Flexible perovskite photovoltaic cell

Abstract

The utility model relates to the technical field of photovoltaic cells, in particular to a flexible perovskite photovoltaic cell which comprises a cell, the cell is composed of a transparent light-emitting layer, a conductive layer, an absorption layer, a back reflection layer, a flexible substrate layer and an elastic sheet, the transparent light-emitting layer is arranged at the top of the cell, the conductive layer is arranged at the bottom of the transparent light-emitting layer, and the absorption layer is arranged on the back reflection layer. The absorption layer is arranged at the bottom of the conductive layer, the flexible substrate layer is arranged at the bottom of the battery, the elastic sheet is arranged on the surface of the battery, the transparent light-emitting layer is a thin film formed by indium tin oxide and silver-based nano patterns, the indium tin oxide and the silver-based nano patterns are woven in a staggered mode, the conductive layer is composed of zinc oxide and a conductive polymer, and the transparent light-emitting layer is a transparent light-emitting layer. Compared with a conventional flexible perovskite photovoltaic cell, the flexible perovskite photovoltaic cell provided by the utility model has the advantages that through the design of the flexible substrate layer, the flexibility of the photovoltaic cell can be rapidly and greatly improved, and the overall practicability is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic cell technology, specifically to a flexible perovskite photovoltaic cell. Background Technology

[0002] Perovskite solar cells have made rapid progress in photoelectric conversion efficiency in recent years due to their simple structure, low-temperature fabrication, excellent bipolar carrier properties, high extinction coefficient, and suitable band gap.

[0003] However, most traditional perovskite solar cells use rigid substrates, which limits their application scenarios.

[0004] Therefore, it is particularly important to improve existing flexible perovskite photovoltaic cells and design a new type of flexible perovskite photovoltaic cell to solve the above-mentioned technical defects and improve the overall practicality of flexible perovskite photovoltaic cells. Utility Model Content

[0005] The purpose of this invention is to provide a flexible perovskite photovoltaic cell. Through the overall design, the cell can be formed into a planar structure using elastic sheets, and it can also be bent longitudinally, thereby adapting to various shapes and sizes of application scenarios to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A flexible perovskite photovoltaic cell includes a cell comprising a transparent light-emitting layer, a conductive layer, an absorption layer, a back-reflective layer, a flexible substrate layer, and an elastic sheet. The transparent light-emitting layer is disposed at the top of the cell, the conductive layer is disposed at the bottom of the transparent light-emitting layer, the absorption layer is disposed at the bottom of the conductive layer, the flexible substrate layer is disposed at the bottom of the cell, and the elastic sheet is disposed on the surface of the cell.

[0008] As a preferred embodiment of this utility model, the transparent light-emitting layer is composed of a thin film of indium tin oxide and silver-based nanopatterns, which are interwoven.

[0009] As a preferred embodiment of this utility model, the conductive layer is composed of zinc oxide and a conductive polymer. The surface of the zinc oxide is coated with a titanium-winged conductive film. Multiple sets of carbon nanotubes are provided in the middle of the conductive layer. The multiple sets of carbon nanotubes are distributed at equal intervals and have an interlaced structure design.

[0010] As a preferred embodiment of this utility model, the conductive polymer is composed of polyaniline material, and the conductive polymer contains inorganic nanoparticles.

[0011] As a preferred embodiment of this utility model, the absorption layer is composed of amorphous silicon, and the amorphous silicon has three pn junction absorption layers, the pn junction absorption layers are provided in three groups, and there are gaps between the three groups of pn junction absorption layers.

[0012] As a preferred embodiment of this utility model, the back reflective layer is composed of a silver-zinc alloy and zinc oxide, with the silver-zinc alloy disposed at the top and bottom of the back reflective layer, and the zinc oxide disposed between the two sets of silver-zinc alloys.

[0013] As a preferred embodiment of this utility model, the flexible substrate layer is composed of polyimide and polyethylene terephthalate flexible materials, and the elastic sheet is composed of an adhesive polymer, which is made of ethylene dioxythiophene material.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, the elastic sheet can form a planar structure for the battery and also achieve longitudinal bending, thereby adapting to various application scenarios with different shapes and sizes. At the same time, the imide has high strength and toughness, can withstand large mechanical stress and impact, and is not prone to breakage or damage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the battery structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the overall separation of this utility model.

