A double-sided assembly graphene oxide solar panel

Abstract

The application discloses a double-sided assembly graphene oxide solar cell panel, which is a multilayer laminated structure and comprises, from bottom to top, an aluminum sheet net, a tempered glass substrate, a lower EPE adhesive film, a crystalline silicon cell piece, a graphene oxide film layer, an upper EVA adhesive film and a tempered glass panel; the aluminum sheet net is of a rhombic large-aperture structure; the lower EPE adhesive film is of a co-extrusion structure of EVA / POE / EVA, and the outer contact surfaces are all EVA adhesive films; the graphene oxide film layer is doped with carbon nanotubes; the upper EVA adhesive film layer is covered with a layer of superfine mica powder filler, and an upper surface is formed with a layer of polyperfluoroethylene propylene film. The solar cell panel of the application adopts a new material, has excellent physical and chemical properties, and has the advantages of uniform conductivity, high light energy conversion rate, high utilization rate and the like.

Description

Technical Field

[0001] This invention belongs to the field of solar panel technology and relates to a bifacial graphene oxide solar panel. Background Technology

[0002] With the dwindling resources of Earth's non-renewable resources, energy depletion and environmental pollution are pressing issues, making the development and utilization of new energy sources an urgent problem to be solved. Solar energy is both a primary and a renewable energy source. It is abundant; the solar radiation reaching the Earth's surface annually is equivalent to approximately 130 trillion tons of coal, making it the largest exploitable energy source in the world today. It is one of the cleanest energy sources, available free of charge, requiring no transportation, and causing no environmental pollution. Solar power generation is an emerging renewable energy source, offering a new approach to resource utilization. Currently, the use of solar energy is not widespread, and solar power generation still faces challenges such as high costs and low conversion efficiency, requiring continuous research and innovation to provide technical support for the widespread application of solar cells.

[0003] Solar cells are devices that directly convert light energy into electrical energy through the photoelectric effect or photochemical effect. Currently, solar panels on the market are classified into silicon-based, compound-based, and organic-based types based on the materials used. Silicon-based solar panels have relatively mature technology and mostly use monocrystalline or polycrystalline silicon cells. Polycrystalline silicon is cheaper than monocrystalline silicon, but its light conversion efficiency is lower. EVA thin films are often used to bond tempered glass and the power generation unit between the layers of the solar panel. The quality of the transparent EVA material directly affects the lifespan of the module. EVA exposed to air is prone to aging and yellowing, thus affecting the module's light transmittance. Furthermore, insufficient bonding strength between EVA and tempered glass can cause premature aging of the EVA, affecting the module's lifespan. Summary of the Invention

[0004] To address the problems of low light energy utilization and short lifespan of current silicon-based solar panels, this invention proposes a bifacial graphene oxide solar panel.

[0005] This invention discloses a bifacial graphene oxide solar panel, wherein the solar panel has a multi-layered structure, comprising, from bottom to top, an aluminum mesh, a tempered glass substrate, a lower EPE film, a crystalline silicon solar cell, a graphene oxide film, an upper EVA film, and a tempered glass panel; the aluminum mesh has a diamond-shaped large-aperture structure; the lower EPE film has a co-extruded structure of EVA / POE / EVA, with all outer contact surfaces being EVA film; the graphene oxide film is doped with carbon nanotubes; the upper EVA film is coated with an ultrafine mica powder filler, and a polytetrafluoroethylene propylene film is formed on its upper surface.

[0006] Furthermore, the aluminum plate has diamond-shaped holes with a diameter of 10×20mm.

[0007] Furthermore, the thickness of the tempered glass panel is 4-6 mm, and the thickness of the tempered glass substrate is 6-8 mm.

[0008] Furthermore, the lower EPE film includes a first EVA film, a POE film, and a second EVA film arranged sequentially. The thickness of the first EVA film and the second EVA film is 1-3 mm, and the thickness of the POE film in the middle is 3-5 mm.

[0009] Furthermore, the graphene oxide film is doped with carbon nanotubes with a diameter of 1 nm, and the doping ratio of the two is 1:0.2.

[0010] Furthermore, the thickness of the upper EVA film is 6-8 mm.

[0011] Furthermore, the average particle size of the ultrafine mica powder filler uniformly coated between the upper EVA films is 10 μm, and the content of SiO2 in the ultrafine mica powder is 49% and the content of Al2O3 is 30%.

