CN118317618A - A perovskite solar cell packaging structure and packaging method for improving light utilization efficiency - Google Patents

A perovskite solar cell packaging structure and packaging method for improving light utilization efficiency Download PDF

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Publication number
CN118317618A
CN118317618A CN202410431387.XA CN202410431387A CN118317618A CN 118317618 A CN118317618 A CN 118317618A CN 202410431387 A CN202410431387 A CN 202410431387A CN 118317618 A CN118317618 A CN 118317618A
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solar cell
perovskite solar
quantum dots
ultraviolet
packaging
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杨培志
杨雯
杨启鸣
张云博
孟广昊
王琴
章维格
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Yunnan Normal University
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Yunnan Normal University
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/80—Constructional details
    • H10K30/88—Passivation; Containers; Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
    • H10F19/80—Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells
    • H10F19/804—Materials of encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F71/00—Manufacture or treatment of devices covered by this subclass
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F77/00—Constructional details of devices covered by this subclass
    • H10F77/40—Optical elements or arrangements
    • H10F77/42—Optical elements or arrangements directly associated or integrated with photovoltaic cells, e.g. light-reflecting means or light-concentrating means
    • H10F77/45—Wavelength conversion means, e.g. by using luminescent material, fluorescent concentrators or up-conversion arrangements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Photovoltaic Devices (AREA)

Abstract

The application relates to the technical field of solar cell packaging, in particular to a perovskite solar cell packaging structure and a perovskite solar cell packaging method for improving light utilization rate. The packaging structure comprises a perovskite solar cell, an ultraviolet conversion layer and a hydrophobic layer from bottom to top. The ultraviolet conversion layer comprises an encapsulation adhesive film and quantum dots, the quantum dots are doped in the encapsulation adhesive film, and the quantum dots convert ultraviolet light into visible light. The surface of the hydrophobic layer has hydrophobic properties. The quantum dots absorb ultraviolet rays and convert the ultraviolet rays into a visible light frequency band with higher absorption efficiency of the perovskite solar cell through the fluorescence generation process of the quantum dots; this conversion of energy increases the proportion of photons in the spectral range of the solar cell, thereby increasing the utilization of light energy. In addition, by arranging the ultraviolet conversion layer, ultraviolet light directly reaching the perovskite material is reduced, damage of ultraviolet light to the perovskite solar cell is reduced, and the service life of the perovskite solar cell is prolonged.

Description

Perovskite solar cell packaging structure and method for improving light utilization rate
Technical Field
The application relates to the technical field of solar cell packaging, in particular to a perovskite solar cell packaging structure and a perovskite solar cell packaging method for improving light utilization rate.
Background
The ultraviolet energy is approximately 5% to 10% of the total radiant energy of the sun. The perovskite material has very limited photoelectric conversion to visible light, but absorption of ultraviolet light causes degradation of the perovskite material, thereby affecting the stability and lifetime of the perovskite solar cell.
In particular, ultraviolet light has a relatively high energy, and is capable of initiating a series of chemical and physical processes that are detrimental to perovskite materials: the high energy of ultraviolet rays breaks chemical bonds in the perovskite material, so that the material structure is directly damaged, defects such as ion displacement and hole accumulation are generated in the perovskite material, and the electronic property and stability of the material are affected; perovskite materials absorb ultraviolet light, converting the ultraviolet energy into thermal energy, resulting in an increase in the temperature of the material. The high temperature accelerates unstable reactions of the perovskite material, such as decomposition or phase change of the perovskite material, and further damages the overall structure of the perovskite material; the ultraviolet irradiation causes ion migration in the perovskite material, thereby causing lattice defects, further reducing the stability of the perovskite material.
From the above analysis, it can be seen that, for perovskite solar cells, ultraviolet light in solar radiation not only wastes solar light utilization, but also destroys the stability of the perovskite.
