Solar cell module and solar cell

Abstract

The utility model provides a solar cell module and a solar cell. The solar cell module includes: a substrate; the at least one battery unit is positioned on one side of the substrate; and the reflecting structure is positioned on at least part of the peripheral side of the battery unit. The reflection structure is arranged on at least part of the peripheral side of the cell unit, light leakage can be prevented, light can be reflected into the cell unit, the light utilization rate of the solar cell module is improved, and therefore the photoelectric conversion efficiency of the solar cell module is improved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to solar cell modules and solar cells. Background Art

[0002] The development of semiconductor technology plays a crucial role in the progress of the electronics industry. As a new type of semiconductor, perovskite has many advantages such as long carrier diffusion length, high defect tolerance, adjustable bandgap, and large absorption coefficient. Compared with traditional organic and inorganic semiconductors, the perovskite preparation process is simple and the cost is relatively low, showing great advantages in the semiconductor field. The application of perovskite in the field of solar cells has great potential. So far, the efficiency of perovskite solar cells has exceeded 26%, and the T95 has exceeded thousands of hours. However, limited by related technologies, how to further improve the efficiency of perovskite solar cells has become a major problem. Summary of the Utility Model

[0003] In view of this, embodiments of this application provide a solar cell module and a solar cell.

[0004] The first aspect of this application provides a solar cell module, including:

[0005] A substrate;

[0006] At least one battery unit, located on one side of the substrate;

[0007] A reflection structure, located on at least part of the periphery of the battery unit.

[0008] In one embodiment, the reflection structure includes a support part and a reflection part arranged in a stacked manner, and the reflection part is located on the side of the support part close to or away from the battery unit;

[0009] Preferably, the material of the reflection part includes metal, ceramic or resin;

[0010] Preferably, the metal includes gold, silver or copper;

[0011] Preferably, the material of the support part includes glass or butyl rubber;

[0012] Preferably, the reflection structure surrounds the periphery of the battery unit.

[0013] In one embodiment, the battery unit includes a first electrode layer, a functional layer and a second electrode layer arranged in a stacked manner in sequence, and the first electrode layer is located on the side of the second electrode layer close to the substrate;

[0014] The solar cell module further includes:

[0015] A first light concentrating layer, located on the side of the substrate away from the first electrode layer; and / or, the first light concentrating layer is located between the substrate and the first electrode layer;

[0016] Preferably, the first light condensing layer includes a first light condensing structure;

[0017] Preferably, the first light condensing layer includes one or more first light condensing structures arranged side by side;

[0018] Preferably, the first light condensing structure includes a convex lens;

[0019] Preferably, the number of layers of the first light condensing layer is M layers, where M is an integer greater than or equal to 2;

[0020] Preferably, the first light condensing layer closest to the battery cell is the first layer of the first light condensing layer. Each layer of the first light condensing layer includes a plurality of first light condensing structures arranged at intervals and side by side. The orthographic projection of the first light condensing structure in the (i + 1)-th layer of the first light condensing layer on the substrate covers the orthographic projection of the interval between adjacent first light condensing structures in the i-th layer of the first light condensing layer on the substrate, where i is an integer less than or equal to M;

[0021] Preferably, the reflective structure covers at least part of the side wall of the first light condensing layer;

[0022] Preferably, the material of the convex lens includes glass, plastic, topaz or diamond.

[0023] In one embodiment, the first light condensing structure further includes a second light condensing layer located on the side of the first light condensing layer close to the battery cell; the refractive index of the second light condensing layer is greater than the refractive index of air;

[0024] Preferably, the refractive index of the second light condensing layer is 1.6 to 1.7;

[0025] Preferably, the material of the second light condensing layer includes photoresist;

[0026] Preferably, the first electrode layer includes a light-transmitting material, and / or the substrate includes a light-transmitting material.

[0027] In one embodiment, the battery cell includes a first electrode layer, a functional layer, and a second electrode layer stacked in sequence. The first electrode layer is located on the side of the second electrode layer close to the substrate;

[0028] The solar cell module further includes:

[0029] A third light condensing layer located on the side of the second electrode layer away from the substrate;

[0030] Preferably, the third light condensing layer includes a second light condensing structure;

[0031] Preferably, the third light condensing layer includes one or more second light condensing structures arranged side by side;

[0032] Preferably, the second light - condensing structure includes a convex lens; preferably, the number of layers of the third light - condensing layer is N layers, where N is an integer greater than or equal to 2;

[0033] Preferably, the third light - condensing layer closest to the battery unit is the first - layer third light - condensing layer. Each layer of the third light - condensing layer includes a plurality of second light - condensing structures arranged at intervals and side - by - side. The orthographic projection of the second light - condensing structure in the (j + 1)-th layer of the third light - condensing layer on the substrate covers the orthographic projection of the interval between adjacent second light - condensing structures in the j - th layer of the third light - condensing layer on the substrate, where j is an integer less than or equal to N;

[0034] Preferably, the reflective structure covers at least part of the side wall of the second light - condensing structure;

[0035] Preferably, the material of the convex lens includes glass, plastic, topaz or diamond;

[0036] Preferably, the second electrode layer includes a light - transmissive material.