[0012] Furthermore, the thickness of the poly(fluoroethylene propylene) film is 0.02 to 0.06 mm.

[0013] A bifacial graphene oxide solar panel of the present invention has at least the following features:

[0014] Beneficial effects:

[0015] (1) The solar panel of the present invention is a bifacial module with a tempered glass substrate on the bottom layer and covered by an aluminum mesh. The aluminum mesh is rust-free, has a strong load-bearing capacity, and is aesthetically pleasing. It also allows backscattered and reflected light to enter the interior of the solar panel through the gaps in the mesh that are not covered by the aluminum mesh. This ensures that the solar panel is sturdy, durable, and aesthetically pleasing while improving the overall power generation efficiency of the photovoltaic module.

[0016] (2) The present invention adds a layer of graphene oxide structure on top of the crystalline silicon solar cell to solve the problem that the epoxy groups, hydroxyl groups and other groups of graphene oxide destroy the original spline structure of the graphene sheet. 2 To address the issue of conjugated structures becoming insulating materials, 1 nm diameter carbon nanotubes (SWCNTs) were doped into graphene oxide. This resulted in a graphene oxide film with uniform conductivity without significantly disrupting the film's uniformity. Graphene oxide, as a graphene-based material, boasts a simple synthesis method, high scalability, and low cost. When used in solar panels, it exhibits high transparency and enhanced charge collection capabilities.

[0017] (3) The lower EPE film of the present invention is a co-extruded structure of EVA / POE / EVA. The middle POE film has excellent anti-permeation and anti-corrosion aging ability and mainly plays a barrier role. The outer contact surface is all EVA film, which reduces the probability of mis-extrusion and lowers the cost.

[0018] (4) The upper layer of the present invention uses an EVA film covered with a polytetrafluoroethylene propylene film. Polytetrafluoroethylene propylene has good high temperature resistance and corrosion resistance, which can protect the EVA film. It also has good adhesion to glass, which can effectively improve the problem of insufficient bonding strength between EVA and tempered glass, causing EVA to age prematurely and affecting the life of the component.

[0019] (5) The present invention has an ultrafine mica powder filler between the EVA film layers, which can improve the mechanical strength, toughness, adhesion, anti-aging performance and corrosion resistance of the EVA film. Moreover, its thermal expansion coefficient is small, and its volume change is small when it is exposed to high temperature for a long time, thus ensuring the original shape of the EVA film. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a bifacial graphene oxide solar cell panel according to the present invention. Detailed Implementation

[0021] The invention will be further described below with reference to the illustrations.

[0022] like Figure 1 As shown, a bifacial graphene oxide solar panel of the present invention has a multi-layered structure, including, from bottom to top, an aluminum mesh 10, a tempered glass substrate 9, a lower EPE film, a crystalline silicon solar cell 6, a graphene oxide film layer 5, an upper EVA film layer 4, and a tempered glass panel 1. The lower EPE film is a co-extruded structure of EVA / POE / EVA, with all outer contact surfaces being EVA film. The graphene oxide film layer 5 is doped with carbon nanotubes; the upper EVA film layer 4 has an interlayer of ultrafine mica powder filler 3, and a layer of perfluoroethylene propylene film 2 is formed on its upper surface.

[0023] In specific implementation, the aluminum mesh 10 has a large-aperture diamond-shaped structure with diamond-shaped holes and an aperture of 10×20mm. The thickness of the tempered glass panel is 4-6mm, and the thickness of the tempered glass substrate is 6-8mm. The lower EPE film includes a first EVA film, a POE film, and a second EVA film arranged sequentially. The thickness of the first and second EVA films is 1-3mm, and the thickness of the intermediate POE film is 3-5mm. The thickness of the upper EVA film is 6-8mm. The ultrafine mica powder filler uniformly coated between the upper EVA films has an average particle size of 10μm, and the content of SiO2 in the ultrafine mica powder is 49%, and the content of Al2O3 is 30%. The thickness of the polytetrafluoroethylene propylene film is 0.02-0.06mm.

