Solar cell module

Abstract

The utility model provides a kind of solar cell module, it includes cell layer and light-transmitting cover plate.Light-transmitting cover plate is oppositely arranged with cell layer.Light-transmitting cover plate has first surface and multiple microstructures.First surface is towards cell layer, and microstructure is located first surface and is arranged in array.Each microstructure has width on first surface, and each microstructure has height relative to first surface, the ratio of height and width is greater than or equal to 0.4 and less than or equal to 4, and each microstructure has light guide surface respectively, light guide surface is connected first surface, and light guide surface and first surface have an included angle between, included angle is greater than or equal to 45 degrees and less than or equal to 75 degrees.The solar cell module proposed in the utility model can more effectively utilize incident light beam to generate electric energy.

Description

Technical Field

[0001] This utility model relates to a battery module, and more particularly to a solar cell module. Background Technology

[0002] Solar cells convert sunlight into electricity using the photoelectric effect, and are a widely used renewable energy source. As more and more countries prioritize carbon emission control and attempt energy transition, solar cell technology has developed rapidly, and the production cost of solar cells has gradually decreased.

[0003] However, the power generation efficiency of solar cells is not stable due to factors such as the duration of sunlight, the angle of sunlight, and weather conditions. Therefore, how to make solar cells more effectively utilize incident light to generate electricity remains an unsolved problem.

[0004] The "Background Art" paragraph is only used to help understand the content of this utility model. Therefore, the content disclosed in the "Background Art" paragraph may include some known technologies that are not known to those skilled in the art. The content disclosed in the "Background Art" paragraph does not mean that the content or the problems to be solved by one or more embodiments of this utility model were known or recognized by those skilled in the art prior to this application. Utility Model Content

[0005] This invention provides a solar cell module that can more effectively utilize incident light beams to generate electrical energy.

[0006] Other objects and advantages of this utility model can be further understood from the technical features disclosed herein.

[0007] To achieve one, some, or all of the above-mentioned objectives, or other objectives, an embodiment of this utility model provides a solar cell module, including a battery layer and a light-transmitting cover plate. The light-transmitting cover plate is disposed opposite to the battery layer. The light-transmitting cover plate has a first surface and a plurality of microstructures. The first surface faces the battery layer, and the microstructures are located on the first surface and arranged in an array. Each microstructure has a width on the first surface, and each microstructure has a height relative to the first surface, the ratio of height to width being greater than or equal to 0.4 and less than or equal to 4, and each microstructure has a light-guiding surface connected to the first surface, and the light-guiding surface and the first surface have an included angle, the included angle being greater than or equal to 45 degrees and less than or equal to 75 degrees.

[0008] The solar cell module of this invention employs a light-transmitting cover plate with microstructures, wherein the aspect ratio (H / W) of the microstructures is greater than or equal to 0.4 and less than or equal to 4. Therefore, the microstructures can guide the light beam incident on the first surface to enter the cell layer at a large angle, making it easier for the light beam to undergo total internal reflection within the photoelectric conversion layer, thereby increasing the transmission distance of the light beam within the photoelectric conversion layer. Furthermore, the microstructures are arranged in an array on the first surface to increase the number of microstructures, thereby improving the optical effect of the light-transmitting cover plate. In this way, the photoelectric conversion layer can absorb more light energy from the incident light beam and convert it into electrical energy, enabling the solar cell module of this invention to more effectively utilize the incident light beam to generate electrical energy.

[0009] To make the above and other objects, features and advantages of this utility model more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation. Attached Figure Description

[0010] Figure 1 This is a cross-sectional schematic diagram of a solar cell module according to an embodiment of the present invention.

[0011] Figure 2 yes Figure 1 An enlarged schematic diagram of the microstructure of the light-transmitting cover.

[0012] Figure 3 yes Figure 2 A three-dimensional schematic diagram of the microstructure.

[0013] Figure 4 This is a three-dimensional schematic diagram of the microstructure of a solar cell module according to another embodiment of the present invention.

