Perovskite solar cell
By introducing trisodium methylglycine diacetate as the lead absorption layer in perovskite solar cells, the problem of lead leakage in perovskite solar cells is solved, and the stability and environmental friendliness of the battery are improved.
Patent Information
- Application Number
- CN202411588912.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-03-21
AI Technical Summary
Perovskite solar cells are prone to lead leakage during use, resulting in damage to the ecological environment.
A methylglycine trisodium salt (MGDA-3Na) with metal ion chelation is introduced as the lead absorbing layer in perovskite solar cells to prevent lead leakage.
It effectively prevents lead leakage in the perovskite layer and improves the stability, service life and environmental friendliness of solar cells.
Smart Images
Figure CN119677306A_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present disclosure belong to the technical field of perovskite solar cells, and specifically relate to a perovskite solar cell. Background Art
[0002] Perovskite halide solar cells have developed rapidly in recent decades, and their certified efficiency has exceeded 26%, making them one of the most promising new photovoltaic technologies, and their commercialization process is also accelerating.
[0003] However, commonly used high-efficiency perovskite solar cells use lead-based perovskite films as the absorption layer. During the use of perovskite solar cells, if the component packaging is damaged, it is very easy to cause lead leakage problems, causing damage to the ecological environment. Summary of the invention
[0004] Embodiments of the present disclosure are intended to at least solve the lead leakage problem in a perovskite solar cell, and provide a perovskite solar cell, the perovskite solar cell comprising a substrate, a first transmission layer, a lead absorbing perovskite layer, a second transmission layer, and a top electrode stacked in sequence;
[0005] The substrate is made of a light-transmitting conductive material and is used to introduce light and conduct current;
[0006] The first transport layer and the second transport layer are used to transport carriers;
[0007] The lead absorption perovskite layer comprises a lead absorption layer and a perovskite layer; wherein the lead absorption layer is made of trisodium methylglycine diacetate, and the perovskite layer is used for photoelectric conversion;
[0008] The top electrode is used to conduct current.
[0009] Optionally, the chemical structure of the perovskite in the perovskite layer is ABX 3 ;in,
[0010] A is (CH 3 NH 3 + )MA + ,(HC(NH 2 ) 2 + )FA + and Cs + At least one of the following, B is Pb 2+ , X is I - Br - and Cl - At least one of .
[0011] Optionally, the first transmission layer is made of NiOx, Me-2PACz, MeO-2PACz, Me-4PACz, MeO-4PACz, PTAA, SnO 2 、TiO 2 At least one of the above is made.
[0012] Optionally, the second transmission layer is made of SnO 2 、TiO 2 , C60, and PCBM.
[0013] Optionally, the method for preparing the lead absorption layer includes:
[0014] dissolving methylglycine diacetate trisodium salt in ultrapure water to obtain a first solution;
[0015] applying the first solution to the first transmission layer and heating for a predetermined time;
[0016] The remaining water solvent is removed to obtain a lead absorbing layer.
[0017] Furthermore, the concentration of the first solution is 0.01 mg / ml to 1 mg / ml.
[0018] Optionally, the method for preparing the lead absorption layer includes:
[0019] dissolving methylglycine diacetate trisodium salt in ultrapure water to obtain a second solution;
[0020] The second solution is applied to a glass carrier and heated for a predetermined time to remove the remaining water solvent, thereby obtaining a glass carrier with a lead absorption layer.
[0021] Furthermore, the concentration of the second solution is 1 mg / ml to 50 mg / ml.
[0022] Furthermore, the preparation method of the lead absorbing perovskite layer comprises:
[0023] Covering the glass carrier with the lead absorption layer on the perovskite layer;
[0024] Under a pressure of 200Pa to 30000Pa, the temperature is maintained at 100°C to 150°C for 10min to 60min to form a lead absorbing perovskite layer, and the glass carrier is removed.
[0025] Furthermore, the heating temperature for the predetermined heating time is 100° C. to 180° C., and the predetermined time is 1 min to 10 min.