[0037] In one embodiment, the second light - condensing structure further includes a fourth light - condensing layer, which is located on the side of the third light - condensing layer close to the battery unit; the refractive index of the fourth light - condensing layer is greater than the refractive index of air;

[0038] Preferably, the refractive index of the fourth light - condensing layer is 1.6 - 1.7;

[0039] Preferably, the material of the fourth light - condensing layer includes photoresist.

[0040] The second aspect of the present application provides a solar cell module, including:

[0041] A substrate;

[0042] A first electrode layer, located on one side of the substrate;

[0043] A functional layer, located on the side of the first electrode layer away from the substrate;

[0044] A second electrode layer, located on the side of the functional layer away from the substrate. The first electrode layer, the functional layer and the second electrode layer form at least one battery unit;

[0045] A first light - condensing layer, located on the side of the substrate away from the first electrode layer, and / or located between the substrate and the first electrode layer;

[0046] A third light - condensing layer, located on the side of the second electrode layer away from the substrate;

[0047] Wherein, a second light - condensing layer is provided on the side of the first light - condensing layer close to the battery unit, and the refractive index of the second light - condensing layer is greater than the refractive index of air; and / or, a fourth light - condensing layer is provided on the side of the third light - condensing layer close to the battery unit, and the refractive index of the fourth light - condensing layer is greater than the refractive index of air.

[0048] In one embodiment, the first light condensing layer includes a first light condensing structure;

[0049] Preferably, the first light condensing layer includes one or more first light condensing structures arranged side by side;

[0050] Preferably, the first light condensing structure includes a convex lens;

[0051] Preferably, the number of layers of the first light condensing layer is M layers, where M is an integer greater than or equal to 2;

[0052] Preferably, the first light condensing layer closest to the battery cell is the first layer of the first light condensing layer. Each layer of the first light condensing layer includes a plurality of first light condensing structures arranged at intervals and side by side. The orthographic projection of the first light condensing structure in the (i + 1)-th layer of the first light condensing layer on the substrate covers the orthographic projection of the interval between adjacent first light condensing structures in the i-th layer of the first light condensing layer on the substrate, where i is an integer less than or equal to M;

[0053] Preferably, the reflective structure covers at least part of the side wall of the first light condensing layer;

[0054] Preferably, the material of the convex lens includes glass, plastic, topaz or diamond;

[0055] Preferably, the refractive index of the second light condensing layer is 1.6 to 1.7;

[0056] Preferably, the material of the second light condensing layer includes photoresist.

[0057] In one embodiment, the third light condensing layer includes a second light condensing structure;

[0058] Preferably, the third light condensing layer includes one or more second light condensing structures arranged side by side;

[0059] Preferably, the second light condensing structure includes a convex lens; preferably, the number of layers of the third light condensing layer is N layers, where N is an integer greater than or equal to 2;

[0060] Preferably, the third light condensing layer closest to the battery cell is the first layer of the third light condensing layer. Each layer of the third light condensing layer includes a plurality of second light condensing structures arranged at intervals and side by side. The orthographic projection of the second light condensing structure in the (j + 1)-th layer of the third light condensing layer on the substrate covers the orthographic projection of the interval between adjacent second light condensing structures in the j-th layer of the third light condensing layer on the substrate, where j is an integer less than or equal to N;

[0061] Preferably, the reflective structure covers at least part of the side wall of the second light condensing structure;

[0062] Preferably, the material of the convex lens includes glass, plastic, topaz or diamond;

[0063] Preferably, the refractive index of the fourth light condensing layer is 1.6 to 1.7;

[0064] Preferably, the material of the fourth condenser layer includes photoresist.

[0065] The third aspect of the present application provides a solar cell, including the above-mentioned solar cell module.

[0066] In one embodiment, the solar cell module includes:

[0067] A substrate;

[0068] A plurality of battery units, located on one side of the substrate;

[0069] A reflection structure, the orthographic projection of the reflection structure on the substrate surrounds the orthographic projection of the plurality of battery units on the substrate.

[0070] In the solar cell module of the embodiment of the present application, a reflection structure is provided on at least part of the peripheral side of the battery unit, which can prevent light leakage and reflect light into the battery unit, improving the light utilization rate of the solar cell module, thereby improving the photoelectric conversion efficiency (Power Conversion Efficiency, abbreviated as PCE) of the solar cell module. Description of the Drawings

[0071] Figure 1 It is a schematic top view structure diagram of a solar cell module in an embodiment of the present application.

[0072] Figure 2 is Figure 1 The schematic cross-sectional structure diagram of the solar cell module in the AA' direction.

[0073] Figure 3 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application.

[0074] Figure 4 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application.

[0075] Figure 5 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application.

[0076] Figure 6 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application.

[0077] Figure 7 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application.

[0078] Figure 8 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application.

[0079] Figure 9 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application.

[0080] Figure 10 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application.

[0081] Figure 11 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application.

[0082] Figure 12 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application.

