TWI481044B - Solar concentrator - Google Patents

Description

Solar collector structure

The present invention relates to a solar device, and more particularly to a solar light collecting structure.

With the depletion of the earth's resources and the development of technology, it has caused a shortage of international energy. In view of this, all countries in the world are actively engaged in the research and development of various alternative energy sources. Among them, the development of solar power generation equipment, such as solar cells, has attracted attention because of the inexhaustible use of sunlight.

A solar cell battery is generally a renewable energy source that directly generates electricity by interacting with a semiconductor material, wherein the solar cell does not emit any gas, including carbon dioxide, and thus is a non-polluting green energy source that can improve the earth. The problem of the greenhouse effect.

The solar cell uses the photoelectric effect of the semiconductor to directly absorb sunlight to generate electricity. The principle of power generation is that when the sunlight is irradiated on the solar cell, the solar cell absorbs the solar energy, and the p-type semiconductor and the n-type semiconductor of the solar cell respectively Electrons and holes are created, and electrons are separated from the holes to form a voltage drop, which in turn generates a current.

At present, in order to improve the light absorbing ability of a solar cell, the design of the light collecting structure of the solar cell is changed. Please refer to FIG. 1A, which is a schematic diagram of light collection of a conventional solar light collecting structure. A plurality of trenches 104 are disposed on the entire surface 102 of the conventional solar light collecting structure 100. When the sun 106 illuminates the surface 102 of the solar light collecting structure 100, the grooves 104 The incident sunlight 108 can be directed downward to increase the absorption of energy to the sunlight 108.

However, as shown in FIG. 1B, when the sunlight 108 is at a low angle relative to the surface 102 of the solar light collecting structure 100, the groove 104 of the surface 102 of the solar light collecting structure 100 cannot effectively guide the sunlight 108 downward. . Therefore, when the sun 106 is at a low angle, the design of the conventional solar light collecting structure 100 cannot achieve a good light collecting effect.

Therefore, with the shortage of energy, there is a need for a solar light collecting structure with high light collecting effect to enhance the absorption efficiency of solar cells for solar energy.

Therefore, an aspect of the present invention provides a solar light collecting structure including at least one light collecting unit, and each light collecting unit includes at least a cone, wherein the light incident surface and the light collecting surface of the light collecting unit are respectively set On different sides of the cone. With the design of the cone, the direction of the incident light that can be extracted is wider, so it has a very high light collecting ability.

Another aspect of the present invention provides a solar light collecting structure, wherein the light collecting unit includes at least one cylinder, and opposite sides of each light collecting unit include a light incident surface and a plurality of light collecting surfaces. The design of the cylinder can increase the extraction range of the incident light, and can guide the incident light to the collecting surface of the other side, thereby increasing the number of collisions between the incident light and the photoelectric conversion layer in the solar collecting structure. Therefore, the light absorption efficiency can be improved, and the photoelectric conversion efficiency can be effectively improved. Therefore, the solar light collecting structure of the present invention not only has a wide range of incident light extraction, but also has a relatively excellent light absorbing effect.

According to the above object of the present invention, a solar light collecting structure is provided, comprising: at least one light collecting unit, comprising: at least one cone, and the cone comprises a light incident surface and at least one light collecting surface, the at least one set The light surface is adjacent to the light incident surface; and a photoelectric conversion layer covers at least one of the aforementioned light collecting surfaces.

According to an embodiment of the invention, the cone is a triangular cone, a quadrangular pyramid, or a polygonal cone.

According to the above object of the present invention, a solar concentrating structure is further provided, comprising: at least one concentrating unit, comprising: at least one cylinder, and the cylinder comprises a light incident surface and a plurality of first concentrating surfaces and a plurality of a second light collecting surface, the light incident surface and the first light collecting surface and the second light collecting surface are located on opposite sides of the at least one light collecting unit, wherein the light incident surface is opposite to the second light collecting surface; and a photoelectric The conversion layer covers the first light collecting surface and the second light collecting surface as described above.

