CN218451112U - Four-end perovskite crystal silicon laminated solar cell - Google Patents
Four-end perovskite crystal silicon laminated solar cell Download PDFInfo
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- CN218451112U CN218451112U CN202221236555.2U CN202221236555U CN218451112U CN 218451112 U CN218451112 U CN 218451112U CN 202221236555 U CN202221236555 U CN 202221236555U CN 218451112 U CN218451112 U CN 218451112U
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Abstract
The application discloses four end perovskite crystal silicon tandem solar cell belongs to solar motor technical field, and it includes crystal silicon battery structure, perovskite battery structure and insulating layer. The insulating layer is located between crystal silicon battery structure and perovskite battery structure, and crystal silicon battery and perovskite battery structure parallel connection. The utility model discloses a four end perovskite crystal silicon tandem solar cell can improve photovoltaic power plant generated energy, in addition, compare in setting up perovskite battery structure alone, this kind of four end perovskite crystal silicon tandem solar cell's manufacturing cost is lower.
Description
Technical Field
The utility model relates to a solar electric machine technical field particularly, relates to a four end perovskite crystal silicon tandem solar cell.
Background
Perovskite solar cells (perovskite solar cells) are solar cells using perovskite organic metal halide semiconductors as light absorbing materials, and belong to third generation solar cells, which are also called new concept solar cells. The perovskite solar cell is a novel solar cell technology which takes perovskite crystals as light absorption materials. Compared with the crystalline silicon battery which needs high-purity silicon, the perovskite battery only needs the material with the purity of 90 percent, the low-temperature process can reduce the energy consumption, and the perovskite material consumed by the perovskite component in unit area is far lower than that of the crystalline silicon component.
The existing crystalline silicon solar photovoltaic module has power attenuation along with the increase of the operation period, and cannot reach the design capacity, and the cost is greatly increased by independently adding the perovskite solar module.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a four end perovskite crystal silicon tandem solar cell to improve foretell problem.
The utility model provides a technical scheme that above-mentioned technical problem adopted is:
based on foretell purpose, the utility model discloses a four end perovskite crystal silicon tandem solar cell, include:
the solar cell comprises a crystalline silicon cell structure, a solar cell structure and a solar cell, wherein the crystalline silicon cell structure comprises a crystalline silicon lower electrode, a silicon nitride layer, P/N type silicon, a P/N type layer, an antireflection film layer and a crystalline silicon upper electrode which are sequentially arranged;
the perovskite battery structure is connected with the crystalline silicon battery structure in parallel, the perovskite battery structure comprises a perovskite lower electrode, a first transmission layer, a perovskite light absorption layer, a second transmission layer and a perovskite upper electrode which are sequentially arranged, the first transmission layer faces the antireflection film layer, the perovskite lower electrode is connected with the crystalline silicon lower electrode in parallel, and the perovskite upper electrode is connected with the crystalline silicon upper electrode in parallel; and
the insulation structure comprises a flexible substrate film, and the flexible substrate film is arranged between the first transmission layer and the antireflection film layer.
Optionally: the area of the flexible substrate film is larger than the cross-sectional area of the perovskite battery structure.
Optionally: the flexible substrate film is made of one or more of PEEK, PET and PTFE.
Optionally: one of the first transport layer and the second transport layer is an electron transport layer, and the other is a hole transport layer.
Optionally: the crystal silicon battery structure sets up to a plurality ofly, a plurality of the crystal silicon battery structure is parallelly connected or series connection.
Optionally: the perovskite battery structure sets up to a plurality ofly, a plurality of the perovskite battery structure connects in parallel.
Optionally: the energy gap of the perovskite cell structure is 1.54eV-1.73eV.
Optionally: the forbidden band width of the crystalline silicon battery structure is 1.12eV.
Optionally: the crystalline silicon cell structure is located below the perovskite cell structure.
Optionally: the number of the crystalline silicon lower electrodes is larger than that of the crystalline silicon upper electrodes.
Compared with the prior art, the utility model discloses the beneficial effect who realizes is:
the utility model discloses a four end perovskite crystal silicon tandem solar cell can improve photovoltaic power plant generated energy, in addition, compare in setting up perovskite battery structure alone, this kind of four end perovskite crystal silicon tandem solar cell's manufacturing cost is lower.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 shows a schematic diagram of a four-terminal perovskite crystalline silicon tandem solar cell disclosed in an embodiment of the present invention.
In the figure:
the solar cell comprises a 110-crystalline silicon cell structure, a 111-crystalline silicon lower electrode, a 112-silicon nitride layer, 113-P/N type silicon, a 114-P/N type layer, a 115-antireflection film layer, a 116-crystalline silicon upper electrode, a 120-perovskite cell structure, a 121-perovskite lower electrode, a 122-first transmission layer, a 123-perovskite light absorption layer, a 124-second transmission layer, a 125-perovskite upper electrode, a 130-insulation structure and a 131-flexible substrate film.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments and drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as disclosed in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example (b):
the inventor finds out in the research that: crystalline silicon batteries are approaching to the theoretical efficiency limit, and perovskite batteries and crystalline silicon batteries form a laminated battery, so that the photoelectric conversion efficiency of more than 30% can be realized, and the prospect is promising.
The perovskite/crystalline silicon tandem solar cell absorbs different sunlight spectrums by utilizing different band gaps, and the conversion efficiency of the cell is improved. The perovskite cell and the silicon cell are overlapped from outside to inside according to the sequence of the energy gaps from large to small, light with short wavelength is absorbed by the perovskite solar cell with wide band gap at the outermost side, when the forbidden band width of the perovskite is 1.55eV, the perovskite solar cell can absorb photons with the wavelength less than 800nm, light with longer wavelength can be transmitted into the perovskite solar cell with narrow band gap of 1.12eV, and the silicon cell can absorb photons with the wavelength less than 1100 nm. When the two are combined into a laminated cell, the absorption spectra of the two are complementary, so that the light energy can be converted into electric energy to the maximum extent, the utilization rate of the solar spectrum, the performance and the stability of the cell are improved, and the preparation cost is reduced.
The perovskite/crystalline silicon tandem solar cell structure mainly comprises 3 types, namely a mechanical stacking structure, an integrated structure and a spectrum separation structure. The integrated laminate cell requires current matching between the top and bottom cells and therefore requires different optical designs for good compatibility of the bottom and top cells. The mechanically stacked solar cell is also called a four-terminal stacked structure, and means that a top cell and a bottom cell are separately prepared, wherein a perovskite cell with a large band gap is the top cell, a silicon cell with a small band gap is the bottom cell, and then the perovskite cell is directly stacked on the silicon cell, so that the perovskite solar cell and the crystalline silicon cell form a parallel circuit, current matching is not needed, and the implementation is easy. However, in the four-terminal tandem solar cell, an insulating layer needs to be formed between perovskite and crystalline silicon, so that the contact short circuit of an upper cell and a lower cell is avoided. If the perovskite layer is prepared on the glass substrate, the light transmittance is affected because the glass is thicker. While increasing the cost of the device.
Based on the above findings, referring to fig. 1, the embodiment of the present invention discloses a four-terminal perovskite crystalline silicon tandem solar cell, which includes a crystalline silicon cell structure 110, a perovskite cell structure 120, and an insulating layer. The insulating layer is located between the crystalline silicon cell structure 110 and the perovskite cell structure 120, the crystalline silicon cell being connected in parallel with the perovskite cell structure 120.
On the one hand, the power generation capacity of the photovoltaic power station can be improved. As the power attenuation exists along with the increase of the operation period of the crystalline silicon solar photovoltaic module and the design capacity cannot be reached, the flexible semitransparent thin film perovskite device is laid and fixed on the crystalline silicon solar photovoltaic module, the attenuation of the crystalline silicon solar photovoltaic module can be compensated, the design capacity level of the crystalline silicon solar photovoltaic module can be reached under the condition that the system cost is not changed, and the electric quantity of a power station is increased.
On the other hand, this may also reduce the cost of the perovskite photovoltaic system. When the perovskite flexible semitransparent device and the existing crystalline silicon photovoltaic system component are laid in a laminated mode, compared with an independent perovskite solar cell, a photovoltaic support does not need to be independently established, the crystalline silicon photovoltaic component support is utilized, the support and construction cost of the perovskite component in a photovoltaic system are saved, and the photovoltaic system cost of the perovskite cell is further reduced.