[0083] Figure 13 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application.

[0084] Figure 14 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application.

[0085] Figure 15 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application.

[0086] Figure 16 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application.

[0087] Figure 17 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application.

[0088] Figure 18 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application.

[0089] Figure 19 It is a schematic cross-sectional structure diagram of a solar cell module in another embodiment of the present application. Detailed implementation manners

[0090] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0091] In addition, to better illustrate the present application, numerous specific details are given in the following detailed implementation manners. Those skilled in the art should understand that the present application can also be implemented without certain specific details. In some instances, methods and means well-known to those skilled in the art are not described in detail in order to highlight the gist of the present application.

[0092] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0093] In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0094] In the first aspect of the present application, a solar cell module is provided. Referring to Figure 1 and Figure 2 the structural schematic diagrams of the solar cell module shown, the solar cell module includes: a substrate 100; at least one battery unit 200 located on one side of the substrate 100; and a reflection structure 300 located on at least part of the periphery of the battery unit 200.

[0095] It should be noted that the reflection structure 300 can reflect the light incident on the reflection structure.

[0096] In the solar cell module of the embodiment of the present application, by providing the reflection structure 300 on at least part of the periphery of the battery unit 200, light leakage can be prevented, and the light can also be reflected into the battery unit 200, improving the light utilization rate of the solar cell module, thereby improving the photoelectric conversion efficiency of the solar cell module.

[0097] In one embodiment, referring to Figure 3 and Figure 4 the structural schematic diagrams of the solar cell module shown, the reflection structure 300 includes a support part 310 and a reflection part 320 which are stacked, and the reflection part 320 is located on the side of the support part 310 close to or away from the battery unit 200. Thus, the reflection structure 300 is more stable, which is beneficial to improving the stability of the solar cell module.

[0098] In one embodiment, the material of the reflection part 320 includes metal, ceramic or resin; the metal includes gold, silver or copper. In one embodiment, the material of the support part 310 includes glass or butyl rubber. Thus, the material sources are extensive, the effect of reflecting light is better, and the support effect of the support part 310 is better. It can also play a certain encapsulation effect, improving the stability of the solar cell module. Exemplarily, the support part 310 is glass and the reflection part 320 is silver. The silver is coated on the surface of the glass, and the silver is located on the side of the glass away from the battery unit 200. The silver hardly electrically connects with the first electrode layer and the second electrode layer to cause a short circuit.

[0099] Exemplarily, the solar cell module may further include a silica encapsulation layer, which is located on the side of the battery unit 200 away from the substrate 100, and the silica encapsulation layer extends towards the substrate 100 and is hermetically connected to the substrate 100; when the reflection part 320 is metal, the silica encapsulation layer can isolate the battery unit 200 and the reflection part 320, and at the same time, it can also play an excellent encapsulation effect, preventing water vapor from invading the battery unit 200. Exemplarily, the support part 310 is glass and the reflection part 320 is silver. The silver is coated on the surface of the glass close to the battery unit 200. Thus, the light is directly reflected by the silver layer, and the reflection effect is better.

[0100] In one embodiment, referring to Figure 1 , the reflection structure 300 surrounds the circumferential side of the battery unit 200. Thus, the effect of the reflection structure 300 reflecting light is better.

[0101] Exemplarily, when the number of battery units 200 is one, the reflection structure 300 surrounds the circumferential side of the battery unit; when the number of battery units 200 is multiple, the reflection structure 300 is located on the circumferential side of the overall structure composed of multiple battery units.

[0102] In one embodiment, referring to Figure 5 the structural schematic diagram of the solar cell module shown, the battery unit 200 includes a first electrode layer 210, a functional layer 220 and a second electrode layer 230 which are stacked in sequence. The first electrode layer 210 is located on the side of the second electrode layer 230 close to the substrate 100; the solar cell module further includes: a first light concentrating layer 400, which is located on the side of the substrate 100 away from the first electrode layer 210. At this time, the first electrode layer 210 is transparent and the substrate 100 is transparent, and the solar cell module can realize light incident from one side. Thus, the first light concentrating layer 400 can concentrate more light and make it incident into the battery unit, improving the utilization rate of light by the solar cell module, and further improving the PCE efficiency of the solar cell module.

[0103] In another embodiment, referring to Figure 6Schematic structural diagram of the solar cell module shown. The first light concentrating layer 400 is located between the substrate 100 and the first electrode layer 210. At this time, the first electrode layer 210 is transparent and the substrate 100 is transparent. Thus, the first light concentrating layer 400 can concentrate more light passing through the substrate 100 and incident it into the battery unit 200, improving the utilization rate of light by the solar cell module, and further improving the PCE efficiency of the solar cell module.

[0104] In one embodiment, referring to Figure 5 , Figure 6 and Figure 7 Schematic structural diagram of the solar cell module shown, the first light concentrating layer 400 includes a first light concentrating structure 410. The number of the first light concentrating structures 410 can be one (refer to Figure 7 ), or can be multiple (refer to Figure 5 and Figure 6 ). In a preferred embodiment, the number of the first light concentrating structures is multiple. Thus, the size of the first light concentrating structure 410 is small and the thickness is thin, which is beneficial to reducing the overall size of the solar cell module, saving raw materials, and the distribution mode of the multiple light concentrating structures can be selected more flexibly.

