CN115602692A - Solar laminated cell, cell module and photovoltaic system - Google Patents
Solar laminated cell, cell module and photovoltaic system Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/142—Energy conversion devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Abstract
The application is suitable for the technical field of solar cells, and provides a solar laminated cell, a cell module and a photovoltaic system. The solar laminated cell comprises a first cell, a composite layer and a second cell which are sequentially laminated, wherein the first cell comprises a glass substrate, a conductive layer, a first transmission layer, a first light absorption layer and a second transmission layer which are sequentially laminated; the second cell includes a third transfer layer, a second light absorption layer, a fourth transfer layer, and an electrode, which are sequentially stacked in a direction from the first cell to the composite layer; the first light absorption layer comprises a first area and a second area, the first area is provided with a perovskite light absorption block, and the second area is provided with an organic light absorption block. Therefore, the band gap of the first cell can be adjusted through the organic light absorption block, and light can be selectively absorbed and transmitted, so that the second cell can fully absorb sunlight transmitted by the first cell, and the whole photoelectric conversion efficiency of the solar laminated cell can be improved.
Description
Technical Field
The application belongs to the technical field of solar cells, and particularly relates to a solar laminated cell, a cell module and a photovoltaic system.
Background
Solar cell power generation is a sustainable clean energy source that can convert sunlight into electrical energy using the photovoltaic effect of semiconductor p-n junctions.
Two sub-cells are generally stacked as a laminate battery in the related art. However, one of the two sub-cells is the top cell and the other is the bottom cell, and there is naturally a difference in the reception of directly incident sunlight. Furthermore, in addition to direct incidence of sunlight, sunlight transmitted from one subcell may also be incident on another subcell, which is generally difficult to transmit a large amount of sunlight or to absorb sunlight transmitted from another subcell. These seriously affect the photoelectric conversion efficiency of the entire laminate battery.
Therefore, how to improve the overall photoelectric conversion efficiency of the stacked cell becomes a problem to be solved urgently.
Disclosure of Invention
The application provides a solar laminated cell, a cell module and a photovoltaic system, aiming at solving the problem of how to improve the overall photoelectric conversion efficiency of the laminated cell.
The solar laminated cell comprises a first cell, a composite layer and a second cell which are sequentially laminated, wherein the first cell comprises a glass substrate, a conductive layer, a first transmission layer, a first light absorption layer and a second transmission layer which are sequentially laminated; the second cell includes a third transfer layer, a second light absorbing layer, a fourth transfer layer, and an electrode sequentially stacked in a direction from the first cell to the composite layer; the first light absorption layer comprises a first area and a second area, the first area is provided with a perovskite light absorption block, and the second area is provided with an organic light absorption block.
Optionally, the number of the perovskite light absorption blocks is one, the number of the organic light absorption blocks is multiple, and the organic light absorption blocks are spaced by one perovskite light absorption block.
Optionally, the projection of the organic light absorption block on the glass substrate is circular.
Optionally, each of the organic light absorbing blocks includes a donor layer and an acceptor layer stacked correspondingly, and for one of the organic light absorbing blocks:
the donor layer is a PTB7-Th layer, and the acceptor layer is an IEICO-4F layer;
or, the donor layer is a PTB7-Th layer and the receptor layer is a Y6 layer;
or, the donor layer is a PM6 layer, and the acceptor layer is a Y7 layer;
or, the donor layer is a PM6 layer, and the acceptor layer is a Y6 layer.
Optionally, the organic light absorbing block has a thickness of 80nm to 500nm.
Optionally, the thickness of the perovskite light absorption block is 300nm-600nm.
Optionally, the composite layer has a thickness of 10nm to 40nm.
Optionally, the thickness of the electrode is 10nm-30nm.
Optionally, the organic absorber block includes an acceptor layer and a corresponding donor layer, the acceptor layer having an absorption edge of a material from 700nm to 1200nm.
The application provides a battery assembly, which comprises the solar laminated battery.
The photovoltaic system provided by the application comprises the battery assembly.
The solar laminated cell, the cell module and the photovoltaic system have the advantages that the first light absorption layer comprises the perovskite light absorption blocks and the organic light absorption blocks, so that light can be absorbed and transmitted differently through the different light absorption blocks, sunlight transmitted from the first cell can be fully absorbed by the second cell, photo-generated current of the first cell and photo-generated current of the second cell are matched more, and the whole photoelectric conversion efficiency of the solar laminated cell is improved.