The silicon crystal cell structure 110 has a forbidden bandwidth of 1.12eV, and adopts a P/N type silicon crystal solar cell, which may be one of a P/N type PERC cell, an N type Tpcon cell or an HJT cell as a bottom cell.
Referring to fig. 1, the crystalline silicon cell structure 110 includes a crystalline silicon lower electrode 111, a silicon nitride layer 112, P/N type silicon 113, a P/N type layer 114, an anti-reflection film layer 115, and a crystalline silicon upper electrode 116, which are sequentially disposed.
The perovskite solar cell adopts CH3NH3PbI3 or CSPbI3 with the forbidden band width of 1.54eV-1.73eV as a top cell.
The perovskite cell structure 120 is disposed in parallel with the crystalline silicon cell structure 110. Referring to fig. 1, the perovskite battery structure 120 includes a perovskite lower electrode 121, a first transmission layer 122, a perovskite light absorption layer 123, a second transmission layer 124, and a perovskite upper electrode 125, which are sequentially arranged. The first transmission layer 122 is disposed toward the antireflection film layer 115, the perovskite lower electrode 121 is disposed in parallel with the crystalline silicon lower electrode 111, and the perovskite upper electrode 125 is disposed in parallel with the crystalline silicon upper electrode 116.
In the production and processing of the perovskite battery structure 120 and the insulating structure 130, the two can be processed together, with better efficiency and more compact structure.
The insulating structure 130 comprises a flexible substrate film 131, and the flexible substrate film 131 is made of one or more materials selected from PEEK, PET and PTFE.
ITO or AZO is prepared on the flexible substrate film 131 by adopting a radio frequency magnetron sputtering method at a low temperature of 110-150 ℃ to be used as a perovskite lower electrode 121 of the perovskite battery structure 120.
A first transmission layer 122 is prepared on the prepared perovskite lower electrode 121 by adopting a blade coating method, a spraying method and the like, and then a perovskite light absorption layer 123 and a second transmission layer 124 are sequentially prepared on the first transmission layer 122 by adopting the same method. Finally, the transparent silver electrode is used as the perovskite upper electrode 125 to complete the preparation of the perovskite solar cell structure and the insulation structure 130.
One of the first transport layer 122 and the second transport layer 124 is an electron transport layer, and the other is a hole transport layer. In this example, low-temperature SnO2 was used as the electron transport layer, and an organic small-molecule material Spro-meadd was used as the hole transport layer. CH3NH3PbI3 or CSPbI3 is used as the perovskite light absorption layer 123, and Ag nanowires, carbon nanotubes, graphene or conductive polymers are used as the transparent perovskite upper electrode 125.
The SnO2 electron transport layer is prepared by a coating method or a spraying method, the hole transport layer is prepared by a coating method or a spraying method, and the perovskite light absorption layer 123 is prepared by a coating method or a slit coating method. In the fabrication of the transparent perovskite upper electrode 125, the transparent electrode material is first dispersed in a solution, and then the transparent perovskite upper electrode 125 is prepared step by using a process such as spray coating, spin coating, ink jet printing, roll-to-roll, and the like, and is preferably fabricated by a roll-to-roll process.
Finally, the prepared crystalline silicon battery structure 110 is placed below the perovskite battery structure 120 prepared on the flexible substrate film 131, and the electrodes of the crystalline silicon battery structure 110 and the perovskite battery structure 120 are connected in parallel. And then packaging by adopting glass, EVA, a transparent back plate and the like.
Before packaging, the flexible substrate film 131 is fixed to the edge of the perovskite battery structure 120, so that the flexible substrate film 131 can be prevented from shrinking in the packaging process, at the moment, the area of the flexible substrate film 131 needs to be larger than the cross-sectional area of the perovskite battery structure 120, and the flexible substrate film 131 can be better ensured to wrap and fix the edge of the perovskite battery structure 120. The perovskite cell structure 120 made of glass, EVA, transparent back plate and other packaging materials can avoid water vapor permeation in the use process.
After the perovskite cell structure 120 and the flexible substrate film 131 are manufactured and packaged, the perovskite cell structure 120 and the flexible substrate film 131 can be directly laid on the existing crystalline silicon cell structure 110, the perovskite cell structure 120 can absorb photons with the wavelength of below 800nm, and the crystalline silicon cell structure 110 can absorb photons with the wavelength of below 1100nm, so that the basic maximization of not increasing the system cost is realized, the light energy is converted into the electric energy, and the system power generation amount is increased.