[0105] In one embodiment, referring to Figures 5 to 7 Schematic structural diagram of the solar cell module shown, the first light concentrating structure 410 includes a convex lens. Exemplarily, the structure of the convex lens includes at least one of double convex, plano-convex and concave-convex. As long as it can achieve the effect of converging light, the structure of the convex lens can be selected flexibly. Figures 5 to 7 The convex lens shown in Figure 12 is a double convex lens. Exemplarily, referring to Figure 12 , the first light concentrating structure 410 in the first light concentrating layer 400 converges the light with a wider external incident angle and incident it into the battery unit 200 along the direction perpendicular to the substrate 100 (refer to the optical path S1), improving the utilization rate of light by the solar cell module; or, the first light concentrating structure 410 in the first light concentrating layer 400 converges the light with a wider external incident angle and incident it into the battery unit 200 along a direction having a certain angle (greater than 0° and less than 180°) with the direction perpendicular to the substrate 100. At this time, when the light is incident on the surface of the reflection part 320 in the reflection structure 300, the light will be reflected into the battery unit 200 (refer to the optical path S2), thereby improving the utilization rate of light by the solar cell module.

[0106] It can be understood that when the convex lens is a plano-convex or concave-convex structure, the convex part faces away from the side of the battery unit.

[0107] In one embodiment, referring to Figure 8, the number of layers of the first light condensing layer 400 is M layers, where M is an integer greater than or equal to 2. The first light condensing layer 400 has a better effect of condensing light. It can be understood that multiple layers of the first light condensing layer 400 can be bonded together with glue, or the gaps between multiple layers of the first light condensing layer 400 can be filled with an organic material and fixed together after curing.

[0108] Exemplarily, referring to Figure 8 , the first light condensing layer 400 closest to the battery unit 200 is the first layer of the first light condensing layer. Each layer of the first light condensing layer 400 includes a plurality of first light condensing structures 410 arranged at intervals and side by side. The orthographic projection of the first light condensing structure 410 in the (i + 1)-th layer of the first light condensing layer 400 on the substrate 100 covers the orthographic projection of the interval between adjacent first light condensing structures 410 in the i-th layer of the first light condensing layer 400 on the substrate 100, where i is an integer less than or equal to M. Thus, it is beneficial to improve the effect of condensing light.

[0109] In one embodiment, the material of the convex lens includes glass, plastic, topaz or diamond. Thus, the material source is wide and the effect of condensing light is better.

[0110] In one embodiment, referring to Figures 5 to 8 the structural schematic diagram of the solar cell module shown, the solar cell module further includes a second light condensing layer 420, which is located on the side of the first light condensing layer 400 close to the battery unit 200. Thus, when there are gaps in the first light condensing layer 400, light can be condensed in the second light condensing layer 420, further increasing the probability of light incident on the battery unit 200 and improving the utilization rate of light by the solar cell module.

[0111] It can be understood that the first light condensing layer 400 can be bonded to the surface of the second light condensing layer 420 far from the battery unit 200 with glue, or can be embedded in the surface of the second light condensing layer 420 far from the battery unit.

[0112] It can be understood that referring to Figure 6 and Figure 9 , when the first light condensing layer 400 is located between the substrate 100 and the battery unit 200, the second light condensing layer 420 is located on the side of the first light condensing layer 400 close to the battery unit 200. The first light condensing layer 400 can be completely embedded in the second light condensing layer 420 (refer to Figure 9 ), or can be partially embedded in the second light condensing layer 420 (refer to Figure 6 ). This is beneficial to maintaining the flatness of the first light condensing layer 400 and the second light condensing layer 420, and is beneficial to the subsequent production of film layers.

[0113] In one embodiment, the refractive index of the second light condensing layer 420 is 1.6 to 1.7, and for example, it can be 1.6, 1.63, 1.65, 1.68, or 1.7, etc. Thus, the refractive index of the second light condensing layer 420 is relatively high, and the effect of converging light is better.

[0114] In one embodiment, the material of the second light condensing layer 420 includes photoresist. Thus, the material source is wide and the price is low.

[0115] In one embodiment, referring to Figure 10 the schematic structural diagram of the solar cell module shown, the battery unit includes a first electrode layer 210, a functional layer 220, and a second electrode layer 230 which are sequentially stacked, and the first electrode layer 210 is located on the side of the second electrode layer 230 close to the substrate 100; the solar cell module further includes: a third light condensing layer 500, which is located on the side of the second electrode layer 230 away from the substrate 100. At this time, the second electrode layer 230 is transparent. Thus, the third light condensing layer 500 can gather more light and incident it into the battery unit 200, improving the utilization rate of light by the solar cell module, and further improving the PCE efficiency of the solar cell module; and it is also beneficial to obtain a solar cell module with double-sided light incidence and a semi-transparent solar cell module.