[0024] Example

[0025] In this embodiment, the substrate of the solar panel is a tempered glass substrate 9 with a thickness of 8mm, on which a 3mm thick diamond-shaped perforated aluminum mesh 10 is laid. The crystalline silicon solar cell 6 is bonded and fixed to the mesh via an EPE film. The EPE film has a co-extruded structure of EVA / POE / EVA, with the first EVA film 71 and the second EVA film 72 having a thickness of 3mm, and the intermediate POE film 8 having a thickness of 5mm.

[0026] In this embodiment, the graphene oxide film 5 is bonded to the tempered glass panel 1 via an 8mm thick upper EVA film 4. The upper surface of the upper EVA film 4 is coated with an ultrafine mica powder coating 3. The average particle size of the mica powder in the ultrafine mica powder coating is 10μm, and the mica powder contains approximately 49% SiO2 and approximately 30% Al2O3. A 0.06mm thick perfluoroethylene propylene film 2 is then applied over the ultrafine mica powder coating 3. The tempered glass panel 1 is 6mm thick.

[0027] In this embodiment, a graphene oxide film 5 doped with carbon nanotubes is also disposed on the crystalline silicon solar cell 6, with a doping ratio of graphene oxide to carbon nanotubes of GO:SWCNT = 1:0.2. In this embodiment, the graphene oxide film 5 is bonded to the tempered glass panel 1 through an 8mm thick upper EVA film 4. The surface of the upper EVA film 4 is covered with a 0.06mm thick perfluoroethylene propylene film 2, and an ultrafine mica powder filler 3 is uniformly coated between the layers of the upper EVA film 4. In this embodiment, the solar panel is a 6mm thick tempered glass panel.

[0028] Existing solar panels utilize graphene films, which exhibit high transparency, strong conductivity, rigidity, and stable performance, and are not corroded or degraded in air. However, their effectiveness in collecting the current generated within the solar cell is relatively poor. This invention considers introducing oxygen into the carbon mesh to increase the transparency and charge collection capacity of the resulting graphene oxide. Graphene oxide is used as a graphene-based material in this invention, and its synthesis method is simple, scalable, and low-cost. However, the epoxy and hydroxyl groups on graphene oxide disrupt the original sp2 conjugated structure of the graphene sheets, ultimately determining that graphene oxide is an insulating material. This invention uses 1 nm diameter carbon nanotubes (SWCNTs) to dope graphene oxide, obtaining a graphene oxide film with uniform conductivity without significantly compromising the uniformity of the graphene oxide film. This film, used in solar panels, exhibits high transparency and enhanced charge collection capacity.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the ideas of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bifacial graphene oxide solar panel, characterized in that, The solar panel has a multi-layered structure, including, from bottom to top, an aluminum mesh, a tempered glass substrate, a lower EPE film, a crystalline silicon cell, a graphene oxide film, an upper EVA film, and a tempered glass panel; the aluminum mesh has a diamond-shaped large-aperture structure; the lower EPE film is a co-extruded structure of EVA / POE / EVA, with all outer contact surfaces being EVA film; the graphene oxide film is doped with carbon nanotubes; the upper EVA film is coated with a layer of ultrafine mica powder filler, and a layer of perfluoroethylene propylene film is formed on its upper surface; The ultrafine mica powder filler uniformly coated between the upper EVA films has an average particle size of 10 μm, and the ultrafine mica powder contains 49% SiO2 and 30% Al2O3.

2. The bifacial graphene oxide solar panel according to claim 1, characterized in that, The aluminum plate has diamond-shaped holes with a diameter of 10×20mm.

3. The bifacial graphene oxide solar panel according to claim 1, characterized in that, The thickness of the tempered glass panel is 4-6 mm, and the thickness of the tempered glass substrate is 6-8 mm.

4. The bifacial graphene oxide solar panel according to claim 1, characterized in that, The lower EPE film includes a first EVA film, a POE film and a second EVA film arranged in sequence. The thickness of the first EVA film and the second EVA film is 1 to 3 mm, and the thickness of the POE film in the middle is 3 to 5 mm.

5. The bifacial graphene oxide solar panel according to claim 1, characterized in that, The graphene oxide film is doped with carbon nanotubes with a diameter of 1 nm, and the doping ratio is 1:0.

2.

6. The bifacial graphene oxide solar panel according to claim 1, characterized in that, The thickness of the upper EVA film is 6-8 mm.

7. The bifacial graphene oxide solar panel according to claim 1, characterized in that, The thickness of the poly(fluoroethylene propylene) film is 0.02 to 0.06 mm.

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