CN-121174771-B - 5-Amino isophthalic acid synergistically regulated lead-based perovskite solar cell and preparation method thereof

Abstract

The invention discloses a lead-based perovskite solar cell cooperatively regulated and controlled by 5-amino isophthalic acid and a preparation method thereof, and belongs to the technical field of photovoltaic solar cells. According to the invention, 5-amino isophthalic acid is added into the anti-solvent, so that the quality of the perovskite film is optimized, and the filling factor and the photoelectric conversion efficiency of the lead-based perovskite solar cell device are improved. Further, 5-amino isophthalic acid is cooperatively introduced into the perovskite precursor solution and the antisolvent, and the comprehensive regulation and control of the perovskite film-forming crystallization process is realized through multiple action mechanisms of perovskite crystal nucleation, growth regulation and defect passivation. The collaborative doping strategy not only improves the grain size and the film crystallization quality, reduces the trap state density and the non-radiation recombination probability, but also obviously improves the open-circuit voltage, the filling factor and the operation stability of the device, and is suitable for large-scale preparation of high-performance perovskite photovoltaic devices.

Inventors

• WANG JING
• LIU XIANGHUA
• HU ZEYUAN
• Huang Jinuo
• XUE QIFAN
• MIN YONGGANG

Assignees

• 广东工业大学

Dates

Publication Date

20260505

Application Date

20250801

Claims (8)

1. The application of the 5-amino isophthalic acid in the antisolvent additive of the perovskite layer of the lead-based perovskite solar cell is that the concentration of the 5-amino isophthalic acid in the antisolvent is 0.5-1 mg/mL.
2. The application of the 5-amino isophthalic acid in preparing the perovskite layer of the lead-based perovskite solar cell is characterized in that the 5-amino isophthalic acid is added into a perovskite precursor solution and an antisolvent, wherein the concentration of the 5-amino isophthalic acid in the antisolvent is 0.5-1 mg/mL, and the concentration of the 5-amino isophthalic acid in the perovskite precursor solution is 0.9-1.8 mg/mL.
3. 3. A method for improving the photoelectric performance of a lead-based perovskite solar cell is characterized in that 5-amino isophthalic acid is added into an anti-solvent of a perovskite layer or 5-amino isophthalic acid is added into a perovskite solution and the anti-solvent of the perovskite layer at the same time.
4. 4. A preparation method of a lead-based perovskite solar cell sequentially prepares a hole transport layer, a perovskite layer, an electron transport layer and an electrode layer on a conductive glass layer by adopting a spin coating method, and is characterized in that the preparation method of the perovskite layer comprises the following steps of sequentially spin-coating a perovskite precursor solution and an antisolvent containing 5-amino isophthalic acid on the hole transport layer or sequentially spin-coating a perovskite precursor solution containing 5-amino isophthalic acid and an antisolvent containing 5-amino isophthalic acid on the hole transport layer, and annealing to obtain the perovskite layer.
5. 5. The method according to claim 4, wherein the antisolvent comprises at least one of chlorobenzene, toluene, dichloromethane, chloroform, dichlorobenzene, and chloroform.
6. 6. The method according to claim 4, wherein the anti-solvent is added in an amount of 200 to 300. Mu.L.
7. 7. The lead-based perovskite solar cell prepared by the preparation method of any one of claims 4-6.
8. 8. Use of the lead-based perovskite solar cell according to claim 7 for the production of photovoltaic power generation equipment.

Description

5-Amino isophthalic acid synergistically regulated lead-based perovskite solar cell and preparation method thereof Technical Field The invention belongs to the technical field of photovoltaic solar cells, and particularly relates to a lead-based perovskite solar cell cooperatively regulated and controlled by 5-amino isophthalic acid and a preparation method thereof. Background In recent years, perovskite solar cells have attracted considerable attention in the field of photovoltaic energy conversion due to their excellent light absorption characteristics, excellent carrier transport properties, and tunable energy band structures. Since the first report, the photoelectric conversion efficiency has been rapidly increased from less than 4% to more than 27% at first, and the theoretical efficiency limit of the conventional crystalline silicon cell has been approached under laboