CN216597634U - Spiral type laminated perovskite solar cell structure - Google Patents
Spiral type laminated perovskite solar cell structure Download PDFInfo
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- CN216597634U CN216597634U CN202123108744.XU CN202123108744U CN216597634U CN 216597634 U CN216597634 U CN 216597634U CN 202123108744 U CN202123108744 U CN 202123108744U CN 216597634 U CN216597634 U CN 216597634U
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Abstract
The utility model discloses a spiral laminated perovskite solar cell structure. The spiral-type tandem perovskite solar cell structure comprises: the flexible solar cell module comprises a light-transmitting flexible substrate and a plurality of perovskite solar cells formed on a plurality of selected regions of the surface of the flexible substrate, wherein the band gaps of perovskite layers contained in at least two perovskite solar cells are different, and the flexible solar cell module is folded or wound along a specified direction to form a spiral structure, and a gap is formed between any two adjacent structural layers in the spiral structure. According to the spiral laminated perovskite solar cell structure provided by the embodiment of the utility model, the whole volume of the component is smaller, more components can be arranged in the same space, and the power generation efficiency is improved.
Description
Technical Field
The utility model relates to a perovskite solar cell, in particular to a spiral laminated perovskite solar cell structure, and belongs to the technical field of solar cells.
Background
In recent years, with the continuous and intensive research, the perovskite cell has been developed rapidly and rapidly, and the efficiency is increased from the first 3.8% to 25.5%, which is known as "new hope in the photovoltaic field".
Common perovskite battery structures are divided into mesoscopic structures, mesoscopic superstructures, planar n-i-p-type structures and planar p-i-n-type structures, and regardless of the structures, the photoelectric conversion efficiency of the perovskite battery is limited by that the S-Q limit cannot exceed 33%. One way that can be taken to make full use of the solar spectrum is to absorb the solar spectrum in full spectrum using absorbing layers of different band gaps. The ultimate efficiency of a double-layer solar cell can reach 48% by properly adjusting the band gap of the absorption layer.
At present, the perovskite component is mainly based on a hard glass substrate, and the rigid substrate has the problems of large volume and large mass. Meanwhile, the perovskite thin film can be prepared on the flexible substrate simply and easily due to the easy preparation property of the perovskite thin film. Flexible solar cells are more widespread in application than rigid substrate solar cells.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a spiral laminated perovskite solar cell structure to overcome the defects in the prior art.
In order to achieve the purpose of the utility model, the technical scheme adopted by the utility model comprises the following steps:
the embodiment of the utility model provides a spiral type laminated perovskite solar cell structure, which comprises:
the flexible solar cell module comprises a light-transmitting flexible substrate and a plurality of perovskite solar cells formed on a plurality of selected regions of the surface of the flexible substrate, wherein the band gaps of perovskite layers contained in at least two perovskite solar cells are different, and the flexible solar cell module is folded or wound along a specified direction to form a spiral structure, and a gap is formed between any two adjacent structural layers in the spiral structure.
Compared with the prior art, the utility model has the advantages that:
1) according to the spiral laminated perovskite solar cell structure provided by the embodiment of the utility model, a plurality of multi-band-gap perovskite thin films can be simultaneously manufactured and formed, so that the preparation process of the laminated cell is reduced, and the production cost is reduced;
2) according to the spiral laminated perovskite solar cell structure provided by the embodiment of the utility model, the whole volume of the component is smaller, more components can be arranged in the same space, and the power generation efficiency is improved;
3) according to the spiral laminated perovskite solar cell structure provided by the embodiment of the utility model, a plurality of perovskite cells are connected in parallel, so that high current can be increased under the characteristic of keeping the high voltage of the perovskite component, and the power generation power is improved.
Drawings
FIG. 1 is a schematic structural diagram of a spiral-type tandem perovskite solar cell structure provided in an exemplary embodiment of the utility model;
FIG. 2 is a schematic side view of a helical stacked perovskite solar cell structure provided in an exemplary embodiment of the utility model;
fig. 3 is a schematic structural diagram of a flexible solar cell module provided in an exemplary embodiment of the utility model;
fig. 4 is a structural diagram of a spiral-type stacked perovskite solar cell structure provided in an exemplary embodiment of the utility model in an expanded state.
Detailed Description
In view of the deficiencies in the prior art, the inventors of the present invention have made extensive studies and extensive practices to provide technical solutions of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.