[0116] In one embodiment, referring to Figures 10 to 12 , the third light condensing layer 500 includes a second light condensing structure 510. Exemplarily, the second light condensing structure 510 includes a convex lens, and the structure of the convex lens includes at least one of biconvex, plano-convex, and concave-convex. As long as it can achieve the effect of converging light, the structure of the convex lens can be flexibly selected. Figure 10 The convex lens shown in Figure 12 is a biconvex lens. Exemplarily, referring to

[0117] the second light condensing structure 510 in the third light condensing layer 500 converges the light with a relatively wide incident angle from the outside and incident it into the battery unit 200 along the direction perpendicular to the substrate 100 (refer to the optical path S3), improving the utilization rate of light by the solar cell module; or, the second light condensing structure 510 in the third light condensing layer 500 converges the light with a relatively wide incident angle from the outside and incident it into the battery unit 200 along a direction having a certain angle (greater than 0° and less than 180°) with the direction perpendicular to the substrate 100. At this time, when the light is incident on the surface of the reflection part 320 in the reflection structure 300, the light will be reflected into the battery unit 200 (refer to the optical path S4), thereby improving the utilization rate of light by the solar cell module.

[0118] In one embodiment, referring to Figure 11, the number of layers of the third light - condensing layer 500 is N layers, where N is an integer greater than or equal to 2. The third light - condensing layer 500 has a better effect of condensing light. It can be understood that multiple layers of the third light - condensing layer 500 can be bonded together by glue, and can also be fixed together by filling the gaps between multiple layers of the third light - condensing layer 500 with an organic material and then curing. Exemplarily, N layers of the third light - condensing layer 500 are stacked.

[0119] Exemplarily, referring to Figure 11 , the third light - condensing layer 500 closest to the battery cell 200 is the first - layer third light - condensing layer. Each layer of the third light - condensing layer 500 includes a plurality of second light - condensing structures 510 arranged at intervals and side - by - side. The orthographic projection of the second light - condensing structure 510 in the (j + 1)-th layer of the third light - condensing layer 500 on the substrate 100 covers the orthographic projection of the interval between adjacent second light - condensing structures 510 in the j - th layer of the third light - condensing layer on the substrate 100, where j is an integer less than or equal to N.

[0120] It can be understood that multiple layers of the third light - condensing layer 500 can be bonded together by glue, and can also be fixed together by filling the gaps between multiple layers of the third light - condensing layer 500 with an organic material and then curing.

[0121] In one embodiment, the material of the convex lens includes glass, plastic, topaz or diamond. Thus, the material source is wide and the effect of condensing light is better.

[0122] In one embodiment, referring to Figure 10 and Figure 11 shown in the schematic structural diagram of the solar cell module, the solar cell module further includes a fourth light - condensing layer 520, which is located on the side of the third light - condensing layer 500 close to the battery cell 200. Thus, when there are gaps in the third light - condensing layer 500, light can be condensed in the fourth light - condensing layer (the optical path S5 in Figure 12 can be referred to), further increasing the probability of light entering the battery cell 200 and improving the utilization rate of light by the solar cell module.

[0123] In one embodiment, the refractive index of the fourth light - condensing layer 520 is 1.6 - 1.7, for example, it can be 1.6, 1.63, 1.65, 1.68 or 1.7, etc. Thus, the refractive index of the fourth light - condensing layer 520 is relatively high and the effect of condensing light is better.

[0124] In one embodiment, the material of the fourth light - condensing layer 520 includes photoresist. Thus, the material source is wide and the price is low.

[0125] In one embodiment, referring to Figure 12Schematic structural diagram of the solar cell module shown, the reflection structure 300 covers at least part of the side walls of the first light concentration layer 400, and the reflection structure 300 covers at least part of the side walls of the third light concentration layer 500. Refer to Figure 9 and Figure 10 , the reflection structure 300 covers at least part of the side walls of the first light concentration layer 400 (refer to Figure 9 ) or the reflection structure 300 covers at least part of the side walls of the third light concentration layer 500 (refer to Figure 10 ).

[0126] Exemplarily, refer to Figure 12 , the reflection structure 300 covers the side walls of the first light concentration layer 400 and the side walls of the third light concentration layer 500. The reflection structure 300 can reflect the light leaking from the side walls of the first light concentration layer 400 and the third light concentration layer 500 to the battery unit (refer to the optical paths S2 and S4), improving the utilization rate of light by the solar cell module, or reflect the light leaking from the side walls of the first light concentration layer 400 and the third light concentration layer 500 to the first light concentration layer 400 and the third light concentration layer 500, and then the reflected light is converged and incident on the battery unit 200, improving the utilization rate of light by the solar cell module.

[0127] It can be understood that the first light concentration layer 400 can converge the light with a larger incident angle, the third light concentration layer 500 can converge the light with a larger incident angle, the light incident on the first light concentration layer 400 and the third light concentration layer 500 is converged and incident on the battery unit, reducing light loss and increasing light utilization rate, so that the solar cell device receives more and stronger light; the reflection structure 300 can prevent light leakage and improve light utilization rate, thereby improving the battery conversion efficiency of the solar cell module.