[0014] Figure 5 yes Figure 1 A top view of the light-transmitting cover.

[0015] Figure 6 It is known technology and Figure 1 A schematic diagram of the power generation of a solar cell module versus time in one embodiment.

[0016] Figure 7 This is a cross-sectional schematic diagram of a solar cell module according to another embodiment of the present invention.

[0017] Figure 8 It is known technology and Figure 7 A schematic diagram of the power generation of a solar cell module versus time in one embodiment.

[0018] Figure 9 This is a cross-sectional schematic diagram of a solar cell module according to another embodiment of the present invention.

[0019] Figure 10 It is known technology and Figure 9A schematic diagram of the power generation of a solar cell module versus time in one embodiment.

[0020] Figure 11 This is a cross-sectional schematic diagram of a solar cell module according to another embodiment of the present invention.

[0021] Figure 12 This is a cross-sectional schematic diagram of a solar cell module according to another embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures: 100, 100a, 100b, 100c, 100d: Solar cell modules 110: Battery Layer 111: Photoelectric conversion layer 112: Electrode layer 120, 120b: Light-transmitting cover plate 121: First Surface 122: Second Surface 130, 130b: Encapsulation layer 140: Refractive material layer 150: Anti-reflective coating 160: Reflective layer A: Angle B: Beam BS: Bottom C: Center CS: Surface E1: Concave end point E2: Convex end point G: Minimum Spacing H: Height L: Connection M, Ma, Mb, Mc: Microstructure N: Normal direction O: Opening S, Sa, Sb, Sc: Light guide surface S1, S2: Surface T, Ta, Tb, Tc, Td: Top W: Width. Detailed Implementation

[0023] The foregoing description and other technical contents, features, and effects of this utility model will be clearly presented in the following detailed description of one of the preferred embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, or back, are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the scope of this utility model.

[0024] Figure 1This is a cross-sectional schematic diagram of a solar cell module according to an embodiment of the present invention. Figure 2 yes Figure 1 An enlarged schematic diagram of the microstructure of the light-transmitting cover. Figure 3 yes Figure 2 A three-dimensional schematic diagram of the microstructure. Figure 4 This is a three-dimensional schematic diagram of the microstructure of a solar cell module according to another embodiment of the present invention. Figure 5 yes Figure 1 A top view of the light-transmitting cover.

[0025] Please refer to this first. Figure 1 and Figure 2 The solar cell module 100 includes a cell layer 110 and a light-transmitting cover 120. The light-transmitting cover 120 is disposed opposite to the cell layer 110. The light-transmitting cover 120 has a first surface 121 and a plurality of microstructures M. The first surface 121 faces the cell layer 110, and the microstructures M are located on the first surface 121 and arranged in an array. The width of each microstructure M on the first surface 121 is W, and the height of each microstructure M relative to the first surface 121 is H, wherein the ratio of height H to width W, H / W, is greater than or equal to 0.4 and less than or equal to 4.

[0026] The battery layer 110 can receive the light beam B passing through the light-transmitting cover 120 and convert the light energy of the light beam B into electrical energy. Specifically, the battery layer 110 includes, for example, a photoelectric conversion layer 111 and two electrode layers 112. The photoelectric conversion layer 111 is sandwiched between the two electrode layers 112, and the refractive index of each electrode layer 112 can be less than the refractive index of the photoelectric conversion layer 111. In this way, the light beam B is more likely to undergo total internal reflection within the photoelectric conversion layer 111, thereby increasing the transmission path of the light beam B within the photoelectric conversion layer 111 and enabling the solar cell module 100 to more effectively utilize the light beam B to generate electrical energy. In this embodiment, the material of the electrode layer 112 may include zinc oxide, and the material of the photoelectric conversion layer 111 may include silicon, but this invention does not impose specific material limitations.