In order to solve the problems, researchers adopt a multi-structure design, and combine perovskite solar cells with other types of solar cells (such as silicon or copper indium gallium selenide) to form serial or parallel multi-structure solar cells (references: recent Progress in Perovskite Tandem Solar Cells, vol.13, pp.1886,2023; research progress towards perovskite/crystalline silicon laminated solar cell technology with efficiency of more than 30%, physical school report, volume 72, 5 th, 2023; research progress of high-efficiency double-junction perovskite laminated solar cells, composite material school report, volume 40, 2 nd, 2023). In this design, the cell layers of each material can be optimized to absorb different parts of the solar spectrum: one layer is specifically uv absorbing; the other layer is focused on visible or near infrared. Although the multilayer structure design solves the ultraviolet problem to a certain extent, the multilayer structure design is complex, researchers need to precisely control the thickness, composition and interface of each layer, and the cost is increased; in addition, the different material layers have different thermal expansion coefficients, and stress accumulation is easy to occur between the different material layers when the temperature is changed, so that the long-term stability and the performance of the battery are affected.
Therefore, it is important to search for other technical paths for eliminating the ultraviolet problem.
Disclosure of Invention
In order to solve the problems, the invention provides a perovskite solar cell packaging structure for improving the light utilization rate, which comprises a perovskite solar cell, an ultraviolet conversion layer and a hydrophobic layer from bottom to top. The ultraviolet conversion layer comprises an encapsulation adhesive film and quantum dots, the quantum dots are doped in the encapsulation adhesive film, and the quantum dots convert ultraviolet light into visible light. The surface of the hydrophobic layer has hydrophobic properties.
The quantum dots have a specific energy band structure, can absorb ultraviolet rays and convert the ultraviolet rays into a visible light frequency band with higher absorption efficiency of the perovskite solar cell through the fluorescence generation process of the quantum dots; this conversion of energy increases the proportion of photons in the spectral range of the solar cell, thereby increasing the utilization of light energy. In addition, by arranging the ultraviolet conversion layer, ultraviolet light directly reaching the perovskite material is reduced, damage of ultraviolet light to the perovskite solar cell is reduced, and the service life of the perovskite solar cell is prolonged.
Further, the packaging adhesive film is made of polyvinyl alcohol. The polyvinyl alcohol (PVA) has higher transparency, and can effectively transmit visible light and ultraviolet rays in sunlight, so that quantum dots in the ultraviolet conversion layer can efficiently receive and convert the ultraviolet rays into the visible light, and the light utilization rate of the perovskite solar cell is improved. In addition, the refractive index of the polyvinyl alcohol is moderate, so that interface reflection and scattering can be reduced, and the light capturing efficiency of the perovskite solar cell is further improved. In addition, the polyvinyl alcohol has the characteristics of chemical resistance, high environmental stability, convenient processing and the like, and is convenient to apply in the invention.
Further, the quantum dots are cadmium selenide quantum dots, zinc sulfide quantum dots, cadmium sulfide quantum dots, indium phosphide quantum dots, carbon quantum dots and silicon quantum dots. The size of the quantum dots is nano-scale, the size is between a few nanometers and tens of nanometers, and the movement of electrons and holes is strongly limited by space, so that the energy level is discretized, namely the quantum confinement effect is generated. The materials such as cadmium selenide, zinc sulfide, cadmium sulfide, indium phosphide, carbon quantum dots, silicon quantum dots and the like have wider band gaps, can absorb ultraviolet rays, and release visible light with lower energy through the electron recombination process in the quantum dots. In addition, the conversion from ultraviolet rays to a specific visible light wavelength range can be realized by selecting proper quantum dot materials and adjusting the size of the quantum dots.
Further, the material of the hydrophobic layer is a fluoropolymer. Fluoropolymers are highly hydrophobic and water is difficult to form a continuous film on their surface, but rather tends to form droplets or roll off, helping to keep the surface dry and clean and reducing the damage to perovskite materials by water vapor and liquid water. In addition, the fluoropolymer has the characteristics of corrosion resistance, ultraviolet resistance, extreme weather resistance and the like, and is convenient to apply in the invention.
On the other hand, the invention provides a perovskite solar cell packaging method for improving the light utilization rate, which comprises the following steps:
Step 1, preparing an ultraviolet conversion material;
step 2, arranging an ultraviolet conversion material on the perovskite solar cell;
And 3, disposing a hydrophobic material on the ultraviolet conversion material.
The invention adopts a step-by-step packaging method to optimize by adopting different materials and technologies, and each step can be independently regulated and optimized, thereby simplifying the production flow and reducing the production difficulty and the cost.
Still further, step 1 includes:
Step 11, dissolving polyvinyl alcohol powder in water;
and step 12, slowly adding the quantum dot suspension into the polyvinyl alcohol solution, and continuously stirring to form the ultraviolet conversion material.