Drawings
Fig. 1 is a schematic structural diagram of a solar tandem cell according to an embodiment of the present application;
fig. 2 is a schematic structural view of a first light absorbing layer of a solar tandem cell according to an embodiment of the present application;
description of the main element symbols:
the solar laminated cell comprises a solar laminated cell 100, a first cell 10, a glass substrate 11, a conductive layer 12, a first transmission layer 13, a first light absorption layer 14, a perovskite light absorption block 141, an organic light absorption block 142, a second transmission layer 15, a composite layer 101, a second cell 20, a third transmission layer 21, a second light absorption layer 22, a fourth transmission layer 23 and an electrode 24.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the application, because first light absorbing layer includes perovskite light absorbing block and organic light absorbing block, the absorption that can carry out the difference through different light absorbing blocks to light and transmission for the second battery fully absorbs from the sunlight of first battery transmission, is favorable to improving the holistic photoelectric conversion efficiency of solar energy tandem cell.
Example one
Referring to fig. 1 and 2, a solar cell stack 100 according to an embodiment of the present disclosure includes a first cell 10, a composite layer 101, and a second cell 20 stacked in sequence; the first cell 10 includes a glass substrate 11, a conductive layer 12, a first transport layer 13, a first light absorption layer 14, and a second transport layer 15, which are sequentially laminated; the second cell 20 includes a third transfer layer 21, a second light-absorbing layer 22, a fourth transfer layer 23, and an electrode 24, which are sequentially stacked in a direction from the first cell 10 to the composite layer 101; the first light-absorbing layer 14 includes a first region provided with a perovskite light-absorbing block 141 and a second region provided with an organic light-absorbing block 142.
In the solar tandem cell 100 according to the embodiment of the present application, since the first light absorption layer 14 includes the perovskite light absorption block 141 and the organic light absorption block 142, light can be absorbed and transmitted differently by different light absorption blocks, so that the second cell 20 can sufficiently absorb sunlight transmitted from the first cell 10, which is beneficial to improving the overall photoelectric conversion efficiency of the solar tandem cell 100.
It is understood that if the organic light absorption block 142 is not provided and the first light absorption layer 14 is entirely a perovskite layer, light absorbed by the perovskite layer in the solar light incident to the first cell 10 is entirely absorbed at the first light absorption layer 14 and may not be transmitted to the perovskite layer of the second cell 20. And one of the first cell 10 and the second cell 20 is a bottom cell and the other is a top cell, there is a difference in nature in the sunlight that can be received. In this way, when the first cell 10 and the second cell 20 are electrically connected through the composite layer 101, the generated currents of the first cell 10 and the second cell 20 are liable to be mismatched, and the photoelectric conversion efficiency of the entire solar laminated cell 100 is poor.
It will be appreciated that the organic light absorbing block 142 may also absorb light and produce current, but the band of absorption and the effect of producing current are different from that of perovskite. In the present application, by providing the organic light-absorbing block 142, light rays that are absorbed by the perovskite layer in the sunlight incident to the organic light-absorbing block 142 are transmitted from the organic light-absorbing block 142 and are incident to the perovskite layer of the second cell 20 to be absorbed, so that the light-generated current of the second cell 20 can be increased. In this way, the light absorption difference between the organic light absorption block 142 and the perovskite can be utilized to make the photo-generated currents of the first cell 10 and the second cell 20 more matched, thereby improving the overall photoelectric conversion efficiency of the solar cell stack 100.
Specifically, the current matching degree of the first cell 10 and the second cell 20 can be adjusted by adjusting the area ratio of the organic light-absorbing block 142 to the perovskite light-absorbing block 141 to adjust the amount of light transmitted by the organic light-absorbing block 142 and the amount of current generated; the amount of light transmitted and the amount of current generated by the organic light absorption block 142 may be adjusted by adjusting the thickness of the organic light absorption block 142, thereby adjusting the current matching degree of the first and second batteries 10 and 20.
In the embodiment, the organic light absorption block 142 can absorb ultraviolet light and infrared light, transmit visible light, and the visible light can be incident to the second cell 20 after passing through the first cell 10, so that the second cell 20 can sufficiently absorb sunlight. In other embodiments, the organic light-absorbing block 142 can selectively transmit light in other wavelength bands. The specific wavelength band of the light transmitted or absorbed by the organic light absorption block 142 is not limited herein.