[0128] Exemplarily, refer to Figure 13 the schematic structural diagram of the solar cell module shown, the solar cell module further includes an encapsulation layer 600 and a cover plate 700, the encapsulation layer 600 is located on the side of the battery unit 200 away from the substrate 100, the cover plate 700 is located on the side of the encapsulation layer 600 away from the substrate 100, the third light concentration layer 500 can be located on the side of the cover plate 700 away from the substrate 100, at this time, the cover plate 700 and the encapsulation layer 600 are transparent. Exemplarily, refer to Figure 13 , the reflection structure 300 is located on the peripheral sides of the cover plate 700 and the substrate 100, and is hermetically connected to the first light concentration layer 400 and the third light concentration layer 500, and the encapsulation layer 600 extends towards the substrate 100 and is hermetically connected to the substrate 100.

[0129] It can be understood that the number of battery units 200 can be 1, 2, 3, 4, etc., Figure 1 , Figure 14 and Figure 15The cases where the number of battery cells 200 is 1, 2, and 4 are respectively shown. For the number of the remaining battery cells, reference can be made to Figure 14 and Figure 15 , and details will not be elaborated here. When there are at least two battery cells 200, the battery cells 200 can be connected in series (specific reference can be made to Figure 15 ), or can be connected in parallel (specific reference can be made to Figure 16 ).

[0130] In one embodiment, the functional layer 220 includes a first transport layer 221, a photoactive layer 222, and a second transport layer 223 which are stacked. The first transport layer 221 is located on the side of the photoactive layer 222 close to the substrate 100. One of the first transport layer 221 and the second transport layer 223 is an electron transport layer, and the other is a hole transport layer. The photoactive layer includes perovskite. The first transport layer, the second transport layer, and the photoactive layer are conventional materials, and details will not be elaborated here.

[0131] The second aspect of the present application provides a solar cell module. Referring to the structural schematic diagrams of the solar cell module shown in Figure 17 , Figure 18 and Figure 19 , the solar cell module includes: a substrate 100; a first electrode layer 210 located on one side of the substrate 100; a functional layer 220 located on the side of the first electrode layer 210 away from the substrate 100; a second electrode layer 230 located on the side of the functional layer 220 away from the substrate 100. The first electrode layer 210, the functional layer 220, and the second electrode layer 230 form at least one battery cell; a first condensing layer 400 located on the side of the substrate 100 away from the first electrode layer 210; and / or, the first condensing layer 400 is located between the substrate 100 and the first electrode layer 210; a third condensing layer 500 located on the side of the second electrode layer 230 away from the substrate 100; a second condensing layer 420 is provided on the side of the first condensing layer 400 close to the battery cell 200, and the refractive index of the second condensing layer 420 is greater than the refractive index of air; and / or, a fourth condensing layer 520 is provided on the side of the third condensing layer 500 close to the battery cell 200, and the refractive index of the fourth condensing layer 520 is greater than the refractive index of air. Among them, only the case containing only the second condensing layer is shown in the present application. For the remaining cases, reference can be made to Figures 17 to 19 .

[0132] It should be noted that the first condensing layer, the second condensing layer, the third condensing layer, and the fourth condensing layer are consistent with the previous description, and the solar cell module in this embodiment can be integrally or partially combined with the previously described solar cell module, and details will not be elaborated here.

[0133] It should be noted that the first electrode layer, the substrate, and the second electrode layer are transparent.

[0134] In one embodiment, the first light - condensing layer 400 includes a first light - condensing structure 410. The number of the first light - condensing structures 410 can be one or multiple. In a preferred embodiment, the number of the first light - condensing structures 410 is multiple. Thus, the size of the first light - condensing structures 410 is small and the thickness is thin, which is beneficial to reducing the overall size of the solar cell module, saving raw materials, and the distribution mode of the multiple first light - condensing structures 410 can be selected more flexibly.

[0135] In one embodiment, the first light - condensing structure 410 includes a convex lens. Exemplarily, the structure of the convex lens includes at least one of biconvex, plano - convex and concave - convex. As long as it can achieve the effect of converging light, the structure of the convex lens can be flexibly selected. Exemplarily, the first light - condensing structures 410 in the first light - condensing layer 400 converge the light with a wider incident - angle from the outside and make it incident on the battery unit 200 along the direction perpendicular to the substrate 100, improving the light utilization rate of the solar cell module; or, the first light - condensing structures 410 in the first light - condensing layer 400 converge the light with a wider incident - angle from the outside and make it incident on the battery unit 200 along a direction with a certain angle (greater than 0° and less than 180°) perpendicular to the substrate 100. At this time, when the light is incident on the surface of the reflection part 320 in the reflection structure 300, the light will be reflected into the battery unit 200, thereby improving the light utilization rate of the solar cell module.

[0136] In one embodiment, the number of layers of the first light - condensing layer 400 is M layers, where M is an integer greater than or equal to 2. The first light - condensing layer 400 has a better effect of converging light. It can be understood that the multiple first light - condensing layers 400 can be bonded together by glue, or the gaps between the multiple first light - condensing layers 400 can be filled with an organic material and fixed together after curing.

