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CN-122003012-A - Perovskite solar cell, photovoltaic module, power utilization device and power generation device

CN122003012ACN 122003012 ACN122003012 ACN 122003012ACN-122003012-A

Abstract

The application provides a perovskite solar cell, a photovoltaic module, an electricity utilization device and a power generation device. The perovskite solar cell comprises a first electrode, a perovskite layer, an electron transport layer and a second electrode, wherein the perovskite layer and the electron transport layer are arranged between the first electrode and the second electrode in a stacked mode, and the material of the electron transport layer comprises one or more compounds with structures shown in the following formula (I). The perovskite solar cell has higher photoelectric conversion efficiency.

Inventors

  • ZHONG HONGLIANG
  • LI SIYUAN
  • WU XUEYUN
  • CHEN JUNCHAO
  • JIA BOYU

Assignees

  • 宁德时代未来能源(上海)研究院有限公司
  • 宁德时代新能源科技股份有限公司
  • 上海交通大学

Dates

Publication Date
20260508
Application Date
20241108

Claims (15)

  1. 1. The perovskite solar cell is characterized by comprising a first electrode, a perovskite layer, an electron transport layer and a second electrode, wherein the perovskite layer and the electron transport layer are arranged between the first electrode and the second electrode in a stacked mode, and the material of the electron transport layer comprises one or more of compounds with structures shown in the following formula (I): Wherein, the X comprises C (R 0 ) 2 , each R 0 independently comprises a halogen-substituted C1-C10 alkyl group; Each R 1 independently comprises a C2-C20 alkyl, C2-C20 alkoxy, or C2-C20 alkylthio group; Each R 2 independently comprises a C2-C20 alkyl, C2-C20 alkoxy, or C2-C20 alkylthio group; each Ar independently comprises a substituted or unsubstituted C6-C15 aryl or a substituted or unsubstituted 5-10 membered heteroaryl.
  2. 2. The perovskite solar cell of claim 1, wherein R 0 comprises an F substituted C1-C5 alkyl group.
  3. 3. The perovskite solar cell according to claim 1 or 2, wherein each R 1 independently comprises a C5-C15 alkyl group, and/or, Each R 2 independently includes a C5-C15 alkyl group.
  4. 4. A perovskite solar cell according to any one of claims 1 to 3, wherein each Ar independently comprises a group as shown below: X 1 、X 2 、X 3 and X 4 each independently comprise H, halogen, C1-C20 alkyl, C1-C20 oxo, carbonyl, ester, nitro or cyano, Representing the ligation site.
  5. 5. The perovskite solar cell of any one of claims 1-4, wherein each Ar independently comprises a group as follows: Each of X 1 、X 2 、X 3 and X 4 independently comprises H or halogen, and at least one of X 1 、X 2 、X 3 and X 4 is halogen.
  6. 6. The perovskite solar cell according to any one of claims 1 to 4, wherein the material of the electron transport layer comprises one or more of the following compounds:
  7. 7. The perovskite solar cell according to any one of claims 1 to 6, wherein the thickness of the electron transport layer is 20nm to 30nm.
  8. 8. The perovskite solar cell of any one of claims 1 to 7, wherein the material of the perovskite layer comprises Cs a FA b MA c Pb d Sn e I f Br g , wherein a is 0 to 0.25, b is 0.75 to 1, c is 0 to 0.1, d is 0.5 to 1, e is 0 to 0.5, f is 2 to 3, and g is 0 to 1.
  9. 9. The perovskite solar cell of any one of claims 1-8, wherein the perovskite layer is disposed between the first electrode and the electron transport layer, the first electrode comprising a transparent conductive electrode.
  10. 10. An organic compound having a structure represented by the following formula (I): Wherein, the X comprises C (R 0 ) 2 , each R 0 independently comprises a halogen-substituted C1-C10 alkyl group; Each R 1 independently comprises a C2-C20 alkyl, C2-C20 alkoxy, or C2-C20 alkylthio group; Each R 2 independently comprises a C2-C20 alkyl, C2-C20 alkoxy, or C2-C20 alkylthio group; each Ar independently comprises a substituted or unsubstituted C6-C15 aryl or a substituted or unsubstituted C3-C10 heteroaryl.
  11. 11. An organic compound according to claim 10, wherein each Ar independently comprises a group as shown below: X 1 、X 2 、X 3 and X 4 each independently comprise H, halogen, C1-C20 alkyl, C1-C20 alkoxy, carbonyl, ester, nitro or cyano, Representing the ligation site.
  12. 12. An electron transporting material comprising the organic compound according to claim 10 or 11.
  13. 13. A photovoltaic module comprising the perovskite solar cell according to any one of claims 1 to 9, the organic compound according to any one of claims 10 to 11, or the electron transporting material according to claim 12.
  14. 14. An electrical device comprising the perovskite solar cell of any one of claims 1 to 9, the organic compound of any one of claims 10 to 11, the electron transport material of claim 12, or the photovoltaic module of claim 13.
  15. 15. A power generation device comprising the perovskite solar cell according to any one of claims 1 to 9, the organic compound according to any one of claims 10 to 11, the electron transport material according to claim 12, or the photovoltaic module according to claim 13.