The embodiment of the utility model provides a spiral type laminated perovskite solar cell structure, which adopts a light-transmitting flexible substrate, forms a plurality of single-junction perovskite solar cell components with perovskite thin films with different band gaps in different regions of the surface of the light-transmitting flexible substrate, and then folds or curls (winds) the whole thin film component along a specified direction by utilizing the translucence of the flexible substrate and the perovskite thin films to form the laminated perovskite solar cell with a three-dimensional spiral structure. Meanwhile, the open-circuit voltage of the solar cell modules in a single region can be controlled by controlling the number of the perovskite solar cell modules in each region, so that the perovskite solar cell modules can be conveniently connected in parallel, and the high-voltage and high-current perovskite solar cell can be obtained.
The embodiment of the utility model provides a spiral type laminated perovskite solar cell structure, which comprises:
the flexible solar cell module comprises a light-transmitting flexible substrate and a plurality of perovskite solar cells formed on a plurality of selected regions of the surface of the flexible substrate, wherein the band gaps of perovskite layers contained in at least two perovskite solar cells are different, and the flexible solar cell module is folded or wound along a specified direction to form a spiral structure, and a gap is formed between any two adjacent structural layers in the spiral structure.
In a more specific embodiment, a plurality of the perovskite solar cells are arranged in sequence along the direction in which the flexible solar cell assembly is folded or rolled.
In a more specific embodiment, the perovskite layers comprised by a plurality of the perovskite solar cells have different band gaps.
In a more specific embodiment, the band gap of the perovskite layers included in the perovskite solar cells is uniformly decreased in sequence along the direction in which the flexible solar cell assembly is folded or wound.
In a more specific embodiment, the perovskite layer comprised by the perovskite solar cell has a band gap of 1.1-1.7 eV.
In a more specific embodiment, the structural layers of the perovskite solar cell other than the perovskite layer are integrally formed.
In a more specific embodiment, the perovskite solar cell comprises a first electrode layer, an electron transport layer, a perovskite layer, a hole transport layer and a second electrode layer which are sequentially stacked, wherein the first electrode layer or the second electrode layer is formed on the surface of the flexible substrate.
In a more specific embodiment, each of the perovskite solar cells is further electrically connected to a set of extraction electrodes, and a set of the extraction electrodes is electrically connected to the first electrode layer and the second electrode layer, respectively.
In a more specific embodiment, the flexible solar cell module is of a cylindrical structure as a whole.
In a more specific embodiment, the spiral-type stacked perovskite solar cell structure further comprises a light-transmitting encapsulating structure, and the flexible solar cell module is integrally encapsulated in the light-transmitting encapsulating structure.
The technical solution, the implementation process and the principle thereof will be further explained with reference to the accompanying drawings and specific embodiments, and the embodiments of the present invention are mainly used to explain and explain the structure of a spiral-type stacked perovskite solar cell structure provided in the embodiments of the present invention; the flexible substrate used in the embodiments of the present invention and the materials forming each functional structure layer of the perovskite solar cell may be known to those skilled in the art, unless otherwise specified, wherein the thickness of each functional layer and other parameters may be adjusted according to specific requirements, and are not specifically limited and described herein.
Referring to fig. 1 and 2, a spiral-type stacked perovskite solar cell structure includes a flexible solar cell assembly 200, the flexible solar cell assembly 200 includes a light-transmitting flexible substrate 240 and a plurality of perovskite solar cells 210/220/230 formed on a plurality of selected regions of a surface of the flexible substrate 240, at least two perovskite solar cells include perovskite layers (i.e., perovskite thin films, the following is the same) having different band gaps, and the flexible solar cell assembly 200 has a three-dimensional spiral structure formed by folding or winding in a specific direction, and a gap is formed between any two adjacent structural layers in the spiral structure.
In this embodiment, referring to fig. 3 and 4, a plurality of the perovskite solar cells 210/220/230 are sequentially arranged along the direction in which the flexible solar cell assembly 200 is folded or wound, for example, the flexible solar cell assembly 200 may be folded or wound along the length direction thereof, and it can be understood that the three-dimensional spiral structure of the flexible solar cell assembly 200 may be a uniform spiral structure or may be non-uniform; of course, the shape of each spiral may be generally arcuate, in particular circular, or may be square.
It should be noted that, when the spiral structure is formed by winding, the flexible solar cell module 200 is a cylindrical structure as a whole; when the spiral structure is formed in a folding manner, the flexible solar cell module 200 has a prismatic structure as a whole; embodiments of the present invention preferably form a circular, spiral-shaped structure of the flexible solar cell assembly 200.
