 8 is a partial top view of the perovskite solar cell assembly in Example 2;

[0036] Fig. 9 The perovskite solar cell module before and after encapsulation in Example 3 under an irradiance of 50 W / m 2JV curve under LED light source;

[0037] Reference numerals:

[0038] 1. Bottom substrate;

[0039] 2. Filling layer;

[0040] 3a. Transparent substrate;

[0041] 3b, transparent conductive layer;

[0042] 3c, hole blocking layer;

[0043] 3d, electron transport layer;

[0044] 3e, perovskite layer;

[0045] 3f, hole transport layer;

[0046] 3g, counter electrode layer;

[0047] 4. Encapsulation glue all around;

[0048] 5. Conductive main grid line and lead-out terminal;

[0049] 6. Connect the wires;

[0050] 7. Through hole. DETAILED DESCRIPTION

[0051] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention. The dimensions in the figures are only for ease of viewing and are not proportional to the actual dimensions.

[0052] like Figures 1 to 8As shown, the above-mentioned perovskite solar cell assembly includes a bottom substrate 1; a plurality of perovskite solar cell modules connected in series and parallel, arranged in a matrix on the bottom substrate 1; a filling layer 2, filled between the bottom substrate 1 and the perovskite solar cell module; a surrounding encapsulation glue 4, arranged on the upper surface of the bottom substrate 1 and arranged along the edge of each perovskite solar cell module and the filling layer 2; a transparent conductive layer 3b, corresponding to the perovskite solar cell module one by one and covering the corresponding perovskite solar cell module and the surrounding surrounding encapsulation glue 4, and sealed and connected to the upper surface of the surrounding encapsulation glue 4; a transparent substrate 3a, formed on the transparent conductive layer 3b; a total electrode 5 connected to both sides of the lower surface of the transparent conductive layer 3b, because the width of the transparent substrate 3a and the transparent conductive layer 3b is greater than the width of the corresponding surrounding encapsulation glue 4, so that the total electrode 5 is arranged outside the packaging space, that is, arranged on the side of the surrounding encapsulation glue 4 away from the perovskite solar cell module, and a plurality of total electrodes 5 are connected by connecting wires 6 so that a plurality of perovskite solar cell modules are connected in series and parallel.

[0053] The structure has a single perovskite solar cell module that is independently packaged. Compared with the existing solution of packaging multiple perovskite solar cell modules together, on the one hand, since the filling layer 2 does not need to fill and cover the gaps between the perovskite solar cell modules, the amount of filling layer 2 used can be reduced. On the other hand, the water-blocking effect can be improved. When one of the perovskite solar cell modules leaks and fails, only the failed perovskite solar cell module needs to be replaced and repackaged, without replacing and repackaging the entire perovskite solar cell module. In addition, the matrix-arranged perovskite solar cell modules can be connected in series and parallel through connecting wires to obtain the required voltage and output power according to the actual needs of the back-end access system.

[0054] Among them, the filling layer 2 is arranged in the packaging space to fill the gap between the bottom substrate and the perovskite solar cell module, thereby providing support for the perovskite solar cell module. During the packaging process, the filling layer plays the role of bonding the transparent substrate and the battery module together to ensure the packaging effect. After the packaging is completed, the filling layer also plays a certain protective role. The material of the filling layer 2 is polyethylene octene co-elastomer, ethylene-vinyl acetate copolymer, polyvinyl butyral, and / or silicone resin; the thickness of the surrounding packaging glue 4 is greater than the thickness of the filling layer 2, and a gap of 2~5mm is provided between the filling layer 2 and the surrounding packaging glue 4, and the height difference between the bottom of the filling layer 2 and the bottom of the surrounding packaging glue 4 is 0.1~0.3mm, thereby preventing the filling layer from overflowing from the packaging glue and affecting the packaging effect. The width of the packaging glue is 3~10mm, and its material is butyl glue, silica gel, thermoplastic polymer material, UV curing glue or AB component glue.

