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CN-121985667-A - Solar cell activation layer added with nitrophenol, preparation method and application thereof, and solar cell

CN121985667ACN 121985667 ACN121985667 ACN 121985667ACN-121985667-A

Abstract

The invention relates to the technical field of solar cell activation layers, in particular to a solar cell activation layer added with nitrophenol, a preparation method and application thereof, and a solar cell. The invention provides a solar cell activation layer added with nitrophenol, which comprises an electron donor, an electron acceptor and nitrophenol, wherein the electron donor is a polymer electron donor, and the electron acceptor is a non-fullerene electron acceptor. The nitrophenol is used as a solid additive for the solar cell activation layer added with the nitrophenol, so that the problem of high toxicity can be solved, and the photoelectric conversion efficiency of the solar cell can be improved.

Inventors

  • ZHANG YOUDAN
  • LIU RONGRONG
  • CHEN XUE
  • GAO XINRU

Assignees

  • 兰州交通大学

Dates

Publication Date
20260505
Application Date
20260210

Claims (10)

  1. 1. A solar cell activation layer added with nitrophenol, which is characterized by comprising an electron donor, an electron acceptor and nitrophenol; The electron donor is a polymer electron donor; The electron acceptor is a non-fullerene electron acceptor.
  2. 2. The nitrophenol-added solar cell activation layer according to claim 1, wherein the mass ratio of the electron donor to the electron acceptor is 1 (1.1-1.4).
  3. 3. The nitrophenol added solar cell activation layer of claim 1 or 2, wherein the electron donor comprises one or more of D18, PM6, PM7, D18-Cl, and PTQ 10.
  4. 4. The nitrophenol added solar cell activation layer of claim 1 or 2, wherein the electron acceptor comprises one or more of L8-BO, Y6-BO-4F, BTP-eC9 and N3-4 Cl.
  5. 5. The nitrophenol-added solar cell activation layer of claim 1, wherein the nitrophenol comprises 5% -30% of the electron donor by mass.
  6. 6. The nitrophenol added solar cell activation layer of claim 1 or 5, wherein the nitrophenol comprises one or more of o-nitrophenol, p-nitrophenol, and m-nitrophenol.
  7. 7. The method for preparing the nitrophenol-added solar cell activation layer according to any one of claims 1 to 6, which is characterized by comprising the following steps: mixing an electron donor, an electron acceptor, nitrophenol and an organic solvent to obtain an activation layer solution; and in a protective atmosphere, coating the activating layer solution on the surface of a substrate, and then annealing to obtain the nitrophenol-added solar cell activating layer.
  8. 8. The method of claim 7, wherein the concentration of electron donor in the active layer solution is 3.5-8 mg/mL; The annealing temperature is 90-100 ℃ and the annealing time is 5-10 min.
  9. 9. The application of the nitrophenol-added solar cell activation layer prepared by any one of claims 1-6 or the nitrophenol-added solar cell activation layer prepared by the preparation method of claim 7 or 8 in a solar cell.
  10. 10. A solar cell comprising an active layer; the active layer is the active layer of the solar cell added with nitrophenol according to any one of claims 1-6 or the active layer of the solar cell added with nitrophenol prepared by the preparation method according to claim 7 or 8.

Description

Solar cell activation layer added with nitrophenol, preparation method and application thereof, and solar cell Technical Field The invention relates to the technical field of solar cell activation layers, in particular to a solar cell activation layer added with nitrophenol, a preparation method and application thereof, and a solar cell. Background The solar cell is one of sustainable green energy technologies with great prospect, and is inexhaustible. Organic solar cells (organic solar cells, OSCs) are of great interest due to their low solution processing cost, flexibility, light weight and transparency. In recent years, with rapid development of donor/acceptor materials and optimization of device processes, the Photoelectric Conversion Efficiency (PCE) of single-segment OSCs has reached 21%. As the core of OSCs, the morphology and carrier transport properties of the active layer, which is responsible for the processes of light absorption, exciton dissociation, charge transport, etc., directly determine the device efficiency and stability. The existing high-efficiency OSCs need to optimize the appearance of an activation layer through a complex post-treatment process, but the process has the problems of poor repeatability, poor stability and the like, and severely limits large-scale production. The solid additive is one of the simple and effective methods for optimizing the performance of the device, and is one of the most effective strategies for promoting the rapid development of OSCs because of the advantages of simple preparation process, capability of improving the morphology of the active layer and the stability of the device by controlling the film forming dynamics and adjusting the interaction between the solid additive and each material in the active layer. However, the existing solid additive contains more halogen and has high toxicity, and does not accord with the development trend of industry. Therefore, a solid additive which is easy to prepare and can effectively improve the performance of an active layer is a research hot spot. The nitrophenol is a non-halogen organic compound, has simple structure, environment friendliness and low toxicity, can form various interactions with an activation layer donor and an acceptor material, and can effectively improve the appearance of the activation layer and improve the performance of a device. At present, no related art report has been made on the application of nitrophenols as solid additives to OSCs active layers. Disclosure of Invention In view of the above, the invention aims to provide a solar cell activation layer added with nitrophenol, a preparation method and application thereof, and a solar cell. The nitrophenol is used as a solid additive for the solar cell activation layer added with the nitrophenol, so that the problem of high toxicity can be solved, and the photoelectric conversion efficiency of the solar cell can be improved. In order to achieve the above object, the present invention provides the following technical solutions: the invention provides a solar cell activation layer added with nitrophenol, which comprises an electron donor, an electron acceptor and nitrophenol; The electron donor is a polymer electron donor; The electron acceptor is a non-fullerene electron acceptor. Preferably, the mass ratio of the electron donor to the electron acceptor is 1 (1.1-1.4). Preferably, the electron donor comprises one or more of D18, PM6, PM7, D18-Cl and PTQ 10. Preferably, the electron acceptor comprises one or more of L8-BO, Y6-BO-4F, BTP-eC9 and N3-4 Cl. Preferably, the nitrophenol accounts for 5-30% of the electron donor by mass. Preferably, the nitrophenol comprises one or more of o-nitrophenol, p-nitrophenol and m-nitrophenol. The invention also provides a preparation method of the nitrophenol-added solar cell activation layer, which comprises the following steps: mixing an electron donor, an electron acceptor, nitrophenol and an organic solvent to obtain an activation layer solution; and in a protective atmosphere, coating the activating layer solution on the surface of a substrate, and then annealing to obtain the nitrophenol-added solar cell activating layer. Preferably, the concentration of the electron donor in the activation layer solution is 3.5-8 mg/mL; the annealing temperature is 90-100 ℃ and the annealing time is 5-10 min. The invention also provides the application of the nitrophenol-added solar cell activation layer in the solar cell, wherein the nitrophenol-added solar cell activation layer is prepared by the preparation method in the technical scheme. The invention also provides a solar cell, comprising an activation layer; The active layer is the active layer of the solar cell added with the nitrophenol prepared by the technical scheme or the active layer of the solar cell added with the nitrophenol prepared by the preparation method. The invention provides a solar cell activation layer added with nitrophenol, which com