In this embodiment, the bandgaps of the plurality of perovskite layers included in the plurality of perovskite solar cells 210/220/230 are different from each other, and preferably, the bandgaps of the plurality of perovskite layers included in the plurality of perovskite solar cells 210/220/230 are sequentially and uniformly decreased in the direction in which the flexible solar cell module 200 is folded or wound.
In this embodiment, the perovskite layer included in the perovskite solar cell 210/220/230 has a band gap of 1.1 to 1.7eV, for example, if two perovskite solar cells are formed on the surface of the light-transmissive flexible substrate 240, the band gap of the perovskite layer included in one perovskite solar cell is 1.7eV, and the band gap of the perovskite layer included in the other perovskite solar cell is 1.1 eV; if three perovskite solar cells are formed on the surface of the light-transmitting flexible substrate 240, the band gaps of perovskite layers contained in the three perovskite solar cells are 1.7eV, 1.4eV and 1.1eV respectively; if more perovskite solar cells are formed on the surface of the light-transmitting flexible substrate 240, the band gaps of the perovskite layers included in the perovskite solar cells decrease in sequence according to the spectral energy, and the decreasing trend may be a decreasing trend in the direction in which the flexible solar cell assembly 200 is folded or wound.
In the present embodiment, the structural layers of the plurality of perovskite solar cells 210/220/230 except for the perovskite layer are integrally formed, but of course, the plurality of perovskite solar cells 210/220/230 may be independently provided, and the plurality of perovskite solar cells 210/220/230 may be connected in series and parallel.
In this embodiment, the structure of the perovskite solar cell 210/220/230 in the embodiment of the utility model may be any one of a mesostructure, a mesosuperstructure, a planar n-i-p type and a planar p-i-n type structure, without any limitation, and the perovskite component of the perovskite layer may be MAxFAyCs1-x-yPbzSn1-z(IaBrbCl1-a-b)3，MAPbI3，FAxCsyMA1-x-yPb(IaBrbCl1-a-b)3And the like.
In this embodiment, the perovskite solar cell 210/220/230 includes a first electrode layer, an electron transport layer, a perovskite layer, a hole transport layer, and a second electrode layer, which are sequentially stacked, wherein the first electrode layer or the second electrode layer is formed on the surface of the flexible substrate 240.
In this embodiment, the perovskite solar cell 210/220/230 may be a device of a forward structure or a reverse structure; for example, the perovskite solar cell with the forward structure comprises a conductive substrate/an electron transport layer// a perovskite layer// a hole transport layer/a metal electrode which are sequentially formed, wherein the conductive substrate can be any one of FTO conductive glass, ITO conductive glass, FTO conductive plastic and ITO conductive plastic, the thickness of the FTO conductive glass is about 500nm, and the thickness of the ITO conductive plastic is about 300-400 nm; the electron transport layer is made of TiO2、ZnO2、SnO2The thickness of the electron transport layer is about 10 to 50 nm; the perovskite layer is made of MAPbI3、FAxCsyMA1-x-yPb(IaBrbCl1-a-b)3And MA has the structural formula CH3NH3 +FA has the structural formula of CH4N2+The thickness of the perovskite layer is 300-1000 nm; the material of the hole transport layer is Spiro-OMeTAD (2,2',7,7' -tetra [ N, N-di (4-methoxyphenyl) amino)]-9,9' -spirobifluorene), PEDOT PSS, P3Any one of HT, PTAA and PCDTBT, wherein the thickness of the hole transport layer is 300-600 nm; the metal electrode is any one of Ag, Al and Au, and the thickness of the hole transport layer is about 100-200 nm.
The perovskite solar cell structure with the reverse structure comprises a conductive substrate, a hole transport layer, a perovskite layer, an electron transport layer and a metal electrode which are sequentially formed, wherein the conductive substrate can be one of FTO conductive glass, ITO conductive glass, FTO conductive plastic and ITO conductive plastic, the thickness of the FTO conductive glass is about 500nm, the thickness of the ITO conductive plastic is about 300-400nm, the material of the hole transport layer is NiOx, and the thickness of the hole transport layer is about 15-40 nm; the perovskite layer is made of MAPbI3And MA has the structural formula CH3NH3 +The thickness of the perovskite layer is 300-1000nm, and the material of the electron transmission layer is PCBM and TiOx、SnO2And ZnSnOxThe thickness of the electron transport layer is about 20-50nm, the material of the metal electrode is any one of Ag, Al and Au, and the thickness of the metal electrode is about 100-200 nm.