[0027] A light-transmitting cover 120 allows a light beam B to pass through and incident on the battery layer 110, the light beam B being, for example, sunlight. In one embodiment, the material of the light-transmitting cover 120 may include glass, and the refractive index of the light-transmitting cover 120 may be approximately 1.5, but this invention does not impose further limitations on this. In this embodiment, the light-transmitting cover 120 may also have a second surface 122 opposite to the first surface 121. Microstructures M are, for example, concave microstructures, recessed from the first surface 121 toward the second surface 122, each microstructure M having an opening O (also labeled as...). Figure 3 ) and concave end point E1 (marked at Figure 2The opening O is located on the first surface 121, and the concave end point E1 is located between the opening O and the second surface 122. Furthermore, the concave end point E1 can be the part of the microstructure M with the largest distance between it and the first surface 121 on the normal N of the first surface 121, so the height H of the microstructure M can be the distance between the opening O and the concave end point E1.

[0028] Furthermore, each microstructure M has a light-guiding surface S. The light-guiding surface S is connected to the first surface 121, and the light-guiding surface S may include a conical surface; for example, in this embodiment, the light-guiding surface S includes a portion of a conical surface. Thus, the microstructure M can refract the light beam B through the conical surface to guide the light beam B to be incident at a large angle onto the battery layer 110, making it easier for the light beam B to undergo total internal reflection within the photoelectric conversion layer 111, thereby increasing the propagation path of the light beam B within the photoelectric conversion layer 111. This facilitates the photoelectric conversion layer 111 absorbing more light energy from the incident light beam B and converting it into electrical energy. For example, the light beam B can be incident at an angle close to 0 degrees (the angle between the direction of travel of the light beam and the normal N) onto the second surface 122, and after passing through the second surface 122, it will be incident on the light-guiding surface S of the microstructure M. Because the propagation path of beam B is deflected when passing through the light guide surface S of microstructure M, beam B will enter the cell layer 110 at an incident angle significantly greater than 0 degrees. This allows beam B to undergo multiple total internal reflections within the photoelectric conversion layer 111, increasing the propagation path of beam B within the photoelectric conversion layer 111. Therefore, the light guide surface S of microstructure M can guide beam B to propagate a longer path within the photoelectric conversion layer 111, enabling the photoelectric conversion layer 111 to effectively absorb the light energy of beam B and convert it into electrical energy, thereby improving the photoelectric conversion efficiency of the solar cell module 100 for beams B with small incident angles. In one embodiment, the angle A between the light guide surface S of microstructure M and the first surface 121 (labeled as...) Figure 2 The included angle A can be approximately greater than or equal to 45 degrees and less than or equal to 75 degrees, but this utility model is not limited to this. It should be noted that the included angle A can be... Figure 3 The angle between the light-guiding surface S of the microstructure M and the line segment on the cross section and the first surface 121, wherein the cross section (corresponding to the ZZ section line) passes through the concave end point E1 of the microstructure M and is perpendicular to the first surface 121.

[0029] Please refer to Figure 1 , Figure 2 and Figure 3In this embodiment, the microstructure M is shaped, for example, as part of a cone (i.e., a cone-like structure), so the light guide surface S can be conical, and the opening O can be circular. The width W of the microstructure M can be the diameter of the opening O. For example, in one embodiment, the width W can be greater than or equal to 10 μm and less than or equal to 40 μm, and the height H can be greater than or equal to 10 μm and less than or equal to 50 μm. In this case, the diameter of the opening O can be approximately between 10 μm and 40 μm (greater than or equal to 10 μm and less than or equal to 40 μm). For example, the width W can be approximately between 10 μm and 12 μm, while in another embodiment, the height H can be approximately between 29 μm and 37 μm, but the present invention is not limited thereto. Incidentally, these microstructures M each have a top T, which connects to the light guide surface S. The top T includes a curved surface CS, allowing the light beam B to be incident more uniformly onto the battery layer 110. In one embodiment, the radius of the curved surface portion can be between 2 μm and 8 μm (i.e., the width of the top T is, for example, between 4 μm and 16 μm), and in another embodiment, the radius of the curved surface portion is, for example, about 5 μm, but the present invention does not impose further limitations on this. In this embodiment, the curved surface CS is, for example, a concave surface, and connects to the side of the light guide surface S opposite to the first surface 121, with the concave endpoint E1 located on the curved surface CS. In another embodiment, the microstructure may not include a top, i.e., the microstructure is conical in shape, the light guide surface S is a conical surface, and the concave endpoint is the vertex of the conical surface.