[0055] The lower surface of the transparent conductive layer 3b is provided with conductive grid lines and a total electrode 5 connected to the conductive grid lines. A pair of total electrodes 5 are distributed on both sides of the corresponding perovskite solar cell module, and the total electrodes 5 are connected by connecting wires 6 between multiple perovskite solar cell modules to realize the series-parallel connection of the perovskite solar cell module. In this embodiment, the total electrode 5 is located outside the packaging space to prevent the setting of the total electrode from affecting the sealing of the surrounding encapsulation glue 4 and improve the water blocking effect. The total electrode 5 includes a total grid line distributed on both sides of the transparent conductive layer 3b and a lead-out terminal connected to the middle of the total grid line. The total grid line is connected to the conductive grid line for summarizing the electrons on the conductive grid line, and the lead-out terminal is used to connect to the connecting wire 6. The materials of the conductive grid line and the total grid line are metals, including at least one of gold, silver, copper, or aluminum. The conductive grid line has a width of 0.01~0.5mm and a thickness of 0.1~30μm. It is at least 10μm away from the edge of the perovskite solar cell module and 1~2mm away from the outer edge of the surrounding encapsulation glue 4. The total grid line width is 0.02~1mm, and the thickness is 0.1~30μm. The lead terminal width is 2~6mm, the length is 5~10mm, and the thickness is 0.1~30μm. The lead terminal is adjacent to the total grid line and is 5~12mm away from the edge of the perovskite solar cell module.

[0056] The matrix-arranged perovskite solar cell modules are connected to the lead-out terminals of adjacent perovskite solar cell modules through connecting wires 6 to realize the series-parallel connection of adjacent perovskite battery modules. Specifically, the positive and negative electrodes of a single battery module are respectively led out by connecting the lead-out terminals 5, and connected in series or in parallel with the positive and negative electrodes of adjacent perovskite solar cell modules. Moreover, a through hole 7 is provided on the bottom substrate 1, and the through hole 7 is located outside the packaging space, so there is no need to seal the through hole separately, and the connecting wire 6 leads out the total positive and negative electrodes of the components after series-parallel connection, and the connecting wire 6 passes through the back of the through hole 7 left on the bottom substrate and forms the connection end of the perovskite solar cell assembly, which is used to connect to a junction box or a load, etc. The connecting wire 6 is a metal wire, a conductive tape or a metal foil, and its width is 0.5~10mm. The bottom substrate 1 is ultra-white glass, tempered glass, a metal substrate or a fluorine-containing flexible substrate.

[0057] like Figure 1 or Figure 5As shown, the perovskite solar cell module includes a plurality of unit cells connected in series and parallel, and each unit cell includes a hole blocking layer 3c, an electron transport layer 3d located on the hole blocking layer 3c, a perovskite light absorbing layer 3e located on the electron transport layer 3d, a hole transport layer 3f located on the perovskite light absorbing layer 3e, and a counter electrode layer 3g located on the hole transport layer 3f, wherein the counter electrode layer 3g also covers one side of the unit cell. When the unit cells need to be connected in series, the unit cells can be arranged in the form of etching lines that separate adjacent unit cells on the transparent conductive layer 3b, and the counter electrode layer 3g on the side of the unit cell can be arranged across the etching lines, thereby achieving series connection. For parallel unit cells, the positive and negative electrode layers of adjacent unit cells are separated by etching lines to achieve parallel connection of multiple unit cells. The perovskite light absorbing layer material can be MAPbI3, FAPbI3, MA x FA (1-x) PbI3(0≤x≤1), CsPbI3, CsPbI x Br 3-x (0≤x≤3), CsPbBr3, Cs x (MA y FA 1-y ) (1-x) PbI Z Br 3-Z (0≤x≤1, 0≤y≤1, 0≤z≤3), (PEA)2(MA) n-1 Pb n X 3n+1 One or more mixed materials (X=I / Br, n≥1).