[0019] In the diagram: 1. Battery; 2. Transparent light-emitting layer; 3. Conductive layer; 4. Absorption layer; 5. Back reflection layer; 6. Flexible substrate layer; 7. Elastic sheet. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Example:

[0022] Please see Figures 1-3 This utility model provides a technical solution:

[0023] A flexible perovskite photovoltaic cell includes a cell 1. The cell 1 comprises a transparent light-emitting layer 2, a conductive layer 3, an absorption layer 4, a back reflection layer 5, a flexible substrate layer 6, and an elastic sheet 7. The transparent light-emitting layer 2 is disposed on the top of the cell 1, the conductive layer 3 is disposed on the bottom of the transparent light-emitting layer 2, the absorption layer 4 is disposed on the bottom of the conductive layer 3, the flexible substrate layer 6 is disposed on the bottom of the cell 1, and the elastic sheet 7 is disposed on the surface of the cell 1.

[0024] Furthermore, in this embodiment, the transparent light-emitting layer 2 is composed of a thin film made of indium tin oxide and silver-based nanopatterns. The indium tin oxide and silver-based nanopatterns are interwoven. Indium tin oxide is one of the most commonly used transparent conductive materials, with excellent conductivity and transparency. Silver, as a metal with good conductivity, can also be used to make a transparent conductive layer. The transparent conductive electrode film is manufactured on a large scale through silver-based nanopatterns, which is not easily broken and is more resistant to chemical corrosion.

[0025] Furthermore, in this embodiment, the conductive layer 3 is composed of zinc oxide and a conductive polymer. The surface of the zinc oxide is coated with a titanium-winged conductive film. Multiple groups of carbon nanotubes are arranged in the middle of the conductive layer 3. The multiple groups of carbon nanotubes are distributed at equal intervals and have an interlaced structure design. The conductive polymer is composed of polyaniline and contains inorganic nanoparticles. The titanium-winged conductive film is an ultra-thin metal conductive film with a strong technical reserve in the field of flexible photovoltaics. It has low sheet resistance, high transmittance, low haze, and good stability. It also has thermal shielding and good flexibility. Carbon nanotubes have high tensile strength and elastic modulus. They have low density but high strength. At the same time, they also have good flexibility and are not easy to break. In addition, carbon nanotubes have extremely high electrical conductivity. Electrons are transported very quickly inside them with almost no energy loss. This excellent conductivity makes carbon nanotubes a key auxiliary material for improving the energy density of battery 1, realizing fast charging and discharging, and improving cycle life. In addition, carbon nanotubes can also be used as conductive agents for integrated circuits, greatly improving circuit performance. Carbon nanotubes also have very high thermal conductivity.

[0026] Furthermore, in this embodiment, the absorption layer 4 is composed of amorphous silicon, which contains three pn junction absorption layers. There are three sets of pn junction absorption layers, and gaps are provided between the three sets of pn junction absorption layers, which helps to reduce the cost of raw materials. By forming three pn junction absorption layers with different band gaps, the conversion efficiency and stability can be improved. The stable conversion efficiency can reach 8.0%-8.5%. At the same time, the three pn junction absorption layers with different band gaps absorb blue light, green light, red light, and infrared light respectively, and the light absorption efficiency is improved through the back reflection layer.

[0027] Furthermore, in this embodiment, the back reflective layer 5 is composed of a silver-zinc alloy and zinc oxide. The silver-zinc alloy is disposed at the top and bottom of the back reflective layer 5, and the zinc oxide is disposed between the two sets of silver-zinc alloys. The silver-zinc alloy can change the interface roughness by adjusting the doping composition and morphology, thereby reducing light reflection and enhancing light absorption. At the same time, the silver-zinc alloy encapsulates the zinc oxide, which has excellent conductivity and can significantly improve the conductivity of the silver-zinc alloy, giving it better electrical contact performance. The encapsulation of zinc oxide can also enhance the anti-welding performance, arc erosion resistance and anti-material transfer ability of the silver-zinc alloy, thereby improving its service life and reliability.

[0028] Furthermore, in this embodiment, the flexible substrate layer 6 is composed of a flexible polyimide material, and the elastic sheet 7 is composed of an adhesive polymer. The adhesive polymer is made of ethylene dioxythiophene. The elastic sheet 7 can make the battery 1 form a planar structure and can also be bent longitudinally, thereby adapting to various application scenarios of different shapes and sizes. At the same time, the imide has high strength and toughness, can withstand large mechanical stress and impact, and is not easy to break or break.

