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CN-122003010-A - Solar cell, photovoltaic module, power generation device and power utilization device

CN122003010ACN 122003010 ACN122003010 ACN 122003010ACN-122003010-A

Abstract

The application provides a solar cell, a photovoltaic module, a power generation device and a power utilization device. The solar cell comprises a first electrode, a hole transmission layer, a perovskite light absorption layer and a second electrode which are arranged in a laminated mode, wherein the hole transmission layer and the perovskite light absorption layer are arranged between the first electrode and the second electrode in a laminated mode, and the hole transmission layer is arranged on one side, far away from the second electrode, of the perovskite light absorption layer. The hole transport layer includes a hole transport material and an organic p-type dopant that contains trifluoromethyl and also contains one or more of boron or cyano. The solar cell of the present application has improved photovoltaic properties.

Inventors

  • CHEN JUNCHAO
  • SUN ANXIN
  • CHEN CHEN
  • LIU SHUO
  • ZHENG JIAWEI

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

Dates

Publication Date
20260508
Application Date
20241108

Claims (11)

  1. 1. A solar cell, characterized in that the solar cell comprises a first electrode, a hole transport layer, a perovskite light absorption layer and a second electrode which are stacked, wherein the hole transport layer and the perovskite light absorption layer are stacked between the first electrode and the second electrode, and the hole transport layer is arranged on one side of the perovskite light absorption layer away from the second electrode; Wherein the hole transport layer comprises a hole transport material and an organic p-type dopant containing trifluoromethyl and further containing one or more of boron or cyano.
  2. 2. The solar cell of claim 1, wherein the organic p-type dopant comprises one or more of the compounds of formula (I) -formula (IV): Wherein R is each independently selected from any one of hydrogen, fluorine or trifluoromethyl, provided that at least 6R are trifluoromethyl in each of the formulae (I) to (II), at least 2R are trifluoromethyl in each of the formulae (III) to (IV), and X + represents a monovalent cation in the formula (II).
  3. 3. The solar cell of claim 1 or 2, wherein the organic p-type dopant comprises one or more of tris [3, 5-bis (trifluoromethyl) phenyl ] borane, tris [3,4, 5-tris (trifluoromethyl) phenyl ] borane, sodium tetrakis [3, 5-bis (trifluoromethyl) phenyl ] borate, potassium tetrakis [3, 5-bis (trifluoromethyl) phenyl ] borate.
  4. 4. A solar cell according to any one of claims 1 to 3, wherein the hole transport material comprises one or more of an organic hole transport material or an inorganic hole transport material.
  5. 5. The solar cell according to claim 4, wherein the organic hole transport material comprises triphenylamine-based compounds and/or the inorganic hole transport material comprises metal oxides.
  6. 6. The solar cell according to claim 5, wherein the triphenylamine compound comprises one or more of poly [ bis (4-phenyl) (2, 4, 6-trimethylphenyl) amine ], poly [ bis (4-phenyl) (2, 4-dimethylphenyl) amine ], poly [ bis (4-phenyl) (4-butylphenyl) amine ], poly [ bis (4-phenyl) (4-fluorophenyl) amine ], poly [ bis (4-phenyl) (2, 4-difluorophenyl) amine ], and/or the metal oxide comprises one or more of nickel oxide, aluminum oxide, tin oxide, antimony doped tin oxide, indium tin oxide.
  7. 7. The solar cell according to any one of claims 1 to 6, wherein the organic P-type dopant comprises 2% -5% by weight of the hole transport material.
  8. 8. The solar cell according to any one of claims 1 to 7, wherein the first electrode is a transparent electrode.
  9. 9. A photovoltaic module, characterized in that it comprises the solar cell of any one of claims 1 to 8.
  10. 10. A power generation device, characterized in that the power generation device comprises the solar cell according to any one of claims 1 to 8.
  11. 11. An electricity consumption device, characterized in that it comprises a solar cell according to any one of claims 1 to 8.