Specifically, the absorption and transmission of light by the organic light absorbing block 142 can be adjusted by adjusting the material concentration of the organic light absorbing block 142; the absorption and transmission of light by the organic light absorption block 142 may be adjusted by adjusting the thickness of the organic light absorption block 142.
Specifically, the glass substrate 11 may be a transparent glass substrate 11. Further, the transmittance of the glass substrate 11 may be greater than 90%. For example 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%. Thus, the glass substrate 11 has high light transmittance, so that more sunlight can enter the solar tandem cell 100, which is beneficial to improving the photoelectric conversion efficiency. Preferably, the glass substrate 11 has a light transmittance of 92%.
Specifically, the glass substrate 11 includes one or more of float glass, embossed glass, tempered glass, antireflection glass, PET, PEN, PEI, PMMA. Thus, the glass substrate 11 is provided in various forms, which are convenient to select according to actual production conditions.
Specifically, the Conductive layer 12 includes a Transparent Conductive Oxide (TCO). Thus, the TCO can effectively collect the current of the solar cell stack 100, and ensure the normal operation of the solar cell stack 100. Moreover, the TCO has high permeability and can reflect light, so that the loss of sunlight can be reduced. Thus, the photoelectric conversion efficiency is advantageously improved.
Further, the transparent conductive Oxide includes one or more of Fluorine-doped Tin Oxide (FTO), indium Zinc Oxide (IZO), indium Tin Oxide (ITO), aluminum-doped Zinc Oxide (AZO), aluminum-doped Tin Oxide (ATO), indium-doped Gallium Oxide (IGO).
Specifically, one of the first transport layer 13 and the second transport layer 15 is an electron transport layer, and the other is a hole transport layer.
Further, the electron transport layer comprises a C60 layer, a PCBM layer, a titanium oxide (TiO 2) layer, a zinc oxide (ZnO) layer, and zinc stannate (ZnSnO) 4 ) Layer or tin oxide (SnO) 2 ) One or more of the layers.
Further, the hole transport layer includes PEDOT: one or more of a PSS layer, a NiOx layer, a Spiro-oMeTad layer, a CuPc layer, a CuSCN layer and a PTAA layer.
In this way, holes and electrons excited by sunlight can be transmitted in time through the first transmission layer 13 and the second transmission layer 15, and the accumulation of holes and electrons is prevented from affecting the service life of the solar tandem cell 100. Moreover, the hole transport layer can also block electrons, and the electron transport layer can also block holes, thereby reducing the recombination of holes and electrons.
Further, the thickness of the first transport layer 13 is 10nm to 40nm. For example, 10nm, 15nm, 20nm, 30nm, and 40nm. In this way, the thickness of the first transfer layer 13 is made to be in an appropriate range, ensuring the effect of transferring one carrier and blocking the other carrier.
Further, the thickness of the second transport layer 15 is 10nm to 40nm. For example, 10nm, 15nm, 20nm, 30nm, 40nm. In this way, the thickness of the second transfer layer 15 is made to be in an appropriate range, ensuring the effect of transferring one carrier and blocking the other carrier.
Specifically, the first light absorption layer 14 is divided into a first region, which is a region where the perovskite light absorption block 141 is disposed, and a second region, which is a region where the organic light absorption block 142 is disposed. In this way, the first light-absorbing layer 14 does not include the other regions except the first region and the second region, and the perovskite light-absorbing block 141 and the organic light-absorbing block 142 can be provided by making full use of the space of the first light-absorbing layer 14, so that the effect of light absorption can be sufficiently improved. In other embodiments, the first light absorbing layer 14 may also include other regions besides the first and second regions.
Note that since the first region is a region where the perovskite light absorbing block 141 is disposed and the second region is a region where the organic light absorbing block 142 is disposed, the distribution of the first region and the second region corresponds to the distribution of the perovskite light absorbing block 141 and the organic light absorbing block 142, and it is possible to refer to each other, and only the distribution of the perovskite light absorbing block 141 and the organic light absorbing block 142 will be described herein.
