Flexible perovskite solar cell and electronic device
By setting a solvent-resistant buffer layer on the transparent polyimide film, the swelling problem of transparent polyimide in flexible perovskite solar cells was solved, the performance and stability of the cells were improved, and substrate stability was achieved in high-temperature processes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-08
- Publication Date
- 2026-04-07
AI Technical Summary
Transparent polyimide substrates are prone to swelling during the manufacturing process of flexible perovskite solar cells, leading to interface delamination and deterioration of the perovskite film morphology, which affects the performance and stability of the cells.
A solvent-resistant buffer layer is set on a transparent polyimide film and used as the bottom of the P1 scribing channel to block the contact between the transparent polyimide and the perovskite light-absorbing layer. The buffer layer is made of materials such as alumina or silicon nitride to prevent swelling.
It effectively avoids the swelling of transparent polyimide, prevents interface delamination and perovskite film morphology degradation, and improves battery performance and stability. At the same time, it utilizes the excellent high temperature resistance and low thermal expansion coefficient of CPI to avoid substrate deformation.
Smart Images
Figure CN224098081U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of solar cell, especially relates to a flexible perovskite solar cell and electronic equipment. BACKGROUND
[0002] The flexible perovskite solar cell assembly has the advantages of light weight and bendability, and has wide application prospects in wearable devices, outdoor tents and other fields. At present, the commonly used flexible substrate materials are PET, PEN and the like, but they have the problems of poor heat resistance and high thermal expansion coefficient, which can easily lead to substrate deformation and device failure in high-temperature processes. The transparent polyimide (CPI) substrate has excellent high-temperature resistance and low thermal expansion coefficient, which can effectively avoid the above problems.
[0003] However, CPI has poor resistance to polar solvents, and CPI is prone to swelling during perovskite layer coating or annealing, which can cause interface delamination and perovskite film morphology degradation, and seriously affect the performance and stability of the battery. SUMMARY
[0004] The main purpose of the utility model is to provide a flexible perovskite solar cell, which can avoid the problems of interface delamination and perovskite film morphology degradation caused by swelling of transparent polyimide during the process.
[0005] To achieve the above purpose, the flexible perovskite solar cell provided by the utility model comprises:
[0006] a transparent polyimide film;
[0007] a solvent-resistant buffer layer arranged on the transparent polyimide film;
[0008] a bottom electrode arranged on the solvent-resistant buffer layer, wherein the bottom electrode has a plurality of P1 scribe channels;
[0009] a first transport layer arranged on the solvent-resistant buffer layer;
[0010] a perovskite light-absorbing layer arranged on the first transport layer;
[0011] a second transport layer arranged on the perovskite light-absorbing layer, wherein the polarities of the charge carriers transported by the first transport layer and the second transport layer are opposite, and the second transport layer, the perovskite light-absorbing layer and the first transport layer have a plurality of P2 scribe channels penetrating through the second transport layer, the perovskite light-absorbing layer and the first transport layer;
[0012] a top electrode arranged on the second transport layer, wherein the top electrode has a plurality of P3 scribe channels;
[0013] The solvent-resistant buffer layer is the bottom of the P1 scribe channel.
[0014] In one embodiment, the P1 scribe line channel is filled with a perovskite light-absorbing layer material.
[0015] In one embodiment, the thickness of the solvent-resistant buffer layer ranges from 10 nm to 200 nm.
[0016] In one embodiment, the solvent-resistant buffer layer is made of alumina or silicon nitride.
[0017] In one embodiment, the solvent-resistant buffer layer includes an organic layer and an inorganic layer, the organic layer being disposed on the transparent polyimide film, the inorganic layer being disposed on the organic layer, and the bottom electrode being disposed on the inorganic layer.
[0018] In one embodiment, the organic layer is a fluorinated polyimide;
[0019] And / or, the inorganic layer is graphene oxide.
[0020] In one embodiment, the thickness of the transparent polyimide film ranges from 10 μm to 100 μm.
[0021] In one embodiment, the top electrode extends and is connected to the electrode via the P2 scribe line channel.
[0022] In one embodiment, the P2 scribing channel is provided between adjacent P1 scribing channels and P3 scribing channels;
[0023] And / or, the flexible perovskite solar cell further includes a protective film disposed on the top electrode.
[0024] 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.
[0025] In the technical solution of this utility model, by setting a solvent-resistant buffer layer on the transparent polyimide film, and the solvent-resistant buffer layer being the bottom of the P1 scribing channel, the solvent-resistant buffer layer can block the contact between the transparent polyimide film and the perovskite light-absorbing layer. In this way, during the manufacturing process of flexible perovskite solar cells, swelling caused by contact between the transparent polyimide and the perovskite light-absorbing layer can be effectively avoided, thereby solving the problem of interface delamination and perovskite film morphology deterioration caused by swelling of transparent polyimide. Attached Figure Description
[0026] 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.
[0027] Figure 1 A schematic diagram of a structure of an embodiment of the flexible perovskite solar cell provided by this utility model;
[0028] Figure 2 A schematic diagram of the structure of the electronic device provided by this utility model.
[0029] Explanation of icon numbers:
[0030] 100. Flexible perovskite solar cell; 10. Transparent polyimide film; 20. Solvent-resistant buffer layer; 30. Bottom electrode; 40. First transport layer; 50. Perovskite light-absorbing layer; 60. Second transport layer; 70. Top electrode; 80. Protective film; 100a. P1 scribing channel; 100b. P2 scribing channel; 100c. P3 scribing channel; 300. Electronic device; 1000. Electronic device.
[0031] 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
[0032] 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.
[0033] 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.
[0034] 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.
[0035] This invention proposes a flexible perovskite solar cell.
[0036] Please see Figure 1In one embodiment of the flexible perovskite solar cell 100 of this invention, the flexible perovskite solar cell 100 includes a transparent polyimide film 10, a solvent-resistant buffer layer 20, a bottom electrode 30, a first transport layer 40, a perovskite light-absorbing layer 50, a second transport layer 60, and a top electrode 70. The transparent polyimide film 10 is flexible and transparent. The solvent-resistant buffer layer 20 is disposed on the transparent polyimide film 10, and this solvent-resistant buffer layer 20 protects the polyimide film from erosion by solvents used in subsequent deposition processes. The solvent-resistant buffer layer 20 is made of alumina (Al2O3), silicon nitride (SiNx), or other effective solvent-resistant materials. The bottom electrode 30 is disposed on the solvent-resistant buffer layer 20, and the bottom electrode 30 can be made of a transparent conductive material such as indium tin oxide (ITO), fluorine-doped tin oxide (FTO), or other effective transparent conductive materials. The bottom electrode 30 has a plurality of P1 scribe lines 100a. The first transport layer 40 is disposed on the solvent-resistant buffer layer 20. A perovskite light-absorbing layer 50 is disposed on the first transport layer 40. The perovskite light-absorbing layer 50 is used to absorb light and generate charge carriers. A second transport layer 60 is disposed on the perovskite light-absorbing layer 50. The charge carriers transported by the first transport layer 40 and the second transport layer 60 have opposite polarities. The second transport layer 60, the perovskite light-absorbing layer 50, and the first transport layer 40 each have a plurality of P2 scribe lines 100b penetrating the second transport layer 60, the perovskite light-absorbing layer 50, and the first transport layer 40. The plurality of P2 scribe lines 100b penetrate the second transport layer 60, the perovskite light-absorbing layer 50, and the first transport layer 40, exposing the bottom electrode 30. These P2 scribe lines 100b are used to connect the top electrode 70 to the bottom electrode 30 of adjacent cells. The top electrode 70 is disposed on the second transport layer 60 and can be made of gold (Au), silver (Ag), a transparent conductive oxide, or other effective conductive materials. The top electrode 70 has multiple P3 scribing channels 100c for dividing multiple sub-cells. The solvent-resistant buffer layer 20 is located at the bottom of the P1 scribing channels 100a.
[0037] It should be noted that, in one embodiment, the first transport layer 40 can be an electron transport layer (ETL), and the second transport layer 60 can be a hole transport layer (HTL). In another embodiment, the first transport layer 40 can be a hole transport layer (HTL), and the second transport layer 60 can be an electron transport layer (ETL). Specifically, the electron transport layer material can be titanium dioxide (TiO2), zinc oxide (ZnO), organic materials such as C60, or other materials effectively capable of transporting electrons. The hole transport layer material can be Spiro-OMeTAD, or other materials effectively capable of transporting holes, etc. The solvent-resistant buffer layer 20 is used to prevent the perovskite light-absorbing layer 50 from contacting the transparent polyimide film 10.
[0038] Understandably, by providing a solvent-resistant buffer layer 20 on the transparent polyimide film 10, and with the solvent-resistant buffer layer 20 located at the bottom of the P1 scribing channel 100a, the solvent-resistant buffer layer 20 can prevent contact between the transparent polyimide film 10 and the perovskite light-absorbing layer 50. This effectively prevents swelling caused by contact between the transparent polyimide and the perovskite light-absorbing layer 50 during the manufacturing process of the flexible perovskite solar cell 100, thus solving the problem of interface delamination and perovskite film morphology degradation due to swelling of the transparent polyimide. Furthermore, using CPI as the flexible substrate, compared to materials such as PET / PEN, offers superior high-temperature resistance and a low coefficient of thermal expansion, avoiding substrate deformation and device failure during high-temperature processes.
[0039] It should be noted that the manufacturing and materials of the first transport layer 40, the second transport layer 60, the perovskite light-absorbing layer 50, the bottom electrode 30, and the top electrode 70 are all existing technologies and will not be described in detail here.
[0040] Furthermore, by introducing an ultrathin solvent-resistant buffer layer 20 on the surface of the CPI substrate, direct contact between the perovskite solution and the CPI can be effectively blocked, preventing the CPI substrate from swelling during perovskite solution processing. This prevents problems such as interface delamination and perovskite film morphology degradation, which is beneficial to improving the performance and stability of the flexible perovskite solar cell 100.
[0041] Please see Figure 1 In one embodiment of the flexible perovskite solar cell 100 of this utility model, the P1 scribe line channel 100a is filled with perovskite light-absorbing layer 50 material.
[0042] Please see Figure 1 In one embodiment of the flexible perovskite solar cell 100 of this utility model, the thickness of the solvent-resistant buffer layer 20 ranges from 10nm to 200nm, for example: 10nm, 30nm, 60nm, 90nm, 100nm, 200nm, etc.
[0043] Please see Figure 1 In one embodiment of the flexible perovskite solar cell 100 of this invention, the solvent-resistant buffer layer 20 is made of alumina or silicon nitride. This arrangement makes alumina or silicon nitride readily available, facilitating the processing and manufacturing of the flexible perovskite solar cell 100.
[0044] Please see Figure 1 In one embodiment of the flexible perovskite solar cell 100 of this utility model, the solvent-resistant buffer layer 20 includes an organic layer and an inorganic layer. The organic layer is disposed on the transparent polyimide film 10, the inorganic layer is disposed on the organic layer, and the bottom electrode 30 is disposed on the inorganic layer.
[0045] Please see Figure 1In one embodiment of the flexible perovskite solar cell 100 of this invention, the organic layer is fluorinated polyimide. The use of the fluorinated polyimide organic layer enhances the solvent resistance of the solvent-resistant buffer layer 20.
[0046] Please see Figure 1 In one embodiment of the flexible perovskite solar cell 100 of this invention, the inorganic layer is graphene oxide. The inorganic layer of graphene oxide provides additional protection and improves interface properties.
[0047] Please see Figure 1 In one embodiment of the flexible perovskite solar cell 100 of this invention, the thickness of the transparent polyimide film 10 ranges from 10 μm to 100 μm, for example: 10 μm, 30 μm, 60 μm, 90 μm, 100 μm, etc. A polyimide film thickness of 10 μm to 100 μm ensures both a certain degree of flexibility and a certain degree of mechanical strength.
[0048] Please see Figure 1 In one embodiment of the flexible perovskite solar cell 100 of this utility model, the top electrode 70 is extended and connected to the electrode through the P2 scribing channel 100b.
[0049] Please see Figure 1 In one embodiment of the flexible perovskite solar cell 100 of this invention, a P2 scribe channel 100b is provided between adjacent P1 scribe channels 100a and P3 scribe channels 100c. Specifically, the P1 scribe channel 100a isolates the bottom electrode 30 of adjacent sub-cell units, the P2 scribe channel 100b connects the top electrode 70 of one sub-cell unit to the bottom electrode 30 of the next sub-cell unit, and the P3 scribe channel 100c isolates the top electrode 70 of adjacent sub-cell units. In this way, multiple sub-cell units can be connected in series.
[0050] Please see Figure 1 In one embodiment of the flexible perovskite solar cell 100 of this utility model, the flexible perovskite solar cell 100 further includes a protective film 80, which is disposed on the top electrode 70 to protect the solar cell from environmental factors (such as moisture and oxygen) and prevent these factors from causing material degradation of the perovskite light-absorbing layer 50.
[0051] It should be noted that the transparent polyimide film 10, graphene oxide, fluorinated polyimide, aluminum oxide, and silicon nitride are all materials of existing technology.
[0052] Please see Figure 2This utility model also proposes an electronic device 1000, including an electronic device 300 and the flexible perovskite solar cell 100 as described above, wherein the electronic device 300 and the flexible perovskite solar cell 100 are electrically connected. The specific structure of the flexible 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 further 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.
[0053] Understandably, the flexible perovskite solar cell 100 and the electronic device 300 are electrically connected. The flexible 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.
[0054] 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, include: Transparent polyimide film; A solvent-resistant buffer layer is disposed on the transparent polyimide film; A bottom electrode is disposed on the solvent-resistant buffer layer, and the bottom electrode has multiple P1 scribing channels; The first transport layer is disposed on the solvent-resistant buffer layer; A perovskite light-absorbing layer is disposed on the first transmission layer; The second transport layer is disposed on the perovskite light-absorbing layer. The polarities of the charge carriers transported by the first transport layer and the second transport layer are opposite. The second transport layer, the perovskite light-absorbing layer, and the first transport layer have multiple P2 scribed channels that penetrate the second transport layer, the perovskite light-absorbing layer, and the first transport layer. A top electrode is disposed on the second transport layer, and the top electrode has multiple P3 scribing channels; The solvent-resistant buffer layer is located at the bottom of the P1 scribe channel and is used to prevent the perovskite light-absorbing layer from contacting the transparent polyimide film.
2. The flexible perovskite solar cell as described in claim 1, characterized in that, The P1 scribe line channel is filled with perovskite light-absorbing layer material.
3. The flexible perovskite solar cell as described in claim 1, characterized in that, The thickness of the solvent-resistant buffer layer ranges from 10 nm to 200 nm.
4. The flexible perovskite solar cell as described in claim 1, characterized in that, The solvent-resistant buffer layer is made of alumina or silicon nitride.
5. The flexible perovskite solar cell as described in claim 1, characterized in that, The solvent-resistant buffer layer includes an organic layer and an inorganic layer. The organic layer is disposed on the transparent polyimide film, the inorganic layer is disposed on the organic layer, and the bottom electrode is disposed on the inorganic layer.
6. The flexible perovskite solar cell as described in claim 5, characterized in that, The organic layer is a fluorinated polyimide; And / or, the inorganic layer is graphene oxide.
7. The flexible perovskite solar cell as described in claim 1, characterized in that, The thickness of the transparent polyimide film ranges from 10 μm to 100 μm.
8. The flexible perovskite solar cell as described in claim 1, characterized in that, The top electrode extends and connects to the electrode through the P2 scribed channel.
9. The flexible perovskite solar cell as described in claim 1, characterized in that, The P2 scribing channel is provided between the adjacent P1 scribing channel and the P3 scribing channel; And / or, the flexible perovskite solar cell further includes a protective film disposed on the top electrode.
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.