[0030] It is understandable that the shape of the microstructure M is not limited to the aforementioned cone-like shape. Please refer to... Figure 4 (a) The shape of the microstructure Ma is, for example, a pyramidal shape, and the plurality of apexes Ta of these microstructures Ma each include a curved surface. For example, the shape of the microstructure Ma may be approximately a quadrangular pyramid, and the apexes Ta of the microstructure Ma may be the curved surface. Furthermore, the light guide surface Sa may include an inclined surface that is tilted relative to the first surface 121. Specifically, the microstructure Ma of this embodiment may have four light guide surfaces Sa, and all four light guide surfaces Sa are the aforementioned inclined surfaces (i.e., the four inclined surfaces of a quadrangular pyramid). The function of the light guide surface Sa is roughly the same as... Figure 3 The characteristics of the light guide surface S and the top Ta are roughly the same. Figure 3 The top T is omitted here. Incidentally, the width W of the microstructure Ma can be the side length or diagonal of the base (i.e., opening O) of the quadrangular pyramid. For example, in this embodiment, the width W can be the side length or diagonal of the quadrilateral base of the microstructure Ma. In one embodiment, the shape of the microstructure Ma can be a hexagonal pyramid or a hexagonal-like pyramid, and the width W of the microstructure Ma can be the side length or diagonal of the hexagonal base of the hexagonal pyramid; however, this invention does not impose further limitations on this.

[0031] Please refer to Figure 4(b) In other embodiments, the microstructure Mb may be shaped like a frustum of a cone, wherein the light-guiding surface Sb of the microstructure Mb may be conical, and the top Tb of the microstructure Mb may be planar. Thus, the planar top Tb allows more light beams to pass through and enter the battery layer 110 (drawn on...). Figure 1 This allows the photoelectric conversion layer 111 to absorb more light energy from the incident beam and convert it into electrical energy. On the other hand, such as Figure 4 As shown in (c), the shape of the microstructure Mc can be a frustum, such as a quadrangular frustum, wherein the light-guiding surface Sc of the microstructure Mc can be an inclined surface relative to the first surface 121, and the top Tc of the microstructure Mc is planar. The characteristics and functions of the top Tc in (c) are the same as those of the top Tb in (b), so the relevant description is omitted here.

[0032] Please refer to Figure 1 and Figure 5 In this embodiment, the microstructures M can be arranged in a roughly arrayed manner on the first surface 121 to increase the number of microstructures M on the first surface 121, thereby making the optical effect provided by the light-transmitting cover 120 more significant. Specifically, the microstructures M can be arranged in a honeycomb pattern on the first surface 121 (for example, the angle between the two arrangement directions of the array is 60 degrees). This allows the microstructures M to be arranged more closely on the first surface 121, further increasing the number of microstructures M on the first surface 121 and making the optical effect provided by the light-transmitting cover 120 more significant. For example, in any seven adjacent microstructures M, six microstructures M can be arranged in a roughly hexagonal shape, and the third microstructure M can be surrounded by the aforementioned six microstructures M, making the seven microstructures M as close to each other as possible. In one embodiment, the minimum spacing G between two adjacent microstructures M can be greater than or equal to 0.5 μm and less than or equal to 10 μm, exposing a portion of the first surface 121 between the microstructures M, allowing more light beams B to pass through the first surface 121 into the cell layer 110, thereby further improving the photoelectric conversion efficiency of the solar cell module 100. Furthermore, the shape of the openings O of each microstructure M can be approximately circular, so the minimum spacing G between two adjacent microstructures M is, for example, approximately parallel to the line L connecting the centers C of two adjacent openings O.

