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CN-122028515-A - Cadmium telluride and crystalline silicon stacked BIPV assembly

CN122028515ACN 122028515 ACN122028515 ACN 122028515ACN-122028515-A

Abstract

The invention discloses a cadmium telluride and crystalline silicon laminated BIPV assembly, which comprises a back plate, a first packaging layer, a crystalline silicon chip layer, a cadmium telluride chip layer, a second packaging layer and a front plate which are sequentially overlapped, wherein the front plate comprises a base layer, the base layer is arranged on one side surface of the second packaging layer, which is far away from the cadmium telluride chip layer, a plurality of nanometer prismatic tables are uniformly arrayed on one side surface of the base layer, which is far away from the second packaging layer, the bottom ends of the nanometer prismatic tables are larger than the top ends of the nanometer prismatic tables, the bottom ends of the nanometer prismatic tables are close to the base layer, the top ends of the nanometer prismatic tables are provided with top table boards which are arranged side by side with the base layer, and the bottom end edge of each nanometer prismatic table is connected with the bottom end edge of the corresponding nanometer prismatic table around so as to form nanometer light traps between the nanometer prismatic tables. According to the BIPV component provided by the invention, the nano light traps are formed by the plurality of nano prismatic tables uniformly arrayed on the front plate, so that the physical limit of traditional light trapping is broken through, the efficient trapping of short-wave and long-wave full-wave sunlight is realized, and the power generation efficiency loss caused by insufficient light reflection and penetration is reduced.

Inventors

  • PAN ZHILIN
  • CHEN KAI
  • ZHOU ZHUANGDA
  • ZHAO ZHIBO

Assignees

  • 广东明阳薄膜科技有限公司

Dates

Publication Date
20260512
Application Date
20260109

Claims (10)

  1. 1. The cadmium telluride and crystalline silicon laminated BIPV component is characterized by comprising a back plate (100), a first packaging layer (200), a crystalline silicon chip layer (300), a cadmium telluride chip layer (500), a second packaging layer (600) and a front plate (700) which are sequentially overlapped, The front plate (700) comprises a base layer (710), the base layer (710) is arranged on one side surface of the second packaging layer (600) deviating from the cadmium telluride chip layer (500), the visible light transmittance of the base layer (710) is more than or equal to 92%, a plurality of nanometer prismatic tables (720) are uniformly arrayed on one side surface of the base layer (710) deviating from the second packaging layer (600), the bottom ends of the nanometer prismatic tables (720) are larger than the top ends of the nanometer prismatic tables (720), the bottom ends of the nanometer prismatic tables (720) are close to the base layer (710), the top ends of the nanometer prismatic tables (720) are provided with top table boards (721) which are arranged side by side with the base layer (710), and the bottom end edge of each nanometer prismatic table (720) is connected with the bottom end edge of the corresponding nanometer prismatic table (720) around so as to form nanometer light traps (730) between the nanometer prismatic tables (720).
  2. 2. The cadmium telluride and crystalline silicon laminate BIPV assembly of claim 1, wherein the second encapsulant layer (600) is a modified PVB layer modified with nano titanium dioxide particles, uv absorber, antioxidants.
  3. 3. The cadmium telluride and crystalline silicon stacked BIPV assembly according to claim 1, wherein the arrangement spacing between two adjacent nano-lands (720) is 300-500nm, the height of the nano-lands (720) and the depth of the nano-optical traps (730) is 200-300nm.
  4. 4. The cadmium telluride and crystalline silicon stack BIPV assembly of claim 1 wherein the bottom end profile of the nano-prismatic table (720) is a regular hexagon, the top mesa (721) of the nano-prismatic table (720) is a regular triangle, the six sides of the bottom end of the nano-prismatic table (720) each extend toward the top mesa (721) to form a graded side (722), wherein each side of the top mesa (721) is connected to at least one corresponding graded side (722).
  5. 5. The cadmium telluride and crystalline silicon stack BIPV assembly according to claim 4, wherein the bottom side of the nano-prisms (720) is 250-350nm and the top mesa (721) side of the nano-prisms (720) is 100-150nm.
  6. 6. The cadmium telluride and crystalline silicon laminate BIPV assembly of claim 1, wherein the base layer (710) is an ultra white float glass sheet.
  7. 7. The cadmium telluride and crystalline silicon stack BIPV assembly of claim 1, wherein the surface of the nano-prismatic mesa (720) is vapor deposited with an anti-reflective film having a thickness of 80-100nm, and a passivation layer (400) is disposed between the crystalline silicon die layer (300) and the cadmium telluride die layer (500).
  8. 8. The cadmium telluride and crystalline silicon stacked BIPV assembly of claim 1, wherein the front sheet (700) is prepared by a process comprising: the base layer (710) is pretreated, wherein the base layer (710) is coated with ultraviolet curing resin after ultrasonic cleaning; imprinting, namely imprinting the ultraviolet curing resin by using a nano imprinting template to form a plurality of nano prismatic tables (720) of a uniform array by the ultraviolet curing resin; And (3) curing and demolding, namely curing the nano prismatic table (720) through ultraviolet light irradiation, and then demolding at normal temperature.
  9. 9. The cadmium telluride and crystalline silicon stacked BIPV assembly according to claim 2, wherein the cadmium telluride chip layer (500) is 0.8-1 μm thick.
  10. 10. The cadmium telluride and crystalline silicon laminated BIPV assembly according to claim 2, wherein the particle size of the nano titanium dioxide particles is 20-30nm, the particle size of the nano titanium dioxide particles is coated with an Al 2 O 3 film, the mass ratio of each component of the modified PVB layer is that PVB resin with the polymerization degree of 1700-2000 and the hydroxyl content of 12-14% is 92-95%, the mass ratio of the nano titanium dioxide particles is 2-3%, the mass ratio of the ultraviolet absorber is 1.5-2%, and the mass ratio of the antioxidant is 1-1.5%.

Description

Cadmium telluride and crystalline silicon stacked BIPV assembly Technical Field The invention relates to the technical field of photovoltaic building integration, in particular to a cadmium telluride and crystalline silicon laminated BIPV component. Background BIPV products, i.e., integrated photovoltaic building products, are used as composite products with both building envelope and energy supply capabilities, and are required to meet multiple requirements of building performance (such as mechanical strength and weather resistance), building appearance aesthetics and photovoltaic performance. In order to improve the power generation efficiency of the BIPV product, in the prior art, the BIPV product adopts a laminated structure of cadmium telluride (CdTe) and a crystalline silicon chip, wherein a packaging layer and a front plate are sequentially arranged on one side of the cadmium telluride chip layer, which is away from the crystalline silicon chip layer, and a packaging layer and a back plate are sequentially arranged on one side of the crystalline silicon chip, which is away from the cadmium telluride chip layer. However, the front plate of BIPV products mostly adopts common super white glass, the light capture of the front plate relies on the simple diffuse reflection principle, and according to the classical light trap theory, the absorption enhancement factors of the structure have the physical limit of 4n2/sin2 theta, and can not form high-efficiency capture on full-band sunlight, namely, the short wave part of 380-650nm is easy to be lost due to the reflection of the front plate, and the long wave part of 650-1100nm is difficult to be absorbed by the crystalline silicon layer due to insufficient penetration depth. In order to meet the aesthetic design of the building appearance, most BIPV products are provided with color schemes such as colored glaze, coating and the like on a front plate of the product, so that light can not enter cadmium telluride and a crystalline silicon layer, and the power generation efficiency of the BIPV products is greatly influenced. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the cadmium telluride and crystalline silicon laminated BIPV component, wherein a plurality of nano prismatic tables uniformly arrayed on the front plate form nano light traps, the physical limit of traditional light trapping is broken through, the efficient trapping of short-wave and long-wave full-wave sunlight is realized, and the power generation efficiency loss caused by insufficient light reflection and penetration is reduced. According to the embodiment of the invention, the cadmium telluride and crystalline silicon laminated BIPV assembly comprises a back plate, a first packaging layer, a crystalline silicon chip layer, a cadmium telluride chip layer, a second packaging layer and a front plate which are sequentially overlapped, wherein the front plate comprises a base layer, the base layer is arranged on one side surface of the second packaging layer, which is far away from the cadmium telluride chip layer, the visible light transmittance of the base layer is more than or equal to 92%, a plurality of nano-prisms are uniformly arrayed on one side surface of the base layer, which is far away from the second packaging layer, the bottom ends of the nano-prisms are larger than the top ends of the nano-prisms, the bottom ends of the nano-prisms are close to the base layer, the top ends of the nano-prisms are provided with top table tops which are arranged side by side with the base layer, and the bottom end edge of each nano-prism is connected with the bottom end edge of the corresponding nano-prisms around so as to form nano-light traps between the nano-prisms. According to some embodiments of the invention, the second encapsulant layer is a modified PVB layer modified with nano-titania particles, an ultraviolet absorber, an antioxidant. According to some embodiments of the invention, the arrangement interval between two adjacent nano-prisms is 300-500nm, and the height of the nano-prisms and the depth of the nano-optical traps are 200-300nm. According to some embodiments of the invention, the bottom end profile of the nano-prismatic table is regular hexagon, the top surface profile of the nano-prismatic table is regular triangle, and six sides of the bottom end of the nano-prismatic table extend towards the top surface to form gradual change sides, wherein each side of the top surface is connected with at least one corresponding gradual change side. According to some embodiments of the invention, the bottom side of the nano-prismatic table is 250-350nm, and the top side of the nano-prismatic table is 100-150nm. According to some embodiments of the invention, the substrate is an ultra-white float glass sheet. According to some embodiments of the invention, the surface of the nano-p