Perovskite laminated solar module
By designing a perovskite stacked structure and a composite connecting layer, the problem that single-junction perovskite solar cells cannot fully utilize the solar spectrum was solved, achieving higher photoelectric conversion efficiency and lower series resistance. The structure is simple and easy to fabricate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GCL ENERGY ENG CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-04-21
AI Technical Summary
The efficiency of single-junction perovskite solar cells is limited by their band gap, making it impossible to fully utilize the solar spectrum.
The perovskite stacked structure includes a transparent conductive substrate, first and second perovskite sub-cells, a composite interconnect layer and a back electrode. Perovskite sub-cells with different band gaps are connected in series, and the series resistance is reduced by combining metal oxide and conductive polymer layers.
It improves photoelectric conversion efficiency, enables more effective use of the solar spectrum, reduces series resistance between sub-cells, and has a simple structure that is easy to fabricate.
Smart Images
Figure CN224154590U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of solar cell technology, and in particular to a perovskite tandem solar module. Background Technology
[0002] Perovskite tandem solar modules are a new type of solar cell module that uses perovskite material as the photoelectric conversion layer. Perovskite solar cells have advantages such as high photoelectric conversion efficiency, low production cost, and simple manufacturing process.
[0003] Currently, perovskite solar cells have attracted much attention due to their high efficiency and low cost. However, the efficiency of single-junction perovskite solar cells is still limited by their band gap, which makes it impossible to fully utilize the solar spectrum. Tandem solar cells, on the other hand, can utilize the solar spectrum more effectively by connecting cells with different band gaps in series. Therefore, we propose a perovskite tandem solar module. Utility Model Content
[0004] In order to overcome the defects of the prior art mentioned above, the inventors conducted in-depth research and, after a great deal of creative work, completed this utility model.
[0005] Specifically, the technical problem to be solved by this utility model is to provide a perovskite tandem solar module to solve the technical problem that the efficiency of current single-junction perovskite solar cells is still limited by their band gap and cannot fully utilize the solar spectrum.
[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:
[0007] A perovskite tandem solar module includes: a transparent conductive substrate;
[0008] The first perovskite sub-cell is disposed on the transparent conductive substrate and includes a first electron transport layer, a first perovskite light-absorbing layer and a first hole transport layer.
[0009] A composite connection layer is disposed on the first perovskite sub-cell, and the composite connection layer includes a metal oxide layer and a conductive polymer layer;
[0010] The second perovskite sub-cell is disposed on the composite connection layer and includes a second electron transport layer, a second perovskite light-absorbing layer and a second hole transport layer.
[0011] The back electrode is disposed on the second perovskite sub-cell.
[0012] As an improved technical solution, the band gap of the first perovskite sub-cell is larger than that of the second perovskite sub-cell.
[0013] As an improved technical solution, the metal oxide layer in the composite bonding layer is zinc oxide, titanium oxide or tin oxide, and the conductive polymer layer is PEDOT:PSS, PTAA or Spiro-OMeTAD.
[0014] As an improved technical solution, the materials of the first perovskite light-absorbing layer and the second perovskite light-absorbing layer are organic-inorganic hybrid perovskite materials.
[0015] As an improved technical solution, the materials of the first electron transport layer and the second electron transport layer are titanium dioxide, zinc oxide, or fullerene derivatives.
[0016] As an improved technical solution, the materials of the first hole transport layer and the second hole transport layer are Spiro-OMeTAD, PTAA, or NiOx.
[0017] As an improved technical solution, the transparent conductive substrate is made of fluorine-doped tin oxide, indium-doped tin oxide, or aluminum-doped zinc oxide.
[0018] As an improved technical solution, the material of the back electrode is gold, silver or aluminum.
[0019] After adopting the above technical solution, the beneficial effects of this utility model are:
[0020] 1. This utility model uses perovskite material as the light-absorbing layer, which has the advantages of high light absorption coefficient and adjustable band gap, and can effectively improve photoelectric conversion efficiency.
[0021] 2. This utility model adopts a stacked structure, which can make more effective use of the solar spectrum and further improve the photoelectric conversion efficiency.
[0022] 3. This utility model adopts a composite connection layer, which can effectively reduce the series resistance between sub-cells and improve the fill factor of the component.
[0023] 4. This utility model has a simple structure, is easy to prepare, and has good application prospects. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments 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 these drawings without creative effort. Among them:
[0025] Figure 1 This is a schematic diagram of the main structure of this utility model.
[0026] Figure 2 This is a schematic diagram of the exploded structure of this utility model.
[0027] Figure 3 For the present utility model Figure 2 A magnified schematic diagram of the structure at point A.
[0028] Figure 4 For the present utility model Figure 2 A magnified schematic diagram of the structure shown in section B.
[0029] Explanation of reference numerals in the attached figures:
[0030] In the figure: 1. Transparent conductive substrate; 2. First perovskite sub-cell; 201. First electron transport layer; 202. First perovskite light-absorbing layer; 203. First hole transport layer; 3. Composite connection layer; 301. Metal oxide layer; 302. Conductive polymer layer; 4. Second perovskite sub-cell; 401. Second electron transport layer; 402. Second perovskite light-absorbing layer; 403. Second hole transport layer; 5. Back electrode. Detailed Implementation
[0031] 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 protection scope of the present utility model.