In a specific preparation process, the perovskite solar cell layers can be prepared by a method known to those skilled in the art, for example, a physical vapor deposition method, an evaporation method or a sputtering method can be used to prepare a conductive substrate, an electron transport layer and a hole transport layer can be formed by any one of methods such as spin coating, spray coating or blade coating, a longitudinal coating method can be used to prepare a perovskite layer on a plurality of selected areas of the surface of the substrate at the same time, and a vacuum evaporation method or a vacuum sputtering method can be used to prepare and form the metal electrode.
In this embodiment, each of the perovskite solar cells 210/220/230 is further electrically connected to a set of extraction electrodes 300, each set of extraction electrodes includes two extraction electrodes, and the two extraction electrodes included in the same extraction electrode are respectively electrically connected to the first electrode layer and the second electrode layer of a perovskite solar cell 210/220/230.
In this embodiment, the helical stacked perovskite solar cell structure further includes a light-transmitting encapsulation structure 400, the flexible solar cell module 200 is entirely encapsulated in the light-transmitting encapsulation structure 400, the structure of the encapsulation structure is adapted to the flexible solar cell module 200, and the encapsulation structure may be formed by using materials and manufacturing processes known to those skilled in the art, which are not specifically limited herein.
According to the spiral laminated perovskite solar cell structure provided by the embodiment of the utility model, perovskite thin film components with different band gaps are formed in different regions on the surface of the same flexible substrate, and the output voltage of the whole region can be controlled by controlling the number of perovskite cells in different regions, so that the voltages in the regions are matched;
the spiral laminated perovskite solar cell structure provided by the embodiment of the utility model has the advantages of smaller integral volume and more convenience in use and installation, and the spiral laminated perovskite solar cell structure provided by the embodiment of the utility model has the advantages of simple structure, simple manufacturing process and reduced production cost.
It should be understood that the above-mentioned embodiments are merely illustrative of the technical concepts and features of the present invention, which are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and therefore, the protection scope of the present invention is not limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A spiral-type stacked perovskite solar cell structure, comprising:
the flexible solar cell module comprises a light-transmitting flexible substrate and a plurality of perovskite solar cells formed on a plurality of selected regions of the surface of the flexible substrate, wherein the band gaps of perovskite layers contained in at least two perovskite solar cells are different, and the flexible solar cell module is folded or wound along a specified direction to form a spiral structure, and a gap is formed between any two adjacent structural layers in the spiral structure.
2. The spiral-type stacked perovskite solar cell structure of claim 1, wherein: the plurality of perovskite solar cells are arranged in sequence along the direction in which the flexible solar cell module is folded or wound.
3. The spiral-type stacked perovskite solar cell structure of claim 1 or 2, wherein: the band gaps of the perovskite layers included in the perovskite solar cells are different.
4. The spiral-type stacked perovskite solar cell structure of claim 3, wherein: the band gaps of the perovskite layers contained in the perovskite solar cells are sequentially and uniformly decreased along the direction in which the flexible solar cell assembly is folded or wound.
5. The spiral-type stacked perovskite solar cell structure of claim 4, wherein: the perovskite layer contained in the perovskite solar cell has a band gap of 1.1-1.7 eV.
6. The spiral-type stacked perovskite solar cell structure of claim 1, wherein: the structural layers of the perovskite solar cell except the perovskite layer are integrally formed.
7. The spiral-type stacked perovskite solar cell structure of claim 1 or 6, wherein: the perovskite solar cell comprises a first electrode layer, an electron transport layer, a perovskite layer, a hole transport layer and a second electrode layer which are sequentially stacked, wherein the first electrode layer or the second electrode layer is formed on the surface of the flexible substrate.
8. The spiral-type stacked perovskite solar cell structure of claim 7, wherein: each perovskite solar cell is also electrically connected with a group of extraction electrodes, and the group of extraction electrodes are respectively electrically connected with the first electrode layer and the second electrode layer.
9. The spiral-type stacked perovskite solar cell structure of claim 1, wherein: the flexible solar cell module is of a cylindrical structure as a whole.
10. The spiral-wound laminated perovskite solar cell structure of claim 1, further comprising a light-transmissive encapsulation structure, the flexible solar cell assembly being integrally encapsulated within the light-transmissive encapsulation structure.
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