[0033] Please continue to refer to this. Figure 1 The first surface 121 is located inside the solar cell module 100, while the second surface 122 is exposed and more susceptible to contamination. Therefore, in this embodiment, the microstructure M is located on the first surface 121, and the second surface 122 can be approximately planar, making the second surface 122 easy to clean and preventing dust from accumulating inside the microstructure M and affecting its optical performance.

[0034] Incidentally, the solar cell module 100 may also include two encapsulation layers 130, which cover opposite surfaces S1 and S2 of the cell layer 110 to protect the cell layer 110. Specifically, surface S1 may be located on the side of one electrode layer 112 facing away from the cell layer 110, and surface S2 may be located on the side of the other electrode layer 112 facing away from the cell layer 110. The two encapsulation layers 130 respectively cover the two electrode layers 112. The material of the encapsulation layer may include, for example, ethylene vinyl acetate (EVA), and the refractive index may be about 1.5, but this invention does not impose further limitations on this.

[0035] Compared to known technologies, the solar cell module 100 of this embodiment employs a light-transmitting cover plate 120 with a microstructure M, wherein the aspect ratio H / W of the microstructure M is greater than or equal to 0.4 and less than or equal to 4. Therefore, when arranging the solar cell module 100, it can be positioned as close to the sun as possible to reduce the reflection of sunlight by the outer surface (i.e., the second surface 122) of the light-transmitting cover plate 120. Furthermore, the microstructure M disposed on the first surface 121 can guide the light beam B transmitted to the first surface 121 to be incident on the cell layer 110 at a large angle, making it easier for the light beam B to undergo total internal reflection within the photoelectric conversion layer 111, thereby increasing the transmission path of the light beam B within the photoelectric conversion layer 111. In addition, the microstructures M are arranged in an array on the first surface 121 to increase the number of microstructures M, thereby improving the optical effect of the light-transmitting cover plate 120. Thus, the photoelectric conversion layer 111 can absorb more light energy from the incident light beam B and convert it into electrical energy, enabling the solar cell module 100 of this embodiment to more effectively utilize the incident light beam B to generate electrical energy.

[0036] Figure 6 It is known technology and Figure 1 A schematic diagram illustrating the power generation versus time of a solar cell module according to one embodiment, wherein the known solar cell module does not have a light-transmitting cover 120 having a microstructure M. Additionally, Figure 6 The microstructure M of the light-transmitting cover 120 of the solar cell module 100 has a width W of approximately 16.8 μm and a height H of, for example, approximately 21 μm. Please refer to [reference needed]. Figure 1 and Figure 6Compared to known solar cell modules, the power generation of the solar cell module 100 in this embodiment increases from approximately 9 to 15 o'clock, with the most significant increase occurring between 11 and 13 o'clock. Specifically, because the sunlight angle between 11 and 13 o'clock is closest to direct sunlight, most of the light beam enters the light-transmitting cover plate 120 at a small angle and is refracted by the microstructure M to enter the cell layer 110 at a large angle. This results in total internal reflection within the cell layer 110, allowing it to more effectively absorb the light energy of the incident beam and convert it into electrical energy, thereby increasing the power generation of the solar cell module 100. Incidentally, in one embodiment, when the H / W ratio of the microstructure M is approximately 1.575, the solar cell module 100 increases light energy absorption by approximately 23.6% compared to known solar cell modules. In another embodiment, when the H / W ratio of the microstructure M is approximately 2.1, the solar cell module 100 increases light energy absorption by approximately 23.9% compared to known solar cell modules. It is understood that the above values ​​are examples and not intended to limit this invention.