[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0033] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.
[0034] Furthermore, in this utility model, descriptions involving "first," "second," etc., 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 that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0035] Reference Figure 1-4 A perovskite tandem solar module is provided, the perovskite tandem solar module comprising a transparent conductive substrate 1;
[0036] The first perovskite sub-cell 2 is disposed on the transparent conductive substrate 1. The first perovskite sub-cell 2 includes a first electron transport layer 201, a first perovskite light-absorbing layer 202 and a first hole transport layer 203, which are arranged sequentially from bottom to top.
[0037] A composite connection layer 3 is disposed on the first perovskite sub-cell 2. The composite connection layer 3 includes a metal oxide layer 301 and a conductive polymer layer 302, which are disposed sequentially from bottom to top.
[0038] The second perovskite sub-cell 4 is disposed on the composite connection layer 3. The second perovskite sub-cell 4 includes a second electron transport layer 401, a second perovskite light-absorbing layer 402 and a second hole transport layer 403, which are arranged sequentially from bottom to top.
[0039] Back electrode 5 is disposed on the second perovskite sub-cell 4, serving as another electrode of the component.
[0040] Reference Figure 1 The band gap of the first perovskite sub-cell 2 is larger than that of the second perovskite sub-cell 4.
[0041] Reference Figure 2 and Figure 4The metal oxide layer 301 in the composite interconnect layer 3 is zinc oxide, titanium oxide or tin oxide, and the conductive polymer layer 302 is PEDOT:PSS (poly(3,4-ethylenedioxythiophene)polystyrene sulfonate), PTAA (poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine]) or Spiro-OMeTAD (spirodifluorene-dimethoxytriphenylamine). In applications, the composite interconnect layer 3 can effectively reduce the series resistance between sub-cells and improve the fill factor of the module.
[0042] Reference Figure 2 , Figure 3 as well as Figure 4 The first perovskite light-absorbing layer 202 and the second perovskite light-absorbing layer 402 are made of organic-inorganic hybrid perovskite material. The chemical formula of the organic-inorganic hybrid perovskite material is ABX3, where A is methylamine, formamidinium or cesium, B is lead or tin, and X is chlorine, bromine or iodine. In applications, perovskite material is used as the light-absorbing layer, which has the advantages of high absorption coefficient and adjustable band gap, and can effectively improve photoelectric conversion efficiency.
[0043] Reference Figure 2 , Figure 3 as well as Figure 4 The materials of the first electron transport layer 201 and the second electron transport layer 401 are titanium dioxide, zinc oxide or fullerene derivatives.
[0044] Reference Figure 2 , Figure 3 as well as Figure 4 The materials of the first hole transport layer 203 and the second hole transport layer 403 are Spiro-OMeTAD, PTAA or NiOx (nickel oxide).
[0045] Reference Figure 1 and Figure 2 The transparent conductive substrate 1 is made of fluorine-doped tin oxide, indium-doped tin oxide, or aluminum-doped zinc oxide.
[0046] Reference Figure 1 and Figure 2 The back electrode 5 is made of gold, silver or aluminum to facilitate its use as an electrode in solar modules.
[0047] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.
Claims
1. A perovskite tandem solar module, characterized by: include: Transparent conductive substrate (1); The first perovskite sub-cell (2) is disposed on the transparent conductive substrate (1). The first perovskite sub-cell (2) includes a first electron transport layer (201), a first perovskite light-absorbing layer (202), and a first hole transport layer (203). A composite connection layer (3) is disposed on the first perovskite sub-cell (2), and the composite connection layer (3) includes a metal oxide layer (301) and a conductive polymer layer (302); The second perovskite sub-cell (4) is disposed on the composite connection layer (3). The second perovskite sub-cell (4) includes a second electron transport layer (401), a second perovskite light-absorbing layer (402), and a second hole transport layer (403). The back electrode (5) is disposed on the second perovskite sub-cell (4).
2. The perovskite tandem solar module of claim 1, wherein: The band gap of the first perovskite sub-cell (2) is greater than that of the second perovskite sub-cell (4).
3. The perovskite tandem solar module of claim 1, wherein: The metal oxide layer (301) in the composite connecting layer (3) is zinc oxide, titanium oxide or tin oxide, and the conductive polymer layer (302) is PEDOT:PSS, PTAA or Spiro-OMeTAD.
4. The perovskite tandem solar module of claim 1, wherein: The materials of the first perovskite light-absorbing layer (202) and the second perovskite light-absorbing layer (402) are organic-inorganic hybrid perovskite materials.
5. The perovskite tandem solar module of claim 1, wherein: The materials of the first electron transport layer (201) and the second electron transport layer (401) are titanium dioxide, zinc oxide or fullerene derivatives.
6. The perovskite tandem solar module of claim 1, wherein: The materials of the first hole transport layer (203) and the second hole transport layer (403) are Spiro-OMeTAD, PTAA or NiOx.
7. The perovskite tandem solar module of claim 1, wherein: The transparent conductive substrate (1) is made of fluorine-doped tin oxide, indium-doped tin oxide, or aluminum-doped zinc oxide.
8. The perovskite tandem solar module of claim 1, wherein: The material of the back electrode (5) is gold, silver or aluminum.