The method does not need complex equipment or high temperature conditions, and can prepare the composite material with the ultraviolet conversion function by only adding the quantum dot suspension into the polyvinyl alcohol solution and stirring, thereby being suitable for mass production. The polyvinyl alcohol is a stable polymer material, provides a stable microenvironment for the quantum dots, prevents oxidation and photo-corrosion of the quantum dots, and prolongs the service life of the ultraviolet conversion material.
Further, in step 2, the ultraviolet conversion material is spun, brushed or sprayed on the perovskite solar cell. The spin coating, brush coating or spray coating technology can form a uniform ultraviolet conversion material film on the surface of the perovskite solar cell, so that the consistency and maximization of the photoelectric conversion efficiency are ensured. In addition, the application process of the ultraviolet conversion material on the perovskite solar cell can be simplified by using the spin coating, brush coating or spray coating technology, industrial production is easy to realize, and the cost is reduced.
Further, in step 3, a hydrophobic material is disposed on the ultraviolet conversion material using a solution process. The solution processing method is to select a proper solvent to dissolve the hydrophobic material, and uniformly coat the hydrophobic material solution on the formed ultraviolet conversion material by using methods such as spinning, spraying or brushing; after coating, the solvent is evaporated and the hydrophobic material forms a uniform film. The hydrophobic layer prepared by the method has uniform thickness and high production efficiency, and is suitable for industrial production.
Further, in step 3, a hydrophobic material is disposed on the ultraviolet conversion material using a cold pressing method. The cold pressing method is to prepare a hydrophobic material into a sheet suitable for cold pressing, uniformly lay the hydrophobic material on the ultraviolet conversion material, and apply pressure at room temperature using a press machine so that the hydrophobic layer is attached on the ultraviolet conversion material. The cold pressing method does not need high temperature, and the perovskite material performance is prevented from being reduced or damaged due to the high temperature; in addition, the cold pressing method has mild operation process, and the original optical and electrical properties of the ultraviolet conversion material and the perovskite material are kept from being damaged.
Still further, in step 12, alumina nanoparticles are also incorporated simultaneously. The addition of alumina nanoparticles improves the performance of perovskite solar cells in several ways: (1) The addition of the alumina nano particles increases the path length of the ultraviolet light path through ultraviolet light scattering, so that the opportunity of absorbing the ultraviolet light by the quantum dots is increased, and the conversion efficiency of the perovskite solar cell is improved; (2) The aluminum oxide nano particles have higher hardness and higher heat conductivity, and the addition of the aluminum oxide nano particles improves the thermal stability and the mechanical strength of the ultraviolet conversion layer, so that the packaged perovskite solar cell is suitable for being used under various environmental conditions; (3) The alumina nano particles have certain moisture resistance, and the addition of the alumina nano particles reduces the absorption of the polyvinyl alcohol matrix to water vapor, so that the moisture resistance of the whole ultraviolet conversion layer and the stability in a humid environment are improved.
The invention has the beneficial effects that:
(1) According to the invention, ultraviolet rays are converted into visible light by utilizing quantum dots, so that the light utilization rate is improved, the damage of the ultraviolet rays to perovskite materials is reduced, the efficiency of the perovskite solar cell is improved, and the stability of the perovskite solar cell is improved.
(2) According to the invention, the hydrophobic layer reduces the residence time and accumulation of water drops and pollutants on the surface of the battery through the hydrophobic characteristic, takes away dust and pollutants on the surface, reduces the obstruction of the substances to sunlight absorption, and maintains the photoelectric conversion efficiency of the perovskite solar cell.
(3) According to the invention, the quantum dots are embedded into the packaging adhesive film, so that the quantum dots are prevented from being lost or dispersed due to environmental factors such as water washing; the hydrophobic layer is arranged outside the ultraviolet conversion layer, so that the loss of quantum dots is further prevented by the hydrophobic layer, and the long-term stability of the device is improved.
(4) The invention solves the problem of ultraviolet rays not by optimizing or designing the angle of the novel perovskite solar cell, but in the encapsulation link of the perovskite solar cell, and has the advantages of simple implementation, strong universality of technical application and the like.
By combining the beneficial effects, the method has good application prospect in the field of perovskite solar cell packaging.