[0037] Figure 7 This is a cross-sectional schematic diagram of a solar cell module according to another embodiment of the present invention. Figure 8 It is known technology and Figure 7 A schematic diagram illustrating the power generation and time of a solar cell module according to one embodiment. The structure and advantages of the solar cell module 100a in this embodiment are similar to... Figure 1 The following describes only the differences in the embodiments. Please refer to [the previous text]. Figure 7 The light-transmitting cover 120 may further include a refractive material layer 140, and the refractive material layer 140 (at least a portion of the refractive material layer 140) fills the microstructure M to increase the refraction angle when the light beam is incident from the light-transmitting cover 120 to the refractive material layer 140, allowing the light beam to be incident on the cell layer 110 at a larger incident angle. Thus, the light beam can more easily travel a longer distance within the photoelectric conversion layer 111 via total internal reflection, allowing the solar cell module 100a to more effectively utilize the incident light beam to generate electricity. In one embodiment, the refractive index of the refractive material layer 140 is, for example, between 1.6 and 2.2, so that most of the light beam, after passing through the refractive material layer 140, can be incident on the cell layer 110 and transmitted via total internal reflection within the photoelectric conversion layer 111, thereby further improving light utilization.

[0038] For example, please refer to the following: Figure 7 and Figure 8In one embodiment of this invention, the refractive index of the refractive material layer 140 is approximately 1.7, the width W of the microstructure M is approximately 20 μm, and the height H of the microstructure M is approximately 16.8 μm. Compared to known solar cell modules, the solar cell module 100a of this embodiment can significantly improve power generation during sunshine hours, especially between 11:00 AM and 1:00 PM when the sunlight angle is close to direct. The solar cell module 100a can effectively guide light beams with small incident angles through the photoelectric conversion layer 111 via total internal reflection, allowing the cell layer 110 to more effectively absorb the incident light beam and convert it into electrical energy, thereby increasing the power generation of the solar cell module 100a. In another embodiment, the solar cell module 100a uses a refractive material layer 140 with a refractive index of approximately 1.7 and a microstructure M with an H / W ratio of approximately 1.79–1.84 or 1.79–1.82. Compared to known solar cell modules, the solar cell module 100a can increase light energy absorption by approximately 24%. Furthermore, in one embodiment, the refractive index of the refractive material layer 140 may be approximately between 1.8 and 2, but the present invention is not limited thereto. In this embodiment, the material of the refractive material layer 140 may include silicone, ethylene vinyl acetate (EVA), polycarbonate (PC), polydimethylsiloxane (PDMS), or polymethyl methacrylate (PMMA), and other embodiments are not limited thereto. In another embodiment, the refractive material layer 140 and the encapsulation layer 130 may be made of the same material, for example, and have the same refractive index.

[0039] Figure 9 This is a cross-sectional schematic diagram of a solar cell module according to another embodiment of the present invention. Figure 10 It is known technology and Figure 9 A schematic diagram illustrating the power generation and time of a solar cell module according to one embodiment. The structure and advantages of the solar cell module 100b in this embodiment are similar to... Figure 1 The following describes only the differences in the embodiments. Please refer to [the previous text]. Figure 9The microstructure Mb protrudes from the first surface 121 and has a bottom surface BS and a protruding end point E2. The bottom surface BS is located on the first surface 121, and the protruding end point E2 protrudes towards the battery layer 110 to guide the light beam to be incident on the battery layer 110 at a large angle. Furthermore, the bottom surface BS is coplanar with the first surface 121, and the height H of the microstructure Mb can be the distance between the bottom surface BS (or the first surface 121) and the protruding end point E2. In addition, the shape of the microstructure Mb can include a cone or a pyramid; this embodiment uses a cone as an example, and the top Td of the microstructure Mb is the protruding end point E2. Incidentally, the bottom surface BS in this embodiment is approximately circular, so the width W of the microstructure Mb can be the diameter of the bottom surface BS. As mentioned above, the definition of the width W of the microstructure Mb can vary depending on the shape of the bottom surface BS, and related descriptions are omitted here.

[0040] In one embodiment, the refractive index of the microstructure Mb is, for example, between 1.6 and 2.2. This not only increases the incident angle of the light beam onto the battery layer 110, but also prevents the light beam from being reflected back to the light-transmitting cover plate 120b due to an excessively large incident angle onto the battery layer 110. This allows most of the light beam to enter the battery layer 110 at a large incident angle after passing through the microstructure Mb, which facilitates the transmission of the light beam through total internal reflection within the photoelectric conversion layer 111, thereby further improving the utilization rate of incident light by the solar cell module 100b.

