Flexible perovskite solar cell and electronic device
By using multiple metal wires woven into leads and a mesh-like interwoven structure, combined with conductive adhesive for fixing and sealing, the problem of lead breakage in flexible perovskite solar cells under repeated bending was solved, thus improving the stability and current collection efficiency of the cells.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGYIN (JIANGSU) NEW ENERGY CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-06-23
Smart Images
Figure CN224402033U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of perovskite solar cell technology, and in particular to a flexible perovskite solar cell and electronic device. Background Technology
[0002] Perovskite solar cells (PSCs) are considered one of the most promising technologies among various photovoltaic devices due to their high efficiency, low cost, and ease of fabrication. Flexible perovskite solar cells, compared to rigid perovskite solar cells, are smaller and more flexible, making them more suitable for practical applications.
[0003] Currently, flexible perovskite solar cells still lag behind rigid perovskite solar cells. Under large deformations or repeated bending, the conductive tape used to lead out electrodes inside flexible cells will crack or even break, affecting the stability of the entire cell. Utility Model Content
[0004] The main objective of this invention is to propose a flexible perovskite solar cell and electronic device, which aims to reduce the probability of electrode lead breakage in order to avoid the impact of lead breakage on the stability of the cell.
[0005] To achieve the above objectives, the flexible perovskite solar cell proposed in this utility model includes a flexible substrate layer, a first electrode layer, a first transport layer, a perovskite functional layer, a second transport layer, and a second electrode layer stacked sequentially.
[0006] Of the first transport layer and the second transport layer, one is a hole transport layer and the other is an electron transport layer;
[0007] The flexible perovskite solar cell further includes a first lead and a second lead, wherein a first end of the first lead is connected to the first electrode layer and a second end of the first lead extends beyond the flexible substrate layer; a first end of the second lead is connected to the second electrode layer and a second end of the second lead extends beyond the flexible substrate layer.
[0008] Both the first lead and the second lead are formed by braiding multiple metal wires.
[0009] In one embodiment, both the first lead and the second lead include multiple first wire bundles and multiple second wire bundles, which are interwoven in a mesh-like manner, and both the first wire bundle and the second wire bundle include multiple metal wires.
[0010] In one embodiment, the number of metal wires in the first wire harness is equal to the number of metal wires in the second wire harness.
[0011] In one embodiment, the number of metal wires in the first wire harness and the number of metal wires in the second wire harness are both no less than four.
[0012] In one embodiment, the number of the first wire harness is equal to the number of the second wire harness.
[0013] In one embodiment, the number of the first wire harness and the number of the second wire harness are both no less than 6.
[0014] In one embodiment, the first end of the first lead is fixedly connected to the first electrode layer by conductive adhesive, conductive tape, or metal sponge tape.
[0015] The first end of the second lead is fixedly connected to the second electrode layer by conductive adhesive, conductive tape, or metal sponge tape.
[0016] In one embodiment, the flexible perovskite solar cell further includes a flexible encapsulation layer and a sealant. The flexible encapsulation layer is disposed over the second electrode, and the sealant is disposed between the flexible encapsulation layer and the flexible substrate layer. The flexible encapsulation layer, the sealant, and the flexible substrate layer enclose a sealed cavity, and the first electrode layer, the first transport layer, the perovskite functional layer, the second transport layer, and the second electrode layer are all located within the sealed cavity.
[0017] The second end of the first lead and the second end of the second lead both extend out of the sealing cavity, and the sealant respectively wraps a portion of the first lead and a portion of the second lead.
[0018] In one embodiment, the flexible perovskite solar cell is laminated.
[0019] This invention also proposes an electronic device, including an electronic device and a flexible perovskite solar cell as described above, wherein the electronic device and the flexible perovskite solar cell are electrically connected.
[0020] In the technical solution of this utility model, the flexible perovskite solar cell is formed by weaving multiple metal wires into the first and second leads. This weaving structure gives the first and second leads good flexibility, which can adapt to the bending and deformation of the battery. Therefore, the first and second leads are not easy to break under large deformation or repeated bending of the battery, thereby reducing the probability of electrode lead breakage and avoiding the impact of lead breakage on the stability of the battery. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of a flexible perovskite solar cell according to an embodiment of the present invention.
[0023] Figure 2 for Figure 1 Front view of a flexible perovskite solar cell.
[0024] Figure 3 for Figure 1 A cross-sectional view along the middle BB.
[0025] Figure 4 for Figure 1 A schematic diagram of the first lead wire stretched along its width direction.
[0026] Figure 5 A schematic diagram of the electronic device provided by this utility model.
[0027] Explanation of icon numbers:
[0028] 1000, Electronic device; 300, Electronic device; 100, Flexible perovskite solar cell; 10, Flexible substrate layer; 20, First electrode layer; 30, First transport layer; 40, Perovskite functional layer; 50, Second transport layer; 60, Second electrode layer; 70, First lead; 71, First wire harness; 72, Second wire harness; 80, Second lead; 90, Flexible encapsulation layer; 91, Sealant; 100a, Sealing cavity.
[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0031] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0033] This invention proposes a flexible perovskite solar cell.
[0034] Please see Figures 1 to 3In one embodiment of this invention, the flexible perovskite solar cell 100 includes a flexible substrate layer 10, a first electrode layer 20, a first transport layer 30, a perovskite functional layer 40, a second transport layer 50, and a second electrode layer 60 stacked sequentially. The flexible substrate layer 10 can be made of PET (polyethylene terephthalate), PVDF (polyvinylidene difluoride), or other effective flexible materials. Both the first electrode layer 20 and the second electrode layer 60 serve a conductive function. In this embodiment, the first electrode layer 20 uses an ITO (Indium Tin Oxide) transparent electrode; in another embodiment, the first electrode layer 20 can also use an FTO (Fluorine-doped Tin Oxide) transparent electrode; in other embodiments, the first electrode layer 20 can also use other effective transparent electrodes. In this embodiment, the second electrode layer 60 uses a metal electrode, such as gold or silver; in another embodiment, the second electrode layer 60 can also use an ITO (Indium Tin Oxide) transparent electrode; in other embodiments, the second electrode layer 60 can also use other effective conductive electrodes. Specifically, in this embodiment, when light irradiates the perovskite functional layer 40, the perovskite material absorbs incident photons with energy greater than its band gap, generating excitons (i.e., electron-hole pairs). Due to the low exciton binding energy of the perovskite material, the excitons rapidly dissociate into free electrons and holes. Electrons and holes are transported through the electron transport layer and hole transport layer, respectively. Holes are collected by the first electrode layer 20, while electrons are collected by the second electrode layer 60. Through an external circuit, the formation of current by electrons and holes generates electrical energy.
[0035] Of the first transport layer 30 and the second transport layer 50, one is a hole transport layer and the other is an electron transport layer. For example, if the first transport layer 30 transports electrons, then the second transport layer 50 transports holes. If the first transport layer 30 transports holes, then the second transport layer 50 transports electrons. In one embodiment, the first transport layer 30 can be an electron transport layer (ETL), and the second transport layer 50 can be a hole transport layer (HTL). In another embodiment, the first transport layer 30 can be a hole transport layer, and the second transport layer 50 can be an electron transport layer. It should be noted that the electron transport layer material can be titanium dioxide (TiO2), zinc oxide (ZnO), or organic materials such as C. 60Or other materials that can effectively transport electrons. The hole transport layer material can be nickel oxide (NiO), or Spiro-OMeTAD (2,2′,7,7′-tetrakis[(N,N-di(4-methoxyphenyl)amino)]-9,9′-spirodifluorene), or other materials that can effectively transport holes.
[0036] The flexible perovskite solar cell 100 also includes a first lead 70 and a second lead 80. A first end of the first lead 70 is connected to a first electrode layer 20, and a second end of the first lead 70 extends beyond the flexible substrate layer 10. A first end of the second lead 80 is connected to a second electrode layer 60, and a second end of the second lead 80 extends beyond the flexible substrate layer 10. Both the first lead 70 and the second lead 80 are formed by braiding multiple metal wires.
[0037] Understandably, both the first lead 70 and the second lead 80 are formed by braiding multiple metal wires. This braiding structure gives the lead good flexibility, enabling it to adapt to the bending and deformation of the flexible substrate 10. At the same time, the multiple metal wires increase the conductive path, improving the conductivity and reliability of the first lead 70 and the second lead 80, and reducing the risk of lead failure due to the breakage of a single metal wire.
[0038] Furthermore, the flexible perovskite solar cell 100 is formed by weaving multiple metal wires into the first lead 70 and the second lead 80. This weaving structure gives the first lead 70 and the second lead 80 good flexibility, which can adapt to the bending and deformation of the cell. Therefore, the first lead 70 and the second lead 80 are not easy to break under large deformation or repeated bending of the cell, thereby reducing the probability of electrode lead breakage and avoiding the impact of lead breakage on the stability of the cell.
[0039] Please refer to Figure 4 In one embodiment of the present invention, the first lead 70 and the second lead 80 each include multiple first wire bundles 71 and multiple second wire bundles 72, which are interwoven in a mesh-like manner, and each of the first wire bundles 71 and the second wire bundles 72 includes multiple metal wires.
[0040] Understandably, the interwoven mesh structure further enhances the flexibility and strength of the leads, allowing them to disperse stress through deformation of the mesh structure when subjected to external forces, thus preventing breakage caused by localized stress concentration. Simultaneously, the mesh structure increases the contact area between the leads and the electrode layer, which is beneficial for improving current collection efficiency.
[0041] Please refer to Figure 4In one embodiment of this invention, the number of metal wires in the first wire harness 71 is equal to the number of metal wires in the second wire harness 72. This arrangement allows the first wire harness 71 and the second wire harness 72 to have uniform specifications, facilitating mass production.
[0042] Please refer to Figure 4 In one embodiment of this utility model, the number of metal wires in the first wire harness 71 and the number of metal wires in the second wire harness 72 are both no less than four. This arrangement ensures sufficient conductivity and structural strength. It should be noted that the number of metal wires in the first wire harness 71 and the second wire harness 72 can be four, five, six, seven, eight, nine, ten, eleven, etc.
[0043] Please refer to Figure 1 and Figure 4 In one embodiment of this invention, the number of first wire bundles 71 and the number of second wire bundles 72 are equal. This design makes the structure of the first lead 70 and the second lead 80 more symmetrical and the stress more even.
[0044] Please refer to Figure 1 In one embodiment of this utility model, the number of first wire bundles 71 and the number of second wire bundles 72 are both no less than 6. This arrangement allows for a denser mesh structure, further improving the flexibility and conductivity of the first lead 70 and the second lead 80. It should be noted that the number of first wire bundles 71 and the number of second wire bundles 72 can be 6, 7, 8, 9, 10, 11, 12, 13, etc.
[0045] Please refer to Figure 1 and Figure 3 In one embodiment of this utility model, the first end of the first lead 70 is fixedly connected to the first electrode layer 20 by conductive adhesive, conductive tape, or metal sponge tape. The first end of the second lead 80 is fixedly connected to the second electrode layer 60 by conductive adhesive, conductive tape, or metal sponge tape.
[0046] Understandably, conductive adhesive, conductive tape, or metal sponge tape can effectively fix the first end of the first lead 70 to the first electrode layer 20 and fix the first end of the second lead 80 to the second electrode layer 60, thereby improving the reliability of the connection between the first lead 70 and the first electrode layer 20 and the second lead 80 and the second electrode layer 60. It is also simple and convenient to operate and helps to improve production efficiency.
[0047] It should be noted that conductive adhesive, conductive tape, and metal sponge tape are all materials based on existing technology.
[0048] Please refer to Figure 1 and Figure 3In one embodiment of the present invention, the flexible perovskite solar cell 100 further includes a flexible encapsulation layer 90 and a sealant 91. The flexible encapsulation layer 90 is disposed over the second electrode, and the sealant 91 is disposed between the flexible encapsulation layer 90 and the flexible substrate layer 10. The flexible encapsulation layer 90, the sealant 91, and the flexible substrate layer 10 enclose a sealed cavity 100a. The first electrode layer 20, the first transport layer 30, the perovskite functional layer 40, the second transport layer 50, and the second electrode layer 60 are all located within the sealed cavity 100a.
[0049] The second end of the first lead 70 and the second end of the second lead 80 both extend out of the sealing cavity 100a, and the sealant 91 respectively wraps a portion of the first lead 70 and a portion of the second lead 80.
[0050] Understandably, the sealed cavity 100a can effectively isolate harmful substances such as moisture and oxygen from the outside, preventing damage to the internal structure of the battery. The sealant 91 wraps parts of the first lead 70 and parts of the second lead 80 respectively to ensure the sealing of the sealed cavity 100a, and at the same time, it can fix the position of the first lead 70 and the second lead 80.
[0051] It should be noted that the sealant 91 can be butyl rubber, silicone sealant 91, or other effective sealant 91. The flexible encapsulation layer 90 can be made of PET (polyethylene terephthalate), PVDF (polyvinylidene difluoride), or other effective flexible materials.
[0052] Please see Figure 3 The flexible perovskite solar cell 100 is laminated. Understandably, lamination allows the sealant 91 of the flexible perovskite solar cell 100 to adhere more firmly, and lamination helps to improve the firmness of the first end of the first lead 70 being fixedly connected to the first electrode layer 20 by conductive adhesive, conductive tape, or metal sponge tape, and also helps to improve the firmness of the first end of the second lead 80 being fixedly connected to the second electrode layer 60 by conductive adhesive, conductive tape, or metal sponge tape.
[0053] Please refer to Figure 1 In one embodiment of this invention, the metal wire is copper wire. Using copper wire to braid the first lead 70 and the second lead 80 provides both good electrical conductivity and ease of weaving.
[0054] Please see Figure 5This utility model also proposes an electronic device 1000, including an electronic device 300 and the perovskite solar cell 100 as described above, wherein the electronic device 300 and the perovskite solar cell 100 are electrically connected. The specific structure of the perovskite solar cell 100 is as described in the above embodiments. Since the electronic device 1000 adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. The electronic device 300 can be a wearable device, such as a smartwatch, health monitoring device, etc.; a portable electronic product, such as a smartphone, tablet computer, etc.; or an Internet of Things (IoT) device, such as a sensor, environmental monitoring device, etc.
[0055] Understandably, the perovskite solar cell 100 and the electronic device 300 are electrically connected. The perovskite solar cell 100 can absorb light to generate electricity, thereby providing power to the electronic device 300 and extending the usage time of the electronic device 300.
[0056] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A flexible perovskite solar cell, characterized in that, It includes a flexible substrate layer, a first electrode layer, a first transport layer, a perovskite functional layer, a second transport layer, and a second electrode layer stacked in sequence. Of the first transport layer and the second transport layer, one is a hole transport layer and the other is an electron transport layer; The flexible perovskite solar cell further includes a first lead and a second lead, wherein a first end of the first lead is connected to the first electrode layer and a second end of the first lead extends beyond the flexible substrate layer; a first end of the second lead is connected to the second electrode layer and a second end of the second lead extends beyond the flexible substrate layer. Both the first lead and the second lead are formed by braiding multiple metal wires.
2. The flexible perovskite solar cell as described in claim 1, characterized in that, Both the first lead and the second lead include multiple first wire bundles and multiple second wire bundles, which are interwoven in a mesh-like manner. Both the first wire bundle and the second wire bundle include multiple metal wires.
3. The flexible perovskite solar cell as described in claim 2, characterized in that, The number of metal wires in the first wire bundle is equal to the number of metal wires in the second wire bundle.
4. The flexible perovskite solar cell as described in claim 3, characterized in that, The number of metal wires in the first wire harness and the number of metal wires in the second wire harness are both no less than 4.
5. The flexible perovskite solar cell as described in claim 2, characterized in that, The number of the first wire harness is equal to the number of the second wire harness.
6. The flexible perovskite solar cell as described in claim 5, characterized in that, The number of the first wire harness and the number of the second wire harness are both no less than 6.
7. The flexible perovskite solar cell as described in claim 1, characterized in that, The first end of the first lead is fixedly connected to the first electrode layer by conductive adhesive, conductive tape, or metal sponge tape. The first end of the second lead is fixedly connected to the second electrode layer by conductive adhesive, conductive tape, or metal sponge tape.
8. The flexible perovskite solar cell as described in claim 7, characterized in that, The flexible perovskite solar cell further includes a flexible encapsulation layer and a sealant. The flexible encapsulation layer is disposed over the second electrode, and the sealant is disposed between the flexible encapsulation layer and the flexible substrate layer. The flexible encapsulation layer, the sealant, and the flexible substrate layer enclose a sealed cavity. The first electrode layer, the first transport layer, the perovskite functional layer, the second transport layer, and the second electrode layer are all located within the sealed cavity. The second end of the first lead and the second end of the second lead both extend out of the sealing cavity, and the sealant respectively wraps a portion of the first lead and a portion of the second lead.
9. The flexible perovskite solar cell as described in claim 8, characterized in that, The flexible perovskite solar cell is laminated.
10. An electronic device, characterized in that, It includes an electronic device and a flexible perovskite solar cell as described in any one of claims 1 to 9, wherein the electronic device and the flexible perovskite solar cell are electrically connected.