[0058] Specifically, when preparing a perovskite solar cell module, Figures 1 to 8 As shown, a plurality of perovskite solar cell modules are laid on a bottom substrate 1 of the component in a matrix arrangement, a filling layer 2 is filled between the perovskite solar cell module and the bottom substrate 1, a transparent substrate 3a with a transparent conductive layer 3b is covered on the perovskite solar cell module, and the periphery of the perovskite solar cell module is sealed with a surrounding encapsulation glue 4.

[0059] The packaging method of the above-mentioned perovskite solar cell module specifically comprises the following steps:

[0060] Step 1: stack the bottom substrate 1, the filling layer 2, the surrounding encapsulation glue 4, the matrix-arranged perovskite solar cell modules and the transparent substrate (the perovskite solar cell module and the transparent substrate are a whole) in order from bottom to top; the surrounding encapsulation glue is located around the single perovskite solar cell module and the filling layer 2; the perovskite solar cell modules are connected in series and parallel through connecting wires;

[0061] Step 2: After heating the laminator hot plate, the stacked perovskite solar cell components are placed into the laminator hot plate. The lamination process is divided into three stages: the first stage is the vacuuming stage, the second stage is the pressurizing stage, and the third stage is the lamination stage.

[0062] Step 3: After the three stages of lamination are completed, the packaged perovskite solar cell modules are removed and cooled.

[0063] The laminator hot plate temperature range is set to 50°C~180°C. In particular, different lamination temperatures are selected for different perovskite material systems. For materials with poor thermal stability that decompose at around 85°C, specifically MAPbI3, FAPbI3, MA x FA (1-x) For materials such as PbI3, the lamination temperature is preferably 80℃~110℃; for materials with good thermal stability that decompose at around 150℃, specifically CsPbI3, CsPbI x Br 3-x 、CsPbBr3、Cs x (MA y FA 1-y ) (1-x) PbI Z Br 3-Z 、(PEA)2(MA) n-1 Pb n I 3n+1 The lamination temperature of materials such as (X=I, Br) is preferably 110℃~160℃; the vacuuming time range is 2~10 min, the pressurizing time range is 5~15s, and the lamination time range is 5~30 min.

[0064] Furthermore, the vacuuming time is 3 to 6 minutes, the lamination time is 8 to 15 minutes, and the lamination pressure is 30 to 100 kPa.

[0065] Example 1

[0066] like Figures 1 to 3 As shown, this embodiment relates to a parallel perovskite solar cell assembly. The specific implementation steps include:

[0067] The perovskite solar cell modules arranged in 2 rows and 4 columns are laid on top of the tempered glass (bottom substrate 1). A transparent substrate 3a with a transparent conductive layer 3b formed on the lower surface is provided on the perovskite solar cell module. A single perovskite solar cell module includes from top to bottom: a hole blocking layer 3c, an electron transport layer 3d, a perovskite light absorption layer 3e, a hole transport layer 3f, and a counter electrode layer 3g; wherein, a total electrode 5 is provided on the transparent conductive layer 3b, which is used as the positive and negative lead-out terminals of a single perovskite solar cell module. A filling layer 2 is laid between a single perovskite solar cell module and the bottom substrate 1, and a surrounding encapsulation glue 4 is laid around a single perovskite solar cell module. The total electrode 5 is arranged outside the surrounding encapsulation glue 4. When each perovskite solar cell module is placed, the positive and negative directions are both negative on the left and positive on the right.

[0068] Use conductive copper tape (connecting wire 6) to connect the positive and negative electrodes of the perovskite solar cell module laid out above, and Figure 3 After the parallel connection, the positive and negative electrodes are respectively gathered at one end of the tempered glass, and the positive and negative electrode leads are respectively passed through the through holes 7 left on the tempered glass to the back of the tempered glass.