Description

Perovskite solar cell, photovoltaic module, power utilization device and power generation device Technical Field The application relates to the technical field of batteries, in particular to a perovskite solar cell, a photovoltaic module, an electricity utilization device and a power generation device. Background Perovskite solar cells (PSCs, perovskite solar cells) are devices for converting solar energy into electric energy by using a photoelectric conversion mechanism of perovskite crystal materials, are the current third-generation solar cells, and have various advantages of high photoelectric conversion efficiency, simple manufacturing process, low production cost and the like, and have been studied in a large number in recent years. Perovskite solar cells can be classified into a formal (n-i-p) structure and a trans (p-i-n) structure according to the arrangement of the functional layers. The formal structure and the trans-structure have different requirements for charge transport and extraction due to different arrangement of the functional layers, and therefore, the requirements for the materials of the electron transport layers are different. The Y6 material is a non-fullerene acceptor material widely applied to organic solar cells, and there are methods to attempt structural improvement of the Y6 material, and provide a polymer type electron transport material using thiophene-modified Y6 as a structural unit, and apply the material to perovskite solar cells with trans structures, however, the photoelectric conversion efficiency of the perovskite solar cell needs to be further improved. Disclosure of Invention Based on the above, the present application provides a perovskite solar cell having high photoelectric conversion efficiency, and a photovoltaic module, an electric device, and a power generation device including the perovskite solar cell. In a first aspect of the application, a perovskite solar cell is provided, comprising a first electrode, a perovskite layer, an electron transport layer and a second electrode, wherein the perovskite layer and the electron transport layer are arranged between the first electrode and the second electrode in a lamination way, and the material of the electron transport layer comprises one or more of compounds with structures shown as the following formula (I): Wherein, the X comprises C (R 0)2, each R 0 independently comprises a halogen-substituted C1-C10 alkyl group; Each R 1 independently comprises a C2-C20 alkyl, C2-C20 alkoxy, or C2-C20 alkylthio group; Each R 2 independently comprises a C2-C20 alkyl, C2-C20 alkoxy, or C2-C20 alkylthio group; each Ar independently comprises a substituted or unsubstituted C6-C15 aryl or a substituted or unsubstituted 5-10 membered heteroaryl. The application provides a material with a structure shown as a formula (I) as an electron transport layer of a perovskite solar cell, which is improved on the basis of a Y6 structure, in particular to a material with a core groupThe Y6 structure on two sides is connected, so that the photoelectric conversion efficiency of the battery can be effectively improved. In one embodiment, R 0 comprises F-substituted C1-C5 alkyl. The presence of F in the R 0 place substituted by C1-C5 alkyl can further enhance the electron affinity of the material, thereby being beneficial to improving the electron transmission performance and obtaining better photoelectric conversion efficiency. In addition, the number of C atoms of the substituent R 1、R2 in the Y6 structure is reasonably controlled, the molecular structure and the spatial configuration of the material can be properly regulated, and an electron transmission channel between molecules is smoother, so that the electron migration efficiency is improved, and the better photoelectric conversion efficiency is obtained. In one embodiment, each R 1 independently comprises a C5-C15 alkyl group, and/or, Each R 2 independently includes a C5-C15 alkyl group. In one embodiment, each Ar independently comprises a group as set forth below: X 1、X2、X3 and X 4 each independently comprise H, halogen, C1-C20 alkyl, C1-C20 oxo, carbonyl, ester, nitro or cyano, Representing the ligation site. By adopting Ar groups with proper structures, the electron transmission efficiency of the material can be improved and the photoelectric conversion efficiency of the battery can be improved while the plane rigidity of the whole molecular structure is enhanced. In one embodiment, each Ar independently comprises a group as set forth below: Each of X 1、X2、X3 and X 4 independently comprises H or halogen, and at least one of X 1、X2、X3 and X 4 is halogen. The aryl is introduced into Ar and halogen substitution is carried out, so that the electron affinity of the material is enhanced while the stronger molecular rigidity is obtained, the electron transmission performance is improved, and the photoelectric conversion efficiency of the battery is improved. In one embodiment, the material