Specifically, the crystal structure of the material of the perovskite light absorption block 141 is ABX 3 Type A is Cs + 、CH(NH 2 ) 2 + 、CH 3 NH 3 + 、C(NH 2 ) 3 + B is Pb 2+ 、Sn 2+ At least one of (1), X is Br - 、I - 、Cl - One or more of (a). Thus, the perovskite light absorption block 141 has a good light absorption effect, and is beneficial to improving the photoelectric conversion efficiency.
For example, A is Cs + B is Pb 2+ X is Br - (ii) a As another example, A is Cs + And CH (NH) 2 ) 2 + B is Pb 2+ X is Br - (ii) a As another example, A is Cs + B is Pb 2+ And Sn 2+ X is Br - (ii) a For example, A is Cs + B is Pb 2+ X is Br - And I - (ii) a As another example, A is CH 3 NH 3 + And C (NH) 2 ) 3 + B is Pb 2+ X is I - And Cl - (ii) a As another example, A is Cs + 、CH(NH 2 ) 2 + 、CH 3 NH 3 + And C (NH) 2 ) 3 + B is Pb 2+ And Sn 2+ And X is Br-, I-and Cl-.
Specifically, the composite layer 101 is an ITO layer, a silver layer, or a stacked ITO layer and a silver layer. Thus, the first cell 10 and the second cell 20 are electrically connected, and the normal function of the solar cell stack 100 is ensured.
Specifically, the third transmission layer 21 and the fourth transmission layer 23 are similar to the first transmission layer 13 and the second transmission layer 15, and the explanation of the third transmission layer 21 and the fourth transmission layer 23 can refer to the foregoing, and are not repeated herein to avoid redundancy.
In the present embodiment, the second light absorbing layer 22 is a perovskite layer. For explanation and explanation of the second light absorbing layer 22, reference may be made to the aforementioned part regarding the perovskite light absorbing block 141, and for avoiding redundancy, the explanation thereof is omitted.
In other embodiments, the second light absorbing layer 22 may include a perovskite light absorbing block 141 and an organic light absorbing block 142. The explanation and description of the second light absorbing layer 22 can refer to the parts related to the first light absorbing layer 14, and the description is omitted here for avoiding redundancy.
Specifically, the electrode 24 includes one or more of gold, silver, aluminum, graphene. Thus, the electrode 24 has good conductivity, and can conduct current from the solar laminated cell 100.
Alternatively, the glass substrate 11 with the conductive layer 12 may be cleaned when the solar laminate cell 100 is manufactured; depositing a first transport layer 13 on the conductive layer 12; depositing a perovskite light absorption block 141 and an organic light absorption block 142 on a first region and a second region of the first transmission layer 13 respectively to form a first light absorption layer 14; depositing a second transport layer 15 on the first light absorbing layer 14; depositing a composite layer 101 on the second transfer layer 15; depositing a third transfer layer 21 on the composite layer 101; depositing a second light absorbing layer 22 on the third transport layer 21; depositing a fourth transmission layer 23 on the second light absorbing layer 22; an electrode 24 is deposited on the fourth transfer layer 23.
Specifically, when the glass substrate 11 with the conductive layer 12 is cleaned, the glass substrate 11 with the conductive layer 12 may be ultrasonically cleaned by using a non-phosphorus cleaning agent, deionized water, acetone, and IPA in sequence; and then purging with high-purity nitrogen. Further, the duration of ultrasonic cleaning is 10min-20min, such as 12min, 15min, 18min, 20min. Preferably, the time period of ultrasonic cleaning is 15min. Therefore, the cleaning effect is better, and the subsequent deposition of the film layer is facilitated.
Specifically, when one of the above-described film layers is deposited, one or more of a solution coating method, a physical vapor deposition method, a screen printing method, chemical vapor deposition, electroplating, electroless plating, and ion plating may be used.
Specifically, the perovskite light-absorbing block 141 and the organic light-absorbing block 142 may be deposited on the first region and the second region of the first transport layer 13, respectively, using a mask. The mask may be a predetermined pattern. The mask may be customized according to the desired position and shape of the organic light-absorbing block 142.
Example two
Referring to fig. 2, in some alternative embodiments, the number of perovskite light absorption blocks 141 is one, the number of organic light absorption blocks 142 is plural, and a plurality of organic light absorption blocks 142 are spaced by one perovskite light absorption block 141.