Drawings
Fig. 1 is a schematic diagram of a perovskite solar cell package structure for improving light utilization.
Fig. 2 is a schematic diagram of a perovskite solar cell encapsulation method for improving light utilization.
In the figure: 1. perovskite solar cell; 2. an ultraviolet conversion layer; 3. a hydrophobic layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below by referring to the accompanying drawings and examples.
Example 1
The invention provides a perovskite solar cell packaging structure for improving light utilization rate, which comprises a perovskite solar cell 1, an ultraviolet conversion layer 2 and a hydrophobic layer 3 from bottom to top as shown in figure 1. The ultraviolet conversion layer 2 comprises an encapsulation adhesive film and quantum dots, the quantum dots are doped in the encapsulation adhesive film, ultraviolet rays are converted into visible light by the quantum dots, and the surface of the hydrophobic layer 3 has hydrophobic characteristics. Wherein, the packaging adhesive film is made of polyvinyl alcohol; the quantum dots are cadmium selenide quantum dots, zinc sulfide quantum dots, cadmium sulfide quantum dots, indium phosphide quantum dots, carbon quantum dots and silicon quantum dots; the material of the hydrophobic layer 3 is a fluoropolymer.
In the invention, the ultraviolet conversion layer 2 is positioned above the perovskite solar cell 1 and consists of an encapsulation adhesive film and doped quantum dots. The quantum dots are nano-sized, absorb ultraviolet rays and convert the ultraviolet rays into visible light, so that the spectrum range available for the solar cell is increased, and the whole photoelectric conversion efficiency is improved.
Preferably, the thickness of the ultraviolet conversion layer 2 is greater than 10 nm and less than 200 nm to ensure that enough quantum dots participate in the ultraviolet absorption and conversion process, and also avoid light propagation loss in the ultraviolet conversion layer. The thickness of the hydrophobic layer 3 is more than 50 nanometers and less than 2 micrometers so as to form effective waterproof and moistureproof effects; however, the thickness of the hydrophobic layer 3 is not easily larger than 10 μm, which results in an increase in weight and cost of the entire perovskite solar cell 1. When the quantum dot is cadmium selenide quantum dot, the size is more than 2 nanometers and less than 7 nanometers; when the quantum dot is zinc sulfide quantum dot, the size is more than 2 nanometers and less than 5 nanometers; when the quantum dot is cadmium sulfide quantum dot, the size is more than 2 nanometers and less than 6 nanometers; when the quantum dot is indium phosphide quantum dot, the size is more than 2 nanometers and less than 7 nanometers; when the quantum dot is a carbon quantum dot, the size of the quantum dot is more than 1 nanometer and less than 10 nanometers; when the quantum dot is silicon quantum dot, the size is more than 2 nanometers and less than 10 nanometers. When the quantum dot is within the above range, the quantum dot is capable of absorbing ultraviolet light and converting the ultraviolet light into visible light. Preferably, the quantum dots are cadmium selenide quantum dots or cadmium sulfide quantum dots, which have high quantum yields and can effectively convert absorbed ultraviolet light into visible light. The perovskite solar cell 1 may be an organic-inorganic hybrid perovskite solar cell, an all-inorganic perovskite solar cell, a flexible perovskite solar cell or a perovskite solar cell stack structure.
Example 2
The invention provides a perovskite solar cell packaging method for improving light utilization rate, which is shown in fig. 2 and comprises the following steps: step 1, preparing an ultraviolet conversion material; step 2, arranging an ultraviolet conversion material on the perovskite solar cell; and 3, disposing a hydrophobic material on the ultraviolet conversion material. In order to more clearly illustrate the packaging method of the present invention, the following steps are introduced:
And step 1, preparing an ultraviolet conversion material.
In this step, firstly, polyvinyl alcohol powder is dissolved in water (step 11), specifically, polyvinyl alcohol with moderate molecular weight is selected, the molecular weight is between 30000 and 70000, and the solubility is good, so that a good film is formed; dissolving in water under heating at a temperature of more than 80deg.C and less than 90deg.C to facilitate rapid and complete dissolution; in the dissolving process, stirring is continued until the polyvinyl alcohol powder is completely dissolved, so that the solution is ensured to be free of particles, uniform and transparent. Then, slowly adding the quantum dot suspension into the polyvinyl alcohol solution, and continuously stirring to form an ultraviolet conversion material (step 12), specifically, preparing an aqueous quantum dot suspension; slowly dripping the quantum dot suspension into the polyvinyl alcohol solution while continuously stirring to prevent the quantum dots from gathering, wherein the stirring speed is 200-500 rpm; after stirring is completed, the solution is left to stand to allow large particles or undispersed quantum dots in the solution to settle, and the supernatant is taken for subsequent application.