[0069] The arranged perovskite solar cell modules are placed in a laminator, and the temperature range of the laminator hot plate is set to 50℃~180℃. In particular, different lamination temperatures are selected for different perovskite material systems. x FA (1-x) For materials with poor thermal stability such as PbI3, the lamination temperature is preferably 80℃~110℃; for CsPbI3, CsPbI x Br 3-x 、CsPbBr3、Cs x (MA y FA 1-y ) (1-x) PbI Z Br 3-Z 、(PEA)2(MA) n-1 Pb n I 3n+1 (X=I, Br) and other materials with good thermal stability, the lamination temperature is preferably 110℃~160℃; the vacuuming time range is 2~10 min, the pressurizing time range is 5~15 s, and the lamination time range is 5~30 min. Preferably, the vacuuming time is 3~6 min, the lamination time is 8~15 min, and the lamination pressure is 30~100 kPa.

[0070] Example 2

[0071] like Figures 5 to 8As shown, this embodiment relates to a series perovskite solar cell module. The specific implementation steps include:

[0072] The first row of perovskite solar cell modules are placed with the positive and negative poles in the left side with the negative pole and the right side with the positive pole; the second row of perovskite solar cell modules are placed with the positive pole in the left side with the positive pole and the right side with the negative pole.

[0073] Use conductive copper tape (connecting wire 6) to connect the positive and negative electrodes of the perovskite solar cell module laid out above, and Figure 7 The perovskite solar cell arrays are connected in series in a manner; after the series connection, the positive and negative electrodes are respectively gathered at one end of the tempered glass, and the positive and negative electrode leads are respectively passed through the through holes 7 left on the tempered glass to the back of the tempered glass.

[0074] The remaining steps are the same as those in Example 1 and will not be described in detail here.

[0075] Example 3

[0076] The packaging of a MAPbI3 perovskite solar cell assembly, wherein the perovskite solar cell module comprises a plurality of unit cells, each unit cell comprises an FTO layer (transparent conductive layer 3b), a hole blocking layer 3c, an electron transport layer 3d, a MAPbI3 perovskite layer (perovskite light absorbing layer 3e), a hole transport layer 3f, and a carbon counter electrode layer (counter electrode layer 3g), wherein the MAPbI3 perovskite layer is arranged between the electron transport layer and the carbon counter electrode layer; the FTO layers of adjacent unit cells are separated by etching lines, and the counter electrode layer is connected to the FTO layers of adjacent unit cells across the etching lines, thereby realizing 8 unit cells connected in series.

[0077] The perovskite solar cell modules arranged in 2 rows and 2 columns are laid on top of the tempered glass (bottom substrate 1). A single perovskite solar cell module contains 8 unit cells connected in series, and the positive and negative electrodes are led out through the total electrode 5. A filling layer 2 is laid between the single perovskite solar cell module and the bottom substrate 1, and a surrounding encapsulation glue 4 is laid around the single perovskite solar cell module. The total electrode 5 is arranged outside the surrounding encapsulation glue 4. When each perovskite solar cell module is placed, the positive and negative directions are both negative on the left and positive on the right.

[0078] Use conductive copper tape (connecting wire 6) to connect the positive and negative electrodes of the perovskite solar cell module laid out above, and Figure 3 After the parallel connection, the positive and negative electrodes are respectively gathered at one end of the tempered glass, and the positive and negative electrode leads are respectively passed through the through holes 7 left on the tempered glass to the back of the tempered glass.

[0079] The connected but unpackaged perovskite cell assembly was tested for its JV curve and photoelectric conversion parameters under an LED light source, where the irradiance of the LED light source was 20,000 lux.

[0080] The perovskite solar cell modules were placed in a laminator, the temperature of the laminator was set at 95°C, vacuum was drawn for 5 minutes, pressurized for 10 seconds, and laminated for 10 minutes. The lamination pressure was 100 kPa. After the lamination was completed, the modules were taken out and tested for their JV curve and photoelectric conversion parameters under LED light source after cooling. The light intensity of the LED light source was 50 W / m 2 .

[0081] Table 1 shows the performance of perovskite solar cell modules before and after lamination packaging at 50W / m 2 Photoelectric conversion parameters measured under LED light source. Fig. 9 The curve diagram drawn by this parameter shows that the efficiency and total output power of the perovskite solar cell module are slightly improved before and after lamination and encapsulation.