Description

Solar cell, photovoltaic module, power generation device and power utilization device Technical Field The application relates to the technical field of batteries, in particular to a solar battery, a photovoltaic module, a power generation device and a power utilization device. Background In recent years, global energy shortage and environmental pollution problems are increasingly highlighted, and solar cells are receiving more and more attention as ideal renewable energy sources. Solar cells, also known as photovoltaic cells, are devices that convert light energy directly into electrical energy by the photoelectric or photochemical effect. Perovskite solar cells are solar cells that utilize perovskite materials as light absorbing materials. Compared with other solar cells, the perovskite solar cell has the advantages of greatly improved efficiency in a short period, low cost, simple process and the like, and stands out in the field of solar cells. However, the photoelectric performance of perovskite solar cells in the related art still cannot meet the demands of practical application and industrial development. Therefore, how to improve the photoelectric performance of perovskite solar cells remains a technical problem to be solved. Disclosure of Invention The present application has been made in view of the above problems, and an object thereof is to provide a solar cell, a photovoltaic module, a power generation device, and a power utilization device. The solar cell has improved photovoltaic properties. In order to achieve the above object, a first aspect of the present application provides a solar cell comprising a first electrode, a hole transporting layer, a perovskite light absorbing layer and a second electrode which are stacked, the hole transporting layer and the perovskite light absorbing layer being stacked between the first electrode and the second electrode, the hole transporting layer being disposed on a side of the perovskite light absorbing layer remote from the second electrode, wherein the hole transporting layer comprises a hole transporting material and an organic p-type dopant, the organic p-type dopant containing trifluoromethyl and further containing one or more of boron element or cyano group. The high electronegativity trifluoromethyl and one or more of boron or cyano in the p-type dopant can improve the conductivity of the doped hole transport layer, reduce the HOMO energy level and the Fermi energy level, and can be matched with the valence band of the perovskite absorption layer better. Since the p-type dopant described above can effectively adjust the fermi level of the hole transport layer, ohmic contact is advantageously formed, thereby facilitating hole extraction. In addition, trifluoromethyl in the organic p-type dopant increases the fluorine content in the molecule. The increase of the fluorine content is favorable for blocking ion migration and improving the stability of the solar cell. Thus, the solar cell has improved photoelectric properties and stability. In some embodiments, the organic p-type dopant comprises one or more of the compounds of formula (I) -formula (IV): Wherein R is each independently selected from any one of hydrogen, fluorine or trifluoromethyl, provided that at least 6R are trifluoromethyl in each of the formulae (I) to (II), at least 2R are trifluoromethyl in each of the formulae (III) to (IV), and X + represents a monovalent cation in the formula (II). The compound is beneficial to further improving the photoelectric property and stability of the solar cell. In some embodiments, the organic p-type dopant includes one or more of tris [3, 5-bis (trifluoromethyl) phenyl ] borane, tris [3,4, 5-tris (trifluoromethyl) phenyl ] borane, sodium tetrakis [3, 5-bis (trifluoromethyl) phenyl ] borate, potassium tetrakis [3, 5-bis (trifluoromethyl) phenyl ] borate. The compound is beneficial to further improving the photoelectric property and stability of the solar cell. In some embodiments, the hole transport material comprises one or more of an organic hole transport material or an inorganic hole transport material. In some embodiments, the organic hole transport material comprises a triphenylamine-based compound. The triphenylamine compound can effectively transport holes, and can be processed by a solution method, so that a uniform film layer can be formed. Thus, the photoelectric performance of the solar cell is improved. In some embodiments, the inorganic hole transport material comprises a metal oxide. Therefore, the method is beneficial to improving the interface contact of the solar cell, avoiding the generation of interface holes and improving the stability of the solar cell. In some embodiments, the triphenylamine-based compound includes one or more of poly [ bis (4-phenyl) (2, 4, 6-trimethylphenyl) amine ], poly [ bis (4-phenyl) (2, 4-dimethylphenyl) amine ], poly [ bis (4-phenyl) (4-butylphenyl) amine ], poly [ bis (4-phenyl) (4-fluorophenyl) amine