[0137] Exemplarily, the first light - condensing layer 400 closest to the battery unit is the first - layer first light - condensing layer 400. Each first light - condensing layer 400 includes a plurality of first light - condensing structures 410 arranged at intervals and side - by - side. The orthographic projection of the first light - condensing structures 410 in the (i + 1) - th layer first light - condensing layer 400 on the substrate 100 covers the orthographic projection of the intervals between adjacent first light - condensing structures 410 in the i - th layer first light - condensing layer 400 on the substrate 100, where i is an integer less than or equal to M. Thus, it is beneficial to improving the effect of converging light.

[0138] In one embodiment, the material of the convex lens includes glass, plastic, topaz or diamond. Thus, the material source is wide and the effect of converging light is better.

[0139] In one embodiment, the refractive index of the second light condensing layer 420 is 1.6 - 1.7, and for example, it can be 1.6, 1.63, 1.65, 1.68, 1.7, etc. Thus, the refractive index of the second light condensing layer 420 is relatively high, and the effect of converging light is better.

[0140] In one embodiment, the material of the second light condensing layer 420 includes photoresist. Thus, the material source is wide and the price is low.

[0141] In one embodiment, the third light condensing layer 500 includes a second light condensing structure 510. Exemplarily, the second light condensing structure 510 includes a convex lens, and the structure of the convex lens includes at least one of double convex, plano-convex, and concave-convex. As long as it can achieve the effect of converging light, the structure of the convex lens can be flexibly selected. Exemplarily, the second light condensing structure 510 in the third light condensing layer 500 converges the light with a wider incident angle from the outside and makes it incident on the battery unit 200 in a direction perpendicular to the substrate 100, improving the utilization rate of light by the solar cell module; or, the second light condensing structure 510 in the third light condensing layer 500 converges the light with a wider incident angle from the outside and makes it incident on the battery unit 200 in a direction having a certain included angle (greater than 0° and less than 180°) with the direction perpendicular to the substrate 100. At this time, when the light is incident on the surface of the reflection part 320 in the reflection structure 300, the light will be reflected into the battery unit 200, thereby improving the utilization rate of light by the solar cell module.

[0142] It can be understood that when the convex lens is a plano-convex or concave-convex structure, the protruding part faces away from the side of the battery unit.

[0143] In one embodiment, the number of layers of the third light condensing layer 500 is N layers, and N is an integer greater than or equal to 2. The effect of the third light condensing layer 500 in converging light is better. It can be understood that multiple layers of the third light condensing layer 500 can be bonded together with glue, and the gaps between multiple layers of the third light condensing layer 500 can also be filled with an organic material and fixed together after curing. Exemplarily, N layers of the third light condensing layer 500 are stacked.

[0144] Exemplarily, the third light condensing layer 500 closest to the battery unit 200 is the first layer of the third light condensing layer 500. Each layer of the third light condensing layer 500 includes a plurality of second light condensing structures 510 arranged at intervals and side by side. The orthographic projection of the second light condensing structure 510 in the (j + 1)-th layer of the third light condensing layer 500 on the substrate 100 covers the orthographic projection of the interval between adjacent second light condensing structures 510 in the j-th layer of the third light condensing layer 500 on the substrate 100, where j is an integer less than or equal to N.

[0145] In one embodiment, the material of the convex lens includes glass, plastic, topaz, or diamond. Thus, the material source is wide and the effect of converging light is better.

[0146] In one embodiment, the refractive index of the fourth condenser layer 520 is 1.6 to 1.7. For example, it can be 1.6, 1.63, 1.65, 1.68, or 1.7, etc. Thus, the refractive index of the fourth condenser layer 520 is relatively high, and the effect of converging light is better.

[0147] In one embodiment, the material of the fourth condenser layer 520 includes photoresist. Thus, the material source is wide and the price is low.

[0148] The third aspect of the present application provides a solar cell, including the above-mentioned solar cell module.

[0149] It should be noted that in addition to including the above-mentioned solar cell module, the solar cell may further include structures that a conventional solar cell should have, such as a housing, etc., which will not be elaborated here too much.

[0150] It should be noted that the solar cell module is consistent with the previous description and will not be elaborated here too much.

[0151] It can be understood that the solar cell module may include one battery unit or multiple battery units. When the number of battery units is one, the reflection structure surrounds the circumferential side of the battery unit; when the number of battery units is multiple, the reflection structure is located on the circumferential side of the overall structure composed of multiple battery units.

[0152] In one embodiment, the solar cell module includes: a substrate; multiple battery units located on one side of the substrate; a reflection structure, and the orthographic projection of the reflection structure on the substrate surrounds the orthographic projection of the multiple battery units on the substrate. Thus, the reflection structure covers the circumferential side of the overall structure composed of multiple battery units, and the effect of reflecting light is excellent.