In addition, the quantum dots can also be rare earth ion nano particles doped with erbium (Er), thulium (Tm) and yttrium (Yb). The rare earth ion nano particles have higher chemical stability and thermal stability, and are beneficial to improving the stability and durability of the whole packaging structure.
And 2, arranging an ultraviolet conversion material on the perovskite solar cell.
In this step, the ultraviolet conversion material is spun, brushed or sprayed on the perovskite solar cell 1. Specifically, the supernatant from the previous step is spun, brushed or sprayed onto the selected perovskite solar cell 1. When using the spin process, the spin speed is 1000 to 3000rpm, and the spin time is greater than 30 seconds and less than 1 minute. When using a brushing process, strict control of the uniformity and thickness of the brush is required. When spraying is used, it is necessary to control the nozzle size, the spray pressure, and the spray distance to ensure uniformity of the coating. After the supernatant is coated, heat treatment is performed to improve the crystallization quality of the ultraviolet conversion material and the bonding strength of the perovskite solar cell 1, and the temperature of the heat treatment is lower than 85 ℃ so as not to damage the perovskite solar cell.
And 3, disposing a hydrophobic material on the ultraviolet conversion material.
In this step, the hydrophobic material may be disposed on the ultraviolet conversion material by a solution process, or may be disposed on the ultraviolet conversion material by a cold press process. The hydrophobic material is a fluoropolymer, such as Polytetrafluoroethylene (PTFE).
When solution processing is employed, the fluoropolymer is dissolved in a solvent which may be a fluorinated solvent such as perfluoroalkanes, perfluoroethers, and dimethyl sulfoxide or dimethylformamide. Stirring thoroughly during the dissolution process to form a homogeneous solution. Spin (spin speed 2000 to 8000rpm, spin time 10 seconds to 60 seconds), spray (spray pressure between 10 to 100 psi) or brush on the uv conversion material that has been formed. After coating, the solvent is evaporated, in particular naturally dried at room temperature or accelerated by heating at a temperature above 50 ℃ and below 80 ℃. After the solvent is evaporated, the hydrophobic material forms a uniform film, and the perovskite solar cell packaging is completed.
When the cold pressing method is adopted, the hydrophobic material is firstly prepared into a sheet, the sheet of the hydrophobic material is uniformly paved on the ultraviolet conversion material, and the pressure machinery is used for time pressure at room temperature, so that the hydrophobic sheet is attached on the ultraviolet conversion material. The thickness of the sheet of hydrophobic material is greater than 2 microns and less than 20 microns. The applied pressure is greater than 20 kilopascals and less than 800 kilopascals. The time for applying the pressure is more than 2 seconds and less than 5 minutes. When pressure is applied, the ambient temperature is higher than 20 ℃ and lower than 30 ℃.
Still further, in step 12, alumina nanoparticles are also incorporated simultaneously. Firstly, synthesizing alumina nano particles, and preparing the alumina nano particles by adopting a sol-gel method, a hydrothermal synthesis method or a combustion synthesis method; the diameter of the alumina nano particles is more than 10 nanometers and less than 50 nanometers. Then, alumina nanoparticles were incorporated: dispersing the alumina nano particles in a solvent, wherein an ultrasonic dispersion technology is preferably used during the dispersion to ensure the uniform dispersion of the alumina nano particles; mixing and stirring the uniformly dispersed alumina nanoparticle solution and the polyvinyl alcohol solution, and uniformly doping the alumina nanoparticles and the quantum dots into the polyvinyl alcohol solution.
Preferably, the quantum dots are covered with a silicon dioxide layer. The thickness of the silicon dioxide layer is less than 5 nanometers. The silicon dioxide layer isolates the quantum dot from contacting with the external environment, reduces photooxidation and moisture erosion, and improves the long-term optical stability and chemical stability of the quantum dot. In addition, the silicon dioxide layer is used as an isolation layer, so that non-radiative energy transfer between quantum dots is reduced, the luminous efficiency is improved, and finally the conversion efficiency of the perovskite solar cell is improved.