According to an embodiment of the invention, the first light collecting surface comprises a W-shaped outer shape, a U-shaped outer shape, or a V-shaped outer shape.

Referring to FIG. 2 and FIG. 3 together, FIG. 2 is a schematic perspective view of a solar light collecting structure according to an embodiment of the present invention, and a schematic cross-sectional view of the light collecting unit of the solar light collecting structure. In the present embodiment, the solar energy collecting structure 200 of the solar cell includes at least one light collecting unit 202. In the exemplary embodiment shown in FIG. 2, the solar light collecting structure 200 is composed of a plurality of light collecting units 202.

As shown in FIG. 3, each light collecting unit 202 mainly includes a cone 208. And a photoelectric conversion layer 204. The material of the cone 208 may be a transparent material to facilitate the passage of light therethrough. In the exemplary embodiment shown in FIGS. 2 and 3, the cone 208 is a quadrangular pyramid, and thus the cone 208 includes a light incident surface 210 and a plurality of light collecting surfaces 212, wherein the light incident surface 210 is a cone. One side of the 208, the light collecting surface 212 is the other side of the cone 208, and the collecting surfaces 212 are adjacent to the light incident surface 210. In other embodiments, the cone 208 can also be a triangular pyramid or a polygonal cone, and the triangular pyramid or polygonal cone also includes a light incident surface and a plurality of light collecting surfaces.

In another exemplary embodiment, the cone of the light collecting unit may also adopt a cone or an elliptical cone, and the cone or elliptical cone includes a light incident surface and a light collecting surface, wherein the light incident surface is a cone One of the planes of the body or the elliptical cone, the light collecting surface is the side of the cone or the elliptical cone, and the collecting surface is adjacent to the light incident surface.

Referring again to FIG. 3, the photoelectric conversion layer 204 of the light collecting unit 202 covers all of the light collecting faces 212 of the cone 208, wherein the photoelectric conversion layer 204 has the ability to absorb light to generate electricity. The photoelectric conversion layer 204 of the light collecting unit 202 of the solar light collecting structure 200 generally includes a p-type semiconductor layer, an n-type semiconductor layer, and/or an i-type semiconductor layer (not shown), wherein the intrinsic type (i- The type semiconductor layer is usually interposed between the p-type semiconductor layer and the n-type semiconductor layer. In an exemplary embodiment, the light collecting unit 202 further selectively includes an anti-reflective structure 206, wherein the anti-reflective structure 206 covers the light incident surface 210 of the cone 208 to facilitate smooth entry of light through the light incident surface 210. In the body 208, the light extraction rate of the light collecting unit 202 is thereby increased. The anti-reflective structure 206 can be coated with an anti-reflective film on the light incident surface 210 of the cone 208 or can be surface treated by the light incident surface 210 of the cone 208. An anti-reflection microstructure formed on the light incident surface 210.

Referring to FIGS. 2 and 3, since each light collecting unit 202 of the solar light collecting structure 200 is composed of a transparent cone 208, when incident light such as sunlight is opposite to the cone 208 of the light collecting unit 202. When the light incident surface 210 is at a low angle, the incident light can be guided downward and collide with the photoelectric conversion layer 204 on the collecting surface 212 of the cone 208 multiple times, thereby improving light absorption efficiency and thus expanding The effective light collecting range of the solar light collecting structure 200 can effectively improve the photoelectric conversion efficiency.

Please refer to FIG. 4 , which is a cross-sectional view showing a light collecting unit of a solar light collecting structure according to another embodiment of the present invention. In the present embodiment, the solar light collecting structure 300 includes at least one light collecting unit 310. Each of the light collecting units 310 mainly includes at least one pillar 302 and a photoelectric conversion layer 304. The material of the pillars 302 may be made of a transparent material to facilitate light passage. In an exemplary embodiment, the cylinder 302 includes a light incident surface 306 and a plurality of first light collecting surfaces 308 and a second light collecting surface 314, wherein the light incident surface 306 is one side of the column 302, and the first light collecting surface The 308 and the second concentrating surface 314 are the other sides of the cylinder 302 , and the first concentrating surface 308 and the second concentrating surface 314 and the light incident surface 306 are located on opposite sides of the cylinder 302 . In the exemplary embodiment shown in FIG. 4, the first light collecting surface 308 of the cylinder 302 constitutes a W-shaped outer shape, and the second light collecting surface 314 is opposed to the light incident surface 306. In other embodiments, the first light collecting surface 308 of the cylinder may also form a V-shaped outer shape or a U-shaped outer shape.