Therefore, the staggered distribution of the organic light absorption blocks 142 and the perovskite light absorption is convenient to realize, and the production efficiency is favorably improved. Moreover, since the number of the organic light absorbing blocks 142 is plural, selective absorption and transmission of light can be performed at plural positions, and the amount of light transmitted and the amount of current generated by the organic light absorbing blocks 142 can be adjusted more flexibly, so that the effect of current matching is better.
In other embodiments, the number of the perovskite light absorption blocks 141 is plural, the number of the organic light absorption blocks 142 is one, and the plurality of perovskite light absorption blocks 141 are separated by one organic light absorption block 142. In other embodiments, the number of the perovskite light absorption blocks 141 is plural, the number of the organic light absorption blocks 142 is plural, and the plurality of perovskite light absorption blocks 141 and the plurality of organic light absorption blocks 142 are alternately distributed. The perovskite light-absorbing blocks 141 and the organic light-absorbing blocks 142 are not specifically distributed.
In this embodiment, the perovskite light-absorbing block 141 is formed in the first region and the organic light-absorbing block 142 is formed in the second region using a mask. In this way, the positions of the perovskite light absorption block 141 and the organic light absorption block 142 are made more accurate.
In other embodiments, the entire perovskite light absorption layer may be manufactured, through holes are formed in a plurality of second regions of the entire perovskite light absorption layer, organic light absorption blocks 142 are disposed in the through holes, and the perovskite light absorption layer outside the through holes is a perovskite light absorption block 141.
In the present embodiment, the pitches of at least two adjacent sets of organic light absorbing blocks 142 are the same. Preferably, the pitches of any two adjacent sets of organic light absorbing blocks 142 are the same. So, make organic light absorption piece 142 evenly distributed to make the selective absorption and the transmissive region to light more even, the effect is better, is favorable to improving photoelectric conversion efficiency.
In other embodiments, there may be two sets of adjacent organic light absorbing blocks 142 with different pitches.
EXAMPLE III
Referring to fig. 2, in some alternative embodiments, the projection of the organic light-absorbing block 142 on the glass substrate 11 is circular.
Therefore, the organic light-absorbing block 142 is regular in shape, convenient to manufacture and beneficial to improving the production efficiency.
In other embodiments, the projection of the organic light-absorbing block 142 on the glass substrate 11 may also be rectangular, square, oval, triangular, racetrack, or other shapes, and is not limited herein.
Specifically, all the organic light-absorbing blocks 142 have a circular shape in projection on the glass substrate 11 and have the same diameter. Thus, it is convenient to manufacture and adjust the current matching in units of the organic light-absorbing block 142.
In other embodiments, all the organic light-absorbing blocks 142 may have different shapes; some of the organic light absorbing blocks 142 may have the same shape, and the remaining organic light absorbing blocks 142 may have different shapes; all the organic light absorbing blocks 142 may have the same shape but different sizes. The relationship between the shapes and sizes of the plurality of organic light absorbing blocks 142 is not limited herein.
Example four
In some alternative embodiments, each organic light-absorbing block 142 includes a corresponding stack of donor and acceptor layers, and for one organic light-absorbing block 142:
the donor layer is a PTB7-Th layer, and the acceptor layer is an IEICO-4F layer;
or, the donor layer is a PTB7-Th layer, and the acceptor layer is a Y6 layer;
or, the donor layer is a PM6 layer, and the acceptor layer is a Y7 layer;
alternatively, the donor layer is a PM6 layer and the acceptor layer is a Y6 layer.
In this way, the materials of the donor layer and the acceptor layer of the organic light-absorbing block 142 are more suitable, so that the light absorption and transmission capabilities of the organic light-absorbing block 142 are at a suitable level, which is beneficial for adjusting the current matching degree of the first cell 10 and the second cell 20.
Note that the above four groups of cases are for one organic light absorbing block 142, that is, for one organic light absorbing block 142, the donor layer and the acceptor layer are one of the four groups of cases.
In the case where the number of the organic light absorption blocks 142 is plural, all the organic light absorption blocks 142 may be the same for all the organic light absorption blocks 142, one of the four groups; part of the organic light-absorbing blocks 142 may also be the same, in one of these four cases; all the organic light absorption blocks 142 may be different, and are respectively a plurality of the four groups. And are not limited thereto.