Preferably, the hydrophobic layer and the ultraviolet conversion layer are optically matched by using an interface optimization method, so that light reflection at the interface is reduced, and light transmission efficiency is improved. Specifically, a transition layer is prepared between the ultraviolet conversion layer and the hydrophobic layer, and the refractive index of the transition layer is between the refractive indexes of the ultraviolet conversion layer and the hydrophobic layer. Preferably, the transition layer material is an organosilicon material, such as a polysiloxane, which has good hydrophobic properties and an adjustable refractive index, and can be used as the transition layer material to achieve effective engagement between polyvinyl alcohol and a fluoropolymer. Alternatively, the polysiloxane may be formed into a thin layer by spin coating or spray coating, and then heat treated to form a stable transition layer.
In summary, the present invention provides a perovskite solar cell package structure for improving light utilization, which includes a bottom-up perovskite solar cell 1, an ultraviolet conversion layer 2, and a hydrophobic layer 3. The ultraviolet conversion layer 2 comprises a packaging adhesive film and quantum dots, wherein the quantum dots are doped in the packaging adhesive film, and the quantum dots convert ultraviolet rays into visible light. The surface of the hydrophobic layer 3 has hydrophobic properties. According to the invention, the quantum dots convert ultraviolet into a visible light frequency band with higher absorption efficiency of the perovskite solar cell, so that the utilization of light energy is improved. In addition, by arranging the ultraviolet conversion layer 2, ultraviolet light directly reaching the perovskite material is reduced, the damage of the ultraviolet light to the perovskite solar cell is reduced, and the service life of the perovskite solar cell is prolonged, so that the invention has good application prospect in the technical field of perovskite solar cell packaging.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the application.

Claims (10)

1. The perovskite solar cell packaging structure for improving the light utilization rate is characterized in that: comprises a perovskite solar cell, an ultraviolet conversion layer and a hydrophobic layer from bottom to top; the ultraviolet conversion layer comprises an encapsulation adhesive film and quantum dots, the quantum dots are doped in the encapsulation adhesive film, ultraviolet rays are converted into visible light by the quantum dots, and the surface of the hydrophobic layer has hydrophobic characteristics.
2. The perovskite solar cell package structure for improving light utilization of claim 1, wherein: the packaging adhesive film is made of polyvinyl alcohol.
3. The perovskite solar cell package structure for improving light utilization of claim 1, wherein: the quantum dots are cadmium selenide quantum dots, zinc sulfide quantum dots, cadmium sulfide quantum dots, indium phosphide quantum dots, carbon quantum dots and silicon quantum dots.
4. The perovskite solar cell package structure for improving light utilization of claim 1, wherein: the material of the hydrophobic layer is fluorine polymer.
5. The perovskite solar cell packaging method for improving the light utilization rate is characterized by comprising the following steps of:
Step 1, preparing an ultraviolet conversion material;
step 2, arranging an ultraviolet conversion material on the perovskite solar cell;
And 3, disposing a hydrophobic material on the ultraviolet conversion material.
6. The method for packaging a perovskite solar cell for improving light utilization as defined in claim 5, wherein: the step 1 comprises the following steps:
Step 11, dissolving polyvinyl alcohol powder in water;
and step 12, slowly adding the quantum dot suspension into the polyvinyl alcohol solution, and continuously stirring to form the ultraviolet conversion material.
7. The method for packaging a perovskite solar cell for improving light utilization as defined in claim 6, wherein: in step 2, the ultraviolet conversion material is spun, brushed or sprayed on the perovskite solar cell.
8. The method for packaging a perovskite solar cell for improving light utilization as defined in claim 7, wherein: in step 3, a solution process is used to place the hydrophobic material on the ultraviolet conversion material.
9. The method for packaging a perovskite solar cell for improving light utilization as defined in claim 7, wherein: in step 3, a hydrophobic material is disposed on the ultraviolet conversion material using a cold pressing method.
10. A method of packaging a perovskite solar cell having improved light utilization as defined in any one of claims 7-9 wherein: in step 12, alumina nanoparticles are also incorporated simultaneously.
CN202410431387.XA 2024-04-11 2024-04-11 A perovskite solar cell packaging structure and packaging method for improving light utilization efficiency Pending CN118317618A (en)

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