[0041] For example, please refer to the following: Figure 9 and Figure 10 In one embodiment of this invention, the solar cell module 100b employs a microstructure Mb with a refractive index of approximately 1.7, a width W of approximately 20 μm, and a height H of approximately 2.1 μm. Compared to known solar cell modules, the solar cell module 100b of this embodiment increases power generation during the sunshine period, particularly during the period from 11:00 AM to 1:00 PM when the sunlight angle is close to direct, resulting in a significant increase in power generation. In one embodiment, the solar cell module 100b employs a microstructure Mb with a refractive index of approximately 1.7 and an H / W ratio of approximately 1.79–1.84 or 1.79–1.82. In this case, the solar cell module 100b can increase light energy absorption by approximately 24% compared to known solar cell modules. It is understood that the above values ​​are examples and are not intended to limit the present invention.

[0042] In this embodiment, the material of the microstructure Mb may include silicone, ethylene vinyl acetate (EVA), polycarbonate (PC), polydimethylsiloxane (PDMS), or polymethyl methacrylate (PMMA), that is, the material of the microstructure Mb can be the same as... Figure 7The refractive material layer 140 has a material different from that of the light-transmitting cover 120b. Incidentally, the encapsulation layer 130b sandwiched between the light-transmitting cover 120b and the battery layer 110 can cover the microstructure Mb, and the refractive index of the microstructure Mb is different from that of the encapsulation layer 130b. The encapsulation layer 130b in this embodiment has the same characteristics as... Figure 1 The encapsulation layer is 130, so the relevant description is omitted here.

[0043] Figure 11 This is a cross-sectional schematic diagram of a solar cell module according to another embodiment of the present invention. The structure and advantages of the solar cell module 100c in this embodiment are similar to those of... Figure 1 The following describes only the differences in the embodiments. Please refer to... Figure 11 The solar cell module 100c may also include an anti-reflective film 150, which is disposed on the second surface 122 of the light-transmitting cover 120 to increase the amount of light incident on the solar cell module 100c. In this way, the cell layer 110 can convert more light energy into electrical energy, thereby further improving the power generation efficiency of the solar cell module 100c. The anti-reflective film 150 may include, for example, an anti-reflective coating (AR), but other embodiments are not limited to this.

[0044] Figure 12 This is a cross-sectional schematic diagram of a solar cell module according to another embodiment of the present invention. The structure and advantages of the solar cell module 100d in this embodiment are similar to those of other solar cell modules. Figure 1 The following describes only the differences in the embodiments. Please refer to... Figure 12 The solar cell module 100d may also include a reflective layer 160. The reflective layer 160 is disposed on the side of the cell layer 110 opposite to the light-transmitting cover plate 120 to reflect light beams back to the cell layer 110, thereby improving the light utilization rate of the solar cell module 100d. The material of the reflective layer 160 may include metal. For example, in one embodiment, the material of the reflective layer 160 may include aluminum or silver, but the present invention is not limited thereto.

[0045] In summary, the solar cell module of this invention has at least one of the following advantages. The solar cell module of this invention employs a light-transmitting cover plate with microstructures, wherein the aspect ratio (H / W) of the microstructures is greater than or equal to 0.4 and less than or equal to 4. Therefore, the microstructures can guide the light beam incident on the first surface to enter the cell layer at a large angle, making it easier for the light beam to undergo total internal reflection within the photoelectric conversion layer, thereby increasing the transmission distance of the light beam within the photoelectric conversion layer. Furthermore, the microstructures are arranged in an array on the first surface to increase the number of microstructures, thereby improving the optical effect of the light-transmitting cover plate. Thus, the photoelectric conversion layer can absorb more light energy from the incident light beam and convert it into electrical energy, enabling the solar cell module of this invention to more effectively utilize the incident light beam to generate electrical energy.

[0046] The above description is merely a preferred embodiment of this utility model and should not be construed as limiting the scope of this utility model. Any simple equivalent changes and modifications made in accordance with the claims and content of this utility model shall still fall within the scope of this utility model patent. Furthermore, no embodiment or claim of this utility model needs to achieve all the objectives, advantages, or features disclosed in this utility model. In addition, the abstract and title of the utility model are only used to assist in patent document retrieval and are not intended to limit the scope of this utility model. Furthermore, the terms "first," "second," etc., mentioned in this specification or claims are only used to name elements or distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of elements.

Claims

1. A solar cell module, characterized in that, The solar cell module includes a cell layer and a light-transmitting cover, wherein: The light-transmitting cover is disposed opposite to the battery layer. The light-transmitting cover has a first surface and a plurality of microstructures. The first surface faces the battery layer, and the plurality of microstructures are located on the first surface and arranged in an array. Each of the plurality of microstructures has a width on the first surface and a height relative to the first surface. The ratio of the height to the width is greater than or equal to 0.4 and less than or equal to 4. Each of the plurality of microstructures has a light-guiding surface connected to the first surface, and there is an angle between the light-guiding surface and the first surface. The angle is greater than or equal to 45 degrees and less than or equal to 75 degrees.

2. The solar cell module according to claim 1, characterized in that, The light-transmitting cover also has a second surface opposite to the first surface. The plurality of microstructures are recessed from the first surface toward the second surface. Each of the plurality of microstructures has an opening and a recessed end point. The opening is located on the first surface, and the recessed end point is located between the opening and the second surface.

3. The solar cell module according to claim 2, characterized in that, The light-transmitting cover also includes a refractive material layer, which is filled within the plurality of microstructures, and the refractive index of the refractive material layer is between 1.6 and 2.

2.

4. The solar cell module according to claim 1, characterized in that, The plurality of microstructures protrude from the first surface and each has a bottom surface and a convex end point. The bottom surface is located on the first surface, and the convex end point protrudes in a direction opposite to the bottom surface. The refractive index of the plurality of microstructures is between 1.6 and 2.

2.

5. The solar cell module according to claim 1, characterized in that, The width is greater than or equal to 10 μm and less than or equal to 40 μm, and the height is greater than or equal to 10 μm and less than or equal to 50 μm.

6. The solar cell module according to claim 1, characterized in that, The light guide surface includes at least a portion of a conical surface or at least one inclined surface that is tilted relative to the first surface.

7. The solar cell module according to claim 1, characterized in that, The shapes of the multiple microstructures are cones, frustums of cones, pyramids, or frustums of pyramids.

8. The solar cell module according to claim 1, characterized in that, The multiple microstructures are cone-like or pyramid-like in shape, and the multiple tops of the multiple microstructures each include a curved surface.

9. The solar cell module according to claim 1, characterized in that, The multiple microstructures are arranged in a honeycomb pattern on the first surface.

10. The solar cell module according to claim 9, characterized in that, The minimum spacing between any two adjacent microstructures is greater than or equal to 0.5 μm and less than or equal to 10 μm.

11. The solar cell module according to claim 1, characterized in that, It also includes an anti-reflective film, wherein the light-transmitting cover plate further has a second surface opposite to the first surface, and the anti-reflective film is disposed on the second surface.

12. The solar cell module according to claim 1, characterized in that, The battery layer includes a photoelectric conversion layer and a two-electrode layer, with the photoelectric conversion layer sandwiched between the two-electrode layers. The refractive index of each of the two-electrode layers is less than that of the photoelectric conversion layer.

13. The solar cell module according to claim 1, characterized in that, It includes a reflective layer, wherein the reflective layer is disposed on the side of the battery layer opposite to the light-transmitting cover.

14. The solar cell module according to claim 1, characterized in that, It also includes a second encapsulation layer, wherein the second encapsulation layer covers two opposing surfaces of the battery layer.

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