EXAMPLE five
In some alternative embodiments, the organic light absorbing block 142 has a thickness of 80nm to 500nm. For example, 80nm, 90nm, 100nm, 250nm, 400nm, or 500nm.
Therefore, the thickness of the organic light absorption block 142 is in a proper range, poor current matching effect caused by too large or too small thickness of the organic light absorption block 142 is avoided, and improvement of overall photoelectric conversion efficiency is facilitated.
EXAMPLE six
In some alternative embodiments, the thickness of the perovskite absorber block 141 is 300nm to 600nm. For example, 300nm, 400nm, 500nm, and 600nm.
Thus, the thickness of the perovskite light absorption block 141 is in a proper range, so that the light absorption effect is good, and the photoelectric conversion efficiency of the first cell 10 is improved.
EXAMPLE seven
In some alternative embodiments, the composite layer 101 has a thickness of 10nm to 40nm. For example, 10nm, 15nm, 20nm, 30nm, and 40nm.
Therefore, the thickness of the composite layer 101 is in a proper range, poor conductive effect caused by too small thickness can be avoided, and material waste caused by too large thickness can also be avoided.
Example eight
In some alternative embodiments, the thickness of the electrode 24 is 10nm to 30nm. For example, 10nm, 15nm, 20nm, 25nm, and 30nm.
Therefore, the thickness of the electrode 24 is in a proper range, so that poor current leading-out effect caused by too small thickness can be avoided, and material waste caused by too large thickness can also be avoided.
Example nine
In some alternative embodiments, the organic absorber block 142 includes an acceptor layer and a corresponding donor layer, the material of the acceptor layer having an absorption edge in the range of 700nm to 1200nm. For example, 700nm, 800nm, 1000nm, 1100nm, 1200nm.
Therefore, the absorption edge of the material of the receptor layer is in a proper range, so that the material of the receptor layer is proper, and the current matching effect is improved.
Example ten
The battery module according to the embodiment of the present application includes the solar tandem cell 100 according to any one of the first to ninth embodiments.
In the battery assembly according to the embodiment of the present application, since the first light-absorbing layer 14 includes the perovskite light-absorbing block 141 and the organic light-absorbing block 142, light can be absorbed and transmitted differently by different light-absorbing blocks, so that the second cell 20 can sufficiently absorb sunlight transmitted from the first cell 10, which is beneficial to improving the overall photoelectric conversion efficiency of the solar tandem cell 100.
In the embodiment, a plurality of solar tandem cells 100 in the cell module may be sequentially connected in series to form a cell string, so as to implement a series bus output of current, for example, the series connection of the cells may be implemented by providing solder strips (bus bars, interconnection bars), a conductive back plate, and the like.
It is understood that in such embodiments, the cell assembly may further include a metal frame, a backsheet, a photovoltaic glass, and an adhesive film. The adhesive film may be filled between the front side and the back side of the solar laminated cell 100, the photovoltaic glass, the adjacent cell sheets, and the like, and as the filler, the adhesive film may be a transparent colloid with good light transmittance and aging resistance, for example, the adhesive film may be an EVA adhesive film or a POE adhesive film, which may be specifically selected according to actual situations, and is not limited herein.
The photovoltaic glass may be an ultra-white glass, which has high light transmittance, high transparency, and excellent physical, mechanical, and optical properties, and for example, the ultra-white glass may have a light transmittance of more than 92%, which may protect the solar cell 100 without affecting the efficiency of the solar cell 100 as much as possible. Meanwhile, the adhesive film can bond the photovoltaic glass and the solar laminated cell 100 together, and the existence of the adhesive film can seal, insulate, prevent water and prevent moisture for the solar laminated cell 100.
The back plate can be attached to an adhesive film on the back surface of the solar laminated cell 100, the back plate can protect and support the solar laminated cell 100, and has reliable insulation, water resistance and aging resistance, the back plate can be selected from multiple materials, and can be generally toughened glass, organic glass, an aluminum alloy TPT composite adhesive film and the like, and the back plate can be specifically arranged according to specific conditions, and is not limited herein. The whole of the back sheet, the solar tandem cell 100, the adhesive film and the photovoltaic glass can be disposed on a metal frame, which serves as a main external support structure of the whole cell module and can stably support and mount the cell module, for example, the cell module can be mounted at a position where the cell module is required to be mounted through the metal frame.