The photoelectric conversion layer 304 of the light collecting unit 310 covers all of the first light collecting surface 308 and the second light collecting surface 314 of the cylinder 302, wherein the photoelectric conversion layer 304 has the ability to absorb light to generate electricity. In an exemplary embodiment, collecting light The unit 310 can further include an anti-reflection structure 312, wherein the anti-reflection structure 312 covers the light incident surface 306 of the cylinder 302 to facilitate smooth entry of light into the cylinder 302 via the light incident surface 306 to improve the light collecting unit. 310 light extraction rate. Similarly, the anti-reflective structure 312 may be coated on the light incident surface 306 of the cylinder 302 or may be formed on the light incident surface 306 by surface treatment of the light incident surface 306 of the cylinder 302. Anti-reflective microstructure.

Referring to FIG. 4 again, since each of the light collecting units 310 of the solar light collecting structure 300 is composed of a transparent cylinder 302, when the incident light of sunlight or the like is incident on the cylinder 302 of the light collecting unit 310. When the surface 306 is at a low angle, the incident light can be guided downward and collide with the photoelectric conversion layer 304 on the first light collecting surface 308 and the second light collecting surface 314 of the cylinder 302, thereby causing multiple collisions. The light absorption efficiency can be improved, and the light collecting range of the solar light collecting structure 300 can be expanded, thereby further improving the photoelectric conversion efficiency. In addition, the incident light of a low angle can be reflected back and forth between the light incident surface 306 and the second light collecting surface 314 opposite to each other, and the light absorption efficiency can also be increased.

Please refer to FIG. 5, which is a perspective view of a solar light collecting structure according to still another embodiment of the present invention. In the present embodiment, the solar light collecting structure 400 includes a plurality of light collecting units 402. Each of the light collecting units 402 mainly includes a cylinder 404 and a photoelectric conversion layer 406, wherein the material of the pillars 404 can be a transparent material. In an exemplary embodiment, each of the pillars 404 includes a light incident surface 408 and a plurality of first light collecting surfaces 410 and a second light collecting surface 414, wherein the light incident surface 408 is one side of the cylinder 404, the first set The smooth surface 410 and the second light collecting surface 414 are the other sides of the cylinder 404, and the first light collecting surface 410 and the second light collecting surface 414 and the light incident surface 408 are located on the column. The opposite sides of the body 404. In the exemplary embodiment shown in FIG. 5, the first light collecting surface 410 of the cylinder 404 constitutes a U-shaped outer shape, and the second light collecting surface 414 is opposite to the light incident surface 408. The incident light of a low angle can be reflected back and forth between the light incident surface 408 and the second light collecting surface 414 opposite to each other, and the light absorption efficiency can be increased.

The photoelectric conversion layer 406 of the light collecting unit 402 covers all of the first light collecting surface 410 and the second light collecting surface 414 of the cylinder 404. In an exemplary embodiment, the light collecting unit 402 further selectively includes an anti-reflective structure 412, wherein the anti-reflective structure 412 covers the light incident surface 408 of the pillar 404 to facilitate incident light passing through the light incident surface 408. Successfully enters the cylinder 404. Similarly, the anti-reflective structure 412 may be coated on the light incident surface 408 of the pillar 404 or may be formed on the light incident surface 408 by surface treatment of the light incident surface 408 of the pillar 404. Anti-reflective microstructure.

According to the embodiment of the present invention, an advantage of the present invention is that the solar light collecting structure of the present invention comprises at least one light collecting unit, and each light collecting unit includes at least a cone, wherein the light collecting surface and the light collecting unit The glossy surfaces are respectively placed on different sides of the cone. With the design of the cone, the direction of the incident light that can be extracted is wider, so it has a very high light collecting ability.

According to the embodiment of the present invention, another advantage of the present invention is that the light collecting unit of the solar light collecting structure of the present invention comprises at least one cylinder, and the opposite sides of each cylinder comprise a light incident surface and a plurality of sets. Glossy. The design of the cylinder can increase the extraction range of the incident light, and can guide the incident light to the collecting surface of the other side, thereby increasing the number of collisions between the incident light and the photoelectric conversion layer in the solar collecting structure. Therefore, the light absorption efficiency can be improved, and the photoelectric conversion efficiency can be effectively improved. Therefore, the solar collector knot of the present invention The structure not only has a wide range of incident light extraction, but also has a relatively excellent light absorption effect.

Although the present invention has been described above in terms of a preferred embodiment, it is not intended to limit the invention, and it is intended that various modifications may be made without departing from the spirit and scope of the invention. And the scope of the present invention is defined by the scope of the appended claims.

100‧‧‧Solar light collecting structure

102‧‧‧ surface

104‧‧‧ trench

106‧‧‧The sun

108‧‧‧Sunlight

200‧‧‧Solar collecting structure

202‧‧‧Light collecting unit

204‧‧‧Photoelectric conversion layer

206‧‧‧Anti-reflective structure

208‧‧‧ cone

210‧‧‧Into the glossy surface

212‧‧‧Gathering surface

300‧‧‧Solar collecting structure

302‧‧‧Cylinder

304‧‧‧ photoelectric conversion layer

306‧‧‧Into the glossy surface

308‧‧‧ first episode

310‧‧‧Light collecting unit

312‧‧‧Anti-reflective structure

314‧‧‧The second episode

402‧‧‧Light collecting unit

400‧‧‧Solar collecting structure

406‧‧‧Photoelectric conversion layer

404‧‧‧Cylinder

410‧‧‧ first episode

408‧‧‧Into the glossy surface

414‧‧‧The second episode

412‧‧‧Anti-reflective structure

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood. The description of the drawings is as follows: FIG. 1A is a schematic diagram of light collection of a conventional solar light collecting structure.

FIG. 1B is a schematic view showing another angle of light collection of a conventional solar light collecting structure.

2 is a perspective view showing a solar light collecting structure according to an embodiment of the present invention.

3 is a cross-sectional view showing a light collecting unit of a solar light collecting structure according to an embodiment of the present invention.

4 is a cross-sectional view showing a light collecting unit of a solar light collecting structure according to another embodiment of the present invention.

FIG. 5 is a perspective view showing a solar light collecting structure according to still another embodiment of the present invention.

200‧‧‧Solar collecting structure

202‧‧‧Light collecting unit

204‧‧‧Photoelectric conversion layer

206‧‧‧Anti-reflective structure

Claims (4)

A solar light collecting structure comprising: at least one light collecting unit, comprising: at least one transparent cylinder, wherein the at least one transparent cylinder comprises a light incident surface and a plurality of first light collecting surfaces and a plurality of second light collecting surfaces The light incident surface and the first light collecting surface and the second light collecting surface are located on opposite sides of the transparent pillar, wherein the light incident surface is opposite to the second light collecting surfaces; a layer covering the first concentrating surface and the second concentrating surfaces; and an anti-reflection structure covering the illuminating surface, wherein an incident light enters the transparent cylinder via the illuminating surface The collision covers the photoelectric conversion layers on the first concentrating surface and the second concentrating surfaces. The solar light collecting structure according to claim 1, wherein the first light collecting surfaces constitute a W-shaped outer shape. The solar light collecting structure according to claim 1, wherein the first light collecting surfaces constitute a U-shaped outer shape. The solar light collecting structure according to claim 1, wherein the first light collecting surfaces constitute a V-shaped outer shape.