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CN-122028602-A - Four-terminal perovskite-crystalline silicon laminated cell assembly and preparation method and application thereof

CN122028602ACN 122028602 ACN122028602 ACN 122028602ACN-122028602-A

Abstract

The invention provides a four-terminal perovskite-crystalline silicon laminated cell assembly, and a preparation method and application thereof. The perovskite-crystalline silicon laminated cell assembly sequentially comprises front conductive glass, a perovskite top cell, a first adhesive film layer, an insulating material layer, a second adhesive film layer, a crystalline silicon bottom cell, a third adhesive film layer and back glass along the incident light direction, wherein the crystalline silicon bottom cell is a back contact cell, the back contact cell and the perovskite top cell face opposite to each other, and the front face of a no-grid line of the back contact cell faces to the back glass. The back contact battery is used as the crystalline silicon bottom battery, the front surface of the crystalline silicon bottom battery, which is uniform in color and free of shielding by the metal grid lines, faces the back surface of the assembly, so that the back homogenization aesthetic effect of the laminated assembly is remarkably improved, the effective utilization of back light is enhanced, the power generation capacity of the laminated battery assembly is improved, and the insulation safety between the perovskite top battery and the crystalline silicon bottom battery is enhanced by introducing the insulating material layer.

Inventors

  • Request for anonymity
  • Request for anonymity

Assignees

  • 仁烁光能(苏州)有限公司
  • 仁烁光能(常熟)有限公司
  • 江苏仁烁光伏技术有限公司

Dates

Publication Date
20260512
Application Date
20260209

Claims (10)

  1. 1. The perovskite-crystal silicon laminated cell assembly is characterized by sequentially comprising front conductive glass, a perovskite top cell, a first adhesive film layer, an insulating material layer, a second adhesive film layer, a crystal silicon bottom cell, a third adhesive film layer and back glass along the incident light direction; The back contact battery and the perovskite top battery face opposite to each other, and the front surface of the no-grid line of the back contact battery faces the back glass.
  2. 2. The four-terminal perovskite-crystalline silicon laminate cell assembly as claimed in claim 1, wherein the perovskite top cell comprises a hole transport layer, a perovskite absorption layer, an electron transport layer and a transparent electrode layer in this order along the direction of incident light; And/or, the perovskite top battery is provided with a drainage bar and a bus bar, the drainage bar is used for converging and leading out the current of the perovskite top battery, and the bus bar is used for converging and outputting the current led out by the drainage bar.
  3. 3. The four-terminal perovskite-crystalline silicon laminate cell assembly as claimed in claim 1 or 2, wherein the insulating material of the insulating material layer comprises an inorganic glass material or a PET material; And/or the thickness of the insulating material layer is 75 μm-3.5mm.
  4. 4. A four-terminal perovskite-crystalline silicon laminate cell assembly according to any one of claims 1 to 3, wherein the insulating material layer has a thickness of 1 to 3.5mm when the insulating material of the insulating material layer is an inorganic glass material, or When the insulating material of the insulating material layer is PET material, the thickness of the insulating material layer is 75-200 mu m; and/or the insulating material layer is a black insulating layer or a black grid insulating layer.
  5. 5. The four-terminal perovskite-crystalline silicon stacked cell assembly according to any one of claims 1 to 4, wherein the back contact cell comprises a plurality of series-connected crystalline silicon cell strings connected by bus bars to form a parallel circuit and current is drawn through the bus bars.
  6. 6. The four-terminal perovskite-crystalline silicon laminate cell assembly according to any one of claims 1 to 5, wherein the materials of the first, second and third adhesive film layers each independently comprise any one or a combination of at least two of polyolefins, polyesters or olefin copolymers; And/or the thickness of the first adhesive film layer is 0.45-0.7mm; and/or the thickness of the second adhesive film layer is 0.45-0.7mm; and/or the thickness of the third adhesive film layer is 0.45-0.7mm; And/or the four-terminal perovskite-crystalline silicon laminated cell assembly further comprises packaging glue, wherein the packaging glue is arranged between the front conductive glass and the back glass and surrounds the side edges of the perovskite top cell, the first adhesive film layer, the insulating material layer, the second adhesive film layer, the crystalline silicon bottom cell and the third adhesive film layer.
  7. 7. The four-terminal perovskite-crystalline silicon laminated cell assembly according to any one of claims 1 to 6, wherein through holes are respectively arranged at corresponding positions of the first adhesive film layer, the second adhesive film layer and the third adhesive film layer and are used for leading out drainage strips of perovskite top cells or crystalline silicon bottom cells; The back glass is provided with perovskite lead-out holes and crystalline silicon lead-out holes at corresponding positions, and the perovskite lead-out holes and the crystalline silicon lead-out holes are used for leading out drain strips of the perovskite top battery and the crystalline silicon bottom battery and are respectively and independently connected to an external junction box.
  8. 8. A method of making a four-terminal perovskite-crystalline silicon laminate cell assembly as defined in any one of claims 1 to 7, said method comprising the steps of: Preparing a perovskite top cell on the front side conductive glass; preparing a first adhesive film layer, an insulating material layer and a second adhesive film layer on the perovskite top cell; a back contact battery is paved on the second adhesive film layer to serve as a crystalline silicon bottom battery, and the front surface of the no-grid line of the back contact battery faces away from the front surface conductive glass; preparing a third adhesive film layer on the front surface of the grid-free line of the crystalline silicon bottom battery; and covering back plate glass on the third adhesive film layer, and then laminating to obtain the four-terminal perovskite-crystalline silicon laminated cell assembly.
  9. 9. The method of manufacturing according to claim 8, wherein the method of manufacturing the insulating material layer includes any one of a direct deposition method, a chemical vapor deposition method, a magnetron sputtering method, or a screen printing method.
  10. 10. Use of a four-terminal perovskite-crystalline silicon laminate cell assembly as defined in any one of claims 1 to 7 in the photovoltaic field.