EXAMPLE eleven
The photovoltaic system of this application embodiment includes the battery assembly of embodiment ten.
In the photovoltaic system according to the embodiment of the present application, since the first light absorption layer 14 includes the perovskite light absorption block 141 and the organic light absorption block 142, light can be absorbed and transmitted differently by different light absorption blocks, so that the second cell 20 can sufficiently absorb sunlight transmitted from the first cell 10, which is beneficial to improving the overall photoelectric conversion efficiency of the solar tandem cell 100.
In this embodiment, the photovoltaic system can be applied to photovoltaic power stations, such as ground power stations, roof power stations, water surface power stations, etc., and can also be applied to devices or apparatuses that generate electricity by using solar energy, such as user solar power sources, solar street lamps, solar cars, solar buildings, etc. Of course, it is understood that the application scenario of the photovoltaic system is not limited thereto, that is, the photovoltaic system can be applied in all fields requiring solar energy for power generation. Taking a photovoltaic power generation system network as an example, the photovoltaic system may include a photovoltaic array, a combiner box and an inverter, the photovoltaic array may be an array combination of a plurality of battery modules, for example, the plurality of battery modules may constitute a plurality of photovoltaic arrays, the photovoltaic array is connected to the combiner box, the combiner box may combine currents generated by the photovoltaic array, and the combined currents are converted into alternating currents required by a utility grid through the inverter and then are connected to the utility grid to realize solar power supply.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. Furthermore, the particular features, structures, materials, or characteristics described in connection with the embodiments or examples disclosed herein may be combined in any suitable manner in any one or more of the embodiments or examples.
Claims (11)
1. The solar laminated cell is characterized by comprising a first cell, a composite layer and a second cell which are sequentially laminated, wherein the first cell comprises a glass substrate, a conductive layer, a first transmission layer, a first light absorption layer and a second transmission layer which are sequentially laminated; the second cell includes a third transfer layer, a second light absorbing layer, a fourth transfer layer, and an electrode sequentially stacked in a direction from the first cell to the composite layer; the first light absorption layer comprises a first area and a second area, the first area is provided with a perovskite light absorption block, and the second area is provided with an organic light absorption block.
2. The solar tandem cell according to claim 1, wherein the number of said perovskite light absorption blocks is one, the number of said organic light absorption blocks is plural, and a plurality of said organic light absorption blocks are spaced by one of said perovskite light absorption blocks.
3. The solar laminated cell according to claim 1, wherein the projection of the organic light-absorbing block on the glass substrate is circular.
4. The solar laminate cell of claim 1, wherein each of the organic light-absorbing blocks comprises a donor layer and an acceptor layer stacked correspondingly, and for one of the organic light-absorbing blocks:
the donor layer is a PTB7-Th layer, and the acceptor layer is an IEICO-4F layer;
or, the donor layer is a PTB7-Th layer and the receptor layer is a Y6 layer;
or, the donor layer is a PM6 layer, and the acceptor layer is a Y7 layer;
or, the donor layer is a PM6 layer, and the acceptor layer is a Y6 layer.
5. The solar laminate cell of claim 1, wherein the organic light absorbing block has a thickness of 80nm to 500nm.
6. The solar laminate cell of claim 1, wherein the thickness of the perovskite light absorbing block is 300nm to 600nm.
7. The solar laminate cell of claim 1, wherein the composite layer has a thickness of 10nm to 40nm.
8. The solar laminate cell of claim 1, wherein the thickness of the electrode is between 10nm and 30nm.
9. The solar laminated cell according to claim 1, wherein the organic light absorbing block comprises an acceptor layer and a corresponding donor layer, and the material of the acceptor layer has an absorption edge of 700nm to 1200nm.
10. A cell module comprising the solar cell laminate according to any one of claims 1 to 9.
11. A photovoltaic system comprising the cell assembly of claim 10.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116669441A (en) * | 2023-07-31 | 2023-08-29 | 宁德时代新能源科技股份有限公司 | Solar cell, preparation method thereof, photovoltaic module and photovoltaic device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116669441A (en) * | 2023-07-31 | 2023-08-29 | 宁德时代新能源科技股份有限公司 | Solar cell, preparation method thereof, photovoltaic module and photovoltaic device |
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