[0082] Table 1 Perovskite solar cell modules before and after lamination and packaging under LED light source (50W / m 2 ) of the photoelectric conversion parameters

[0083]

[0084] Among them, Voc is the open circuit voltage, Jsc is the short circuit current, FF is the fill factor, Eff is the photoelectric conversion efficiency, and Pmax is the maximum power.

[0085] The perovskite battery module prepared by using the single substrate structure packaging in Examples 1-3 and the set lamination parameters has no impact on the performance of the module after packaging, but is improved. In addition, the battery structure is lightweight and has good resistance to moisture and oxygen.

Claims

1. A perovskite solar cell module, characterized in that: include: a bottom substrate; A plurality of series-parallel perovskite solar cell modules are arranged in a matrix on the bottom substrate; a filling layer disposed between the base substrate and each perovskite solar cell module; A surrounding encapsulation adhesive is disposed on the upper surface of the bottom substrate and is disposed along the edge of each perovskite solar cell module and its corresponding filling layer; as well as A plurality of transparent substrates, each transparent substrate corresponds to each perovskite solar cell module and is respectively covered on the corresponding perovskite solar cell module, and a transparent conductive layer is formed on the lower surface of each transparent substrate and is sealed with the surrounding encapsulation glue of the corresponding perovskite solar cell module, so that each perovskite solar cell module is independently sealed in a packaging space surrounded by the bottom substrate, the corresponding transparent substrate and the corresponding surrounding encapsulation glue.

2. The perovskite solar cell assembly according to claim 1, characterized in that: A gap of 2 mm to 5 mm is provided between the filling layer and the surrounding encapsulation glue, and a height difference between the bottom of the filling layer and the bottom of the surrounding encapsulation glue is 0.1 mm to 0.3 mm.

3. The perovskite solar cell module according to claim 1, characterized in that: It also includes conductive grid lines distributed on the lower surface of the transparent conductive layer; two main electrodes arranged on the transparent conductive layer and connected to the conductive grid lines; and connecting wires connected to the corresponding main electrodes of each perovskite solar cell module.

4. The perovskite solar cell assembly according to claim 3, characterized in that: A plurality of the perovskite solar cell modules are connected in series and in parallel via the connecting wires.

5. The perovskite solar cell assembly according to claim 3, characterized in that: The bottom substrate is also provided with a through hole for the connecting wire to pass through.

6. The perovskite solar cell module according to claim 1, characterized in that: The perovskite solar cell module comprises a hole blocking layer, an electron transport layer, a perovskite light absorbing layer, a hole transport layer and a counter electrode layer which are arranged in sequence from bottom to top.

7. A method for packaging a perovskite solar cell module according to any one of claims 1 to 6, characterized in that: include: Step 1: stacking the bottom substrate, the perovskite solar cell module, the surrounding encapsulation glue and the transparent substrate in order from bottom to top to obtain a stacked battery; Step 2: After heating the laminator heating plate, the stacked batteries are placed in the laminator heating plate, and the stacked batteries are vacuumed, pressurized and laminated by the laminator heating plate to obtain packaged batteries; Step 3: Take the packaged battery out from the laminator heating plate and cool it down.

8. The packaging method of a perovskite solar cell assembly according to claim 7, characterized in that: The perovskite solar cell module uses a material that decomposes at about 85°C, and the temperature of the laminator heating plate is set to 80°C to 110°C; Alternatively, the perovskite solar cell module uses a material that decomposes at about 150°C, and the temperature of the laminator heating plate is set to 110°C~160°C.

9. The packaging method of a perovskite solar cell assembly according to claim 7 or 8, characterized in that: The vacuuming time of the heating plate of the laminator is set to 3 min to 6 min; the laminating time of the heating plate of the laminator is set to 8 min to 15 min, and the pressure is set to 30 kPa to 100 kPa.

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