[0029] In this embodiment, the specific implementation scenario is as follows: Indium tin oxide (ITO) is one of the most commonly used transparent conductive materials, possessing excellent conductivity and transparency. Silver, as a metal with good conductivity, can also be used to fabricate transparent conductive layers. Transparent conductive electrode films are manufactured on a large scale using silver-based nanopatterns, making them less brittle and more resistant to chemical corrosion. Titanium-coated conductive films are ultra-thin metallic conductive films with substantial technological reserves in the field of flexible photovoltaics. They possess low sheet resistance, high transmittance, low haze, and good stability, as well as thermal shielding and good flexibility. Carbon nanotubes have high tensile strength and elastic modulus, low density but high strength, and excellent flexibility, making them less prone to breakage. Furthermore, carbon nanotubes have extremely high electrical conductivity, allowing for very rapid electron transport with almost no energy loss. This excellent conductivity makes carbon nanotubes a key auxiliary material for improving battery energy density, achieving fast charging and discharging, and enhancing cycle life. In addition, carbon nanotubes can also serve as conductive agents in integrated circuits, significantly improving circuit performance. The thermal conductivity is also very high. By forming three pn junction absorption layers with different band gaps, the conversion efficiency and stability are improved. The stable conversion efficiency can reach 8.0%-8.5%. At the same time, the three pn junction absorption layers with different band gaps absorb blue light, green light, red light, and infrared light respectively. The light absorption efficiency is improved by the back reflection layer. The silver-zinc alloy can change the interface roughness by adjusting the doping composition and morphology, thereby reducing light reflection and enhancing light absorption. At the same time, the silver-zinc alloy is coated with zinc oxide, which has excellent conductivity and can significantly improve the conductivity of the silver-zinc alloy, giving it better electrical contact performance. The zinc oxide coating can also enhance the silver-zinc alloy's resistance to welding, resistance to arc erosion, and resistance to material transfer, thereby improving its service life and reliability. The elastic sheet 7 can make the battery 1 form a planar structure and can also achieve longitudinal bending, thereby adapting to various shapes and sizes of application scenarios. Meanwhile, the imide has high strength and toughness, can withstand large mechanical stress and impact, and is not easy to break or break.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flexible perovskite photovoltaic cell, comprising a cell (1), characterized in that: The battery (1) comprises a transparent light-emitting layer (2), a conductive layer (3), an absorption layer (4), a back reflection layer (5), a flexible substrate layer (6), and an elastic sheet (7). The transparent light-emitting layer (2) is disposed on the top of the battery (1), the conductive layer (3) is disposed on the bottom of the transparent light-emitting layer (2), the absorption layer (4) is disposed on the bottom of the conductive layer (3), the flexible substrate layer (6) is disposed on the bottom of the battery (1), and the elastic sheet (7) is disposed on the surface of the battery (1).

2. The flexible perovskite photovoltaic cell according to claim 1, characterized in that: The transparent light-emitting layer (2) is a thin film composed of indium tin oxide and silver-based nanopatterns, which are interwoven.

3. A flexible perovskite photovoltaic cell according to claim 1, characterized in that: The conductive layer (3) is composed of zinc oxide and conductive polymer. The surface of the zinc oxide is coated with a titanium wing conductive film. Multiple sets of carbon nanotubes are provided in the middle of the conductive layer (3). The multiple sets of carbon nanotubes are distributed at equal intervals and the carbon nanotubes are designed in an interlaced structure.

4. A flexible perovskite photovoltaic cell according to claim 3, characterized in that: The conductive polymer is composed of polyaniline material and contains inorganic nanoparticles.

5. A flexible perovskite photovoltaic cell according to claim 1, characterized in that: The absorption layer (4) is composed of amorphous silicon, and the amorphous silicon has three pn junction absorption layers. The pn junction absorption layers are provided in three groups, and there are gaps between the three groups of pn junction absorption layers.

6. A flexible perovskite photovoltaic cell according to claim 1, characterized in that: The back reflective layer (5) is composed of a silver-zinc alloy and zinc oxide. The silver-zinc alloy is disposed at the top and bottom of the back reflective layer (5), and the zinc oxide is disposed between the two sets of silver-zinc alloy.

7. A flexible perovskite photovoltaic cell according to claim 1, characterized in that: The flexible substrate layer (6) is composed of polyimide (PI) and polyethylene terephthalate (PET) flexible materials, and the elastic sheet (7) is composed of an adhesive polymer, which is made of ethylene dioxythiophene material.

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