[0026] A perovskite solar cell of an embodiment of the present disclosure introduces methylglycine diacetate trisodium salt (MGDA-3Na) with metal ion chelation between the perovskite and the transport layer as a lead absorption layer, thereby preventing lead leakage in the perovskite layer. The method is simple, effective, and low-cost, and increases the stability, service life, and environmental friendliness of the perovskite solar cell. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 Schematic diagram of the structure of a perovskite solar cell according to an embodiment of the present disclosure. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.
[0029] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.
[0030] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.
[0031] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another component. Therefore, the first component discussed below can be referred to as the second component without departing from the teachings of the concepts of the present disclosure. As used in this disclosure, the term "and / or" includes any one of the associated listed items and all combinations of one or more.
[0032] Those skilled in the art will appreciate that the drawings are merely schematic diagrams of example embodiments, and the modules or processes in the drawings are not necessarily necessary for implementing the present disclosure, and therefore cannot be used to limit the protection scope of the present disclosure.
[0033] like Figure 1 As shown, an embodiment of the present disclosure provides a perovskite solar cell, which comprises a substrate 1, a first transmission layer 2, a lead absorbing perovskite layer 3, a second transmission layer 4 and a top electrode 5 stacked in sequence. The substrate 1 is made of a light-transmitting conductive material for introducing light and extracting current. The first transmission layer 2 and the second transmission layer 4 are used to transmit carriers. The lead absorbing perovskite layer 3 comprises a lead absorbing layer 31 and a perovskite layer 32; wherein the lead absorbing layer 31 is made of methylglycine diacetic acid trisodium salt, and the perovskite layer 32 is used for photoelectric conversion. The top electrode 5 is used to extract current.
[0034] Specifically, the substrate 1 is made of FTO (fluorine-doped tin oxide) conductive glass or ITO (indium-doped tin oxide) conductive glass, which is the bottom layer of the perovskite solar cell. Its main function is to serve as the incident window of light and the collector of current. Both FTO and ITO have high light transmittance and good conductivity, and can effectively introduce sunlight into the perovskite layer 32 and conduct the generated current. The first transmission layer 2 is made of NiOx, Me-2PACz, MeO-2PACz, Me-4PACz, MeO-4PACz, PTAA, SnO 2 、TiO 2 It is made of at least one of the following, and is located between the substrate 1 and the perovskite light-absorbing layer, and can effectively transfer the carriers generated by light excitation in the perovskite layer 32 to the transparent conductive substrate 1.
[0035] like Figure 1 As shown in (a) and (b), the lead absorption layer 31 in the lead absorption perovskite layer 3 can be arranged between the perovskite layer 32 and the first transmission layer 2, or between the perovskite layer 32 and the second transmission layer 4. Accordingly, there are two methods for preparing the lead absorption layer 31.
[0036] One includes:
[0037] Methylglycine diacetate trisodium salt (MGDA-3Na) is dissolved in ultrapure water to obtain a solution with a concentration of 0.01 mg / ml to 1 mg / ml; the solution is applied to the first transmission layer 2 and heated to 100° C. to 180° C. for 1 min to 10 min; the remaining water solvent is removed under the above environmental conditions to obtain the lead absorption layer 31. Subsequently, the perovskite layer 32 is disposed on the lead absorption layer 31 to form the lead absorption perovskite layer 3.
[0038] The second includes:
[0039] Methylglycine diacetate trisodium salt (MGDA-3Na) is dissolved in ultrapure water to obtain a solution with a concentration of 1 mg / ml to 50 mg / ml; the solution is coated on a blank glass carrier and heated to 100°C to 180°C for 1 to 10 minutes to form a MGDA-3Na thin film, i.e., a lead absorption layer 31. Subsequently, the thin film is covered on the perovskite layer 32 and maintained at a temperature of 100°C to 150°C for 10 to 60 minutes under a pressure of 200 Pa to 30,000 Pa to grow the thin film on the perovskite layer 32 to form a lead absorption perovskite layer 3.