[0153] The basic principles of the present application have been described above in combination with specific embodiments. However, it should be noted that the advantages, advantages, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, advantages, effects, etc. are essential for each embodiment of the present application. In addition, the above-disclosed specific details are only for the purpose of illustration and easy understanding, rather than limitations, and the above details do not limit the present application to necessarily adopt the above specific details to implement.

[0154] The above description has been given for purposes of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof.

Claims

1. A solar cell module, characterized in that, Comprising: A substrate; At least one battery cell, located on one side of the substrate; A reflection structure, located on at least a part of the peripheral side of the battery cell.

2. The solar cell module according to claim 1, wherein, The reflection structure includes a support part and a reflection part arranged in a stacked manner, and the reflection part is located on one side of the support part close to or away from the battery cell; And / or, the reflection structure surrounds the peripheral side of the battery cell.

3. The solar cell module according to claim 2, characterized in that, The material of the reflection part is metal, ceramic or resin; And / or, the material of the support part is glass or butyl rubber.

4. The solar cell module according to claim 3, wherein The metal is gold, silver or copper.

5. The solar cell module according to claim 1, wherein, The battery cell includes a first electrode layer, a functional layer and a second electrode layer arranged in a stacked manner in sequence, and the first electrode layer is located on the side of the second electrode layer close to the substrate; The solar cell module further includes: A first light-concentrating layer, located on the side of the substrate away from the first electrode layer; and / or, the first light-concentrating layer is located between the substrate and the first electrode layer.

6. The solar cell module according to claim 5, characterized in that, The first light-concentrating layer includes a first light-concentrating structure; And / or, the reflection structure covers at least a part of the side wall of the first light-concentrating layer.

7. The solar cell module according to claim 6, wherein The first light-concentrating layer includes one or more first light-concentrating structures arranged side by side; And / or, the first light-concentrating structure includes a convex lens; And / or, the number of layers of the first light-concentrating layer is M layers, and M is an integer greater than or equal to 2.

8. The solar cell module according to claim 7, characterized in that, The first light-concentrating layer closest to the battery cell is the first layer of the first light-concentrating layer. Each layer of the first light-concentrating layer includes a plurality of first light-concentrating structures arranged at intervals and side by side. The orthographic projection of the first light-concentrating structure in the (i + 1)-th layer of the first light-concentrating layer on the substrate covers the orthographic projection of the interval between adjacent first light-concentrating structures in the i-th layer of the first light-concentrating layer on the substrate, and i is an integer less than or equal to M.

9. The solar cell module according to claim 5, characterized in that, It further includes a second light-concentrating layer, located on the side of the first light-concentrating layer close to the battery cell; the refractive index of the second light-concentrating layer is greater than the refractive index of air.

10. The solar cell module according to claim 9, characterized in that, The refractive index of the second light-concentrating layer is 1.6 - 1.7; And / or, the material of the second light-concentrating layer is photoresist; And / or, the first electrode layer includes a light-transmitting material; And / or, the substrate includes a light-transmitting material.

11. The solar cell module according to any one of claims 1 to 10, characterized in that, The battery cell includes a first electrode layer, a functional layer and a second electrode layer arranged in a stacked manner in sequence, and the first electrode layer is located on the side of the second electrode layer close to the substrate; The solar cell module further includes: A third light-concentrating layer, located on the side of the second electrode layer away from the substrate.

12. The solar cell module according to claim 11, characterized in that, The reflection structure covers at least a part of the side wall of the third light-concentrating layer; And / or, the third light-concentrating layer includes a second light-concentrating structure.

13. The solar cell module according to claim 12, characterized in that The third light-concentrating layer includes one or more second light-concentrating structures arranged side by side; And / or, the second light-concentrating structure includes a convex lens; And / or, the number of layers of the third light-concentrating layer is N layers, and N is an integer greater than or equal to 2.

14. The solar cell module according to claim 13, wherein The third light-concentrating layer closest to the battery cell is the first-layer third light-concentrating layer. Each third light-concentrating layer includes a plurality of second light-concentrating structures arranged at intervals and side by side. The orthographic projection of the second light-concentrating structure in the (j + 1)-th layer third light-concentrating layer on the substrate covers the orthographic projection of the interval between adjacent second light-concentrating structures in the j-th layer third light-concentrating layer on the substrate, where j is an integer less than or equal to N; And / or, the second electrode layer includes a light-transmitting material.

15. The solar cell module according to claim 11, wherein It further includes a fourth light-concentrating layer, located on the side of the third light-concentrating layer close to the battery cell; the refractive index of the fourth light-concentrating layer is greater than the refractive index of air.

16. The solar cell module according to claim 15, characterized in that, The refractive index of the fourth light-concentrating layer is 1.6 to 1.7; And / or, the material of the fourth light-concentrating layer is a photoresist.

17. A solar cell, characterized in that, It includes the solar cell module according to any one of claims 1 to 16.

18. The solar cell according to claim 17, characterized in that, The solar cell module includes: A substrate; A plurality of battery cells, located on one side of the substrate; A reflection structure, the orthographic projection of the reflection structure on the substrate surrounds the orthographic projection of the plurality of battery cells on the substrate.

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