In addition, the perovskite cell structure 120 can be laid on a new high-efficiency crystalline silicon photovoltaic module to form a laminated structure, and the absorption power of the laminated structure to photons is increased, so that the number of components in links of a power station is reduced, the cost of a photovoltaic support is reduced, and the cost of a photovoltaic system is further reduced.
In the present embodiment, various methods may be employed in mounting the crystalline silicon cell structure 110 and the perovskite cell structure 120. For example, the plurality of crystalline silicon cell structures 110 are provided in plurality, and the plurality of crystalline silicon cell structures 110 are connected in parallel or in series, and the plurality of perovskite cell structures 120 are provided in plurality, and the plurality of perovskite cell structures 120 are connected in parallel. When the crystalline silicon cell structure 110 is connected with the perovskite cell structure 120, one perovskite cell can be matched with a plurality of crystalline silicon cell structures 110 at the same time, and the area of the perovskite cell structure 120 needs to be larger; a plurality of perovskite cell structures 120 may also be matched with the same crystalline silicon cell structure 110, and at this time, the area of the perovskite cell structure 120 needs to be set smaller; in addition, the perovskite cell structure 120 and the crystalline silicon cell structure 110 can be matched in a one-to-one manner, and at this time, the area of the perovskite cell structure 120 only needs to be equal to that of the crystalline silicon cell structure 110.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. A four-terminal perovskite crystalline silicon tandem solar cell, comprising:
the solar cell comprises a crystalline silicon cell structure, a solar cell structure and a solar cell, wherein the crystalline silicon cell structure comprises a crystalline silicon lower electrode, a silicon nitride layer, P/N type silicon, a P/N type layer, an antireflection film layer and a crystalline silicon upper electrode which are sequentially arranged;
the perovskite battery structure is connected with the crystalline silicon battery structure in parallel, the perovskite battery structure comprises a perovskite lower electrode, a first transmission layer, a perovskite light absorption layer, a second transmission layer and a perovskite upper electrode which are sequentially arranged, the first transmission layer faces the antireflection film layer, the perovskite lower electrode is connected with the crystalline silicon lower electrode in parallel, and the perovskite upper electrode is connected with the crystalline silicon upper electrode in parallel; and
the insulation structure comprises a flexible substrate film, and the flexible substrate film is arranged between the first transmission layer and the antireflection film layer.
2. The four-terminal perovskite crystalline silicon tandem solar cell of claim 1, wherein the area of the flexible substrate thin film is larger than the cross-sectional area of the perovskite cell structure.
3. The four-terminal perovskite crystalline silicon tandem solar cell of claim 1, wherein one of the first and second transport layers is an electron transport layer and the other is a hole transport layer.
4. The four-terminal perovskite crystalline silicon tandem solar cell according to any one of claims 1 to 3, wherein the crystalline silicon cell structure is provided in plurality, and a plurality of the crystalline silicon cell structures are connected in parallel or in series.
5. The four-terminal perovskite crystalline silicon tandem solar cell according to any one of claims 1 to 3, wherein the perovskite cell structure is provided in plurality, and a plurality of the perovskite cell structures are connected in parallel.
6. The four-terminal perovskite crystalline silicon tandem solar cell of claim 1, wherein the perovskite cell structure has a forbidden band width of 1.54eV to 1.73eV.
7. The four-terminal perovskite crystalline silicon tandem solar cell of claim 1, wherein the crystalline silicon cell structure has a forbidden band width of 1.12eV.
8. The four-terminal perovskite crystalline silicon tandem solar cell of claim 1, wherein the crystalline silicon cell structure is located below the perovskite cell structure.
9. The four-terminal perovskite crystalline silicon tandem solar cell of claim 1, wherein the number of crystalline silicon lower electrodes is greater than the number of crystalline silicon upper electrodes.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117998956A (en) * | 2024-04-03 | 2024-05-07 | 深圳现象光伏科技有限公司 | Wide band gap perovskite solar cell and laminated solar cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117998956A (en) * | 2024-04-03 | 2024-05-07 | 深圳现象光伏科技有限公司 | Wide band gap perovskite solar cell and laminated solar cell |
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