[0040] The perovskite layer 32 is the core part of the perovskite solar cell, and its main function is to absorb sunlight and generate electron-hole pairs. The general chemical structure formula of the perovskite material is ABX 3 , where A is (CH 3 NH 3 + )MA + ,(HC(NH 2 ) 2 + )FA + and Cs + At least one of the organic cations, such as Pb 2+ The metal cation, X is I - Br - and Cl - At least one of the halogen anions.
[0041] The second transport layer 4 is located between the perovskite light absorption layer and the top electrode 5, and its main function is carrier transport. The second transport layer 4 is made of at least one of SnO2, TiO2, C60, and PCBM.
[0042] The top electrode 5 collects current and conducts it for use by an external circuit, and is made of at least one of gold, silver, copper, and ITO.
[0043] A perovskite solar cell of an embodiment of the present disclosure introduces methylglycine diacetate trisodium salt (MGDA-3Na) with metal ion chelation between the perovskite and the transport layer as a lead absorption layer, thereby preventing lead leakage in the perovskite layer. The method is simple, effective, and low-cost, and increases the stability, service life, and environmental friendliness of the perovskite solar cell.
[0044] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.
Claims
1. A perovskite solar cell, characterized in that: The perovskite solar cell comprises a substrate, a first transmission layer, a lead absorbing perovskite layer, a second transmission layer and a top electrode which are stacked in sequence; The substrate is made of a light-transmitting conductive material and is used to introduce light and conduct current; The first transport layer and the second transport layer are used to transport carriers; The lead absorption perovskite layer comprises a lead absorption layer and a perovskite layer; wherein the lead absorption layer is made of trisodium methylglycine diacetate, and the perovskite layer is used for photoelectric conversion; The top electrode is used to conduct current.
2. The perovskite solar cell according to claim 1, characterized in that The chemical structure formula of the perovskite in the perovskite layer is ABX3; wherein, A is (CH3NH3 + )MA + 、(HC(NH2)2 + )FA + and Cs + At least one of the following, B is Pb 2+ , X is I - Br - and Cl - At least one of .
3. The perovskite solar cell according to claim 1, characterized in that The first transmission layer is made of at least one of NiOx, Me-2PACz, MeO-2PACz, Me-4PACz, MeO-4PACz, PTAA, SnO2, and TiO2.
4. The perovskite solar cell according to claim 1, characterized in that: The second transmission layer is made of at least one of SnO2, TiO2, C60, and PCBM.
5. The perovskite solar cell according to claim 1, characterized in that: The preparation method of the lead absorbing layer comprises: dissolving methylglycine diacetate trisodium salt in ultrapure water to obtain a first solution; applying the first solution to the first transmission layer and heating for a predetermined time; The remaining water solvent is removed to obtain a lead absorbing layer.
6. The perovskite solar cell according to claim 5, characterized in that: The concentration of the first solution is 0.01 mg / ml to 1 mg / ml.
7. The perovskite solar cell according to claim 1, characterized in that: The preparation method of the lead absorbing layer comprises: dissolving methylglycine diacetate trisodium salt in ultrapure water to obtain a second solution; The second solution is applied to a glass carrier and heated for a predetermined time to remove the remaining water solvent, thereby obtaining a glass carrier with a lead absorption layer.
8. The perovskite solar cell according to claim 7, characterized in that: The concentration of the second solution is 1 mg / ml to 50 mg / ml.
9. The perovskite solar cell according to claim 7, characterized in that: The preparation method of the lead absorbing perovskite layer comprises: Covering the glass carrier with the lead absorption layer on the perovskite layer; Under a pressure of 200Pa to 30000Pa, the temperature is maintained at 100°C to 150°C for 10min to 60min to form a lead absorbing perovskite layer, and the glass carrier is removed.
10. The perovskite solar cell according to any one of claims 5 to 9, characterized in that: The heating temperature for the predetermined heating time is 100° C. to 180° C., and the predetermined heating time is 1 min to 10 min.