Description

Four-terminal perovskite-crystalline silicon laminated cell assembly and preparation method and application thereof Technical Field The invention belongs to the technical field of photovoltaics, and particularly relates to a four-terminal perovskite-crystalline silicon laminated cell assembly, and a preparation method and application thereof. Background Four-terminal perovskite-crystalline silicon stacked cell assemblies are considered as important directions for next-generation high-performance photovoltaic technologies because of their potential for high efficiency and low cost. The perovskite battery has excellent visible light absorption capacity, the crystalline silicon battery has stable output performance in a near infrared region, and the perovskite battery and the crystalline silicon battery have high complementarity in spectral response, so that the perovskite battery is suitable for constructing a high-efficiency laminated structure. Electrically, the four-terminal structure allows the perovskite top battery and the crystal silicon bottom battery to work independently and not interfere with each other, so that the difficulty of process integration is reduced, and the stability and reliability of the whole system are improved. In the four-terminal perovskite-crystalline silicon stacked cell assembly, crystalline silicon cells (such as TOPCon cells and PERC cells) which are commonly used as bottom cells are usually provided with electrode surfaces which are fully covered with metal grid lines on the back surface, and laser grooving, local doping and other treatments are usually required to achieve efficient contact. These process steps and subsequent sintering processes tend to result in poor color uniformity of the back surface of the cell, with significant color differences from sheet to sheet. Therefore, when the assembly is applied to fields with aesthetic requirements, such as a photovoltaic car shed, a building roof, a fence and the like, the assembly can be messy and unattractive in appearance due to the color difference problem of the back of the crystalline silicon battery when being watched from the back of the assembly, and the overall visual effect and design quality of the building and the environment are seriously affected. If the back of the component is covered by black glaze glass to cover the chromatic aberration of the back of the crystalline silicon battery, the cost is increased, and the power generation benefit is affected, because the back of the crystalline silicon battery can not absorb light after the back of the crystalline silicon battery is covered by the black glaze glass, the back battery can not generate power, and the power generation benefit is affected. In addition, the existing crystalline silicon battery has a certain double-sided rate, for example, the double-sided rate of TOPCon batteries is about 75% (namely, the back power of TOPCon batteries is about 75% of the front power under standard test conditions), and the back power generation capacity of the batteries is weak relative to the front. Therefore, how to effectively solve the problems of nonuniform back color, chromatic aberration and the like of the four-terminal perovskite-crystal silicon laminated cell assembly and improve the power generation capacity of the back of the assembly is a technical problem to be solved. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide a four-terminal perovskite-crystal silicon laminated cell assembly, and a preparation method and application thereof. The back contact battery is adopted as the crystalline silicon bottom battery, the front surface which is uniform in color and free of shielding by the metal grid line faces the back surface of the component, so that the excellent optical transmission and absorption characteristics of the back surface of the laminated component are fully utilized while the homogenizing aesthetic effect of the back surface of the laminated component is remarkably improved, the effective utilization of back light is greatly enhanced, the power generation capacity of the back surface of the laminated component is improved, and the whole power generation capacity of the component is improved. In order to achieve the aim of the invention, the invention adopts the following technical scheme: in a first aspect, the invention provides a four-terminal perovskite-crystalline silicon laminated cell assembly, which sequentially comprises front conductive glass, a perovskite top cell, a first adhesive film layer, an insulating material layer, a second adhesive film layer, a crystalline silicon bottom cell, a third adhesive film layer and back glass along the incident light direction. The back contact battery and the perovskite top battery face opposite to each other, and the front surface of the no-grid line of the back contact battery faces the back glass. The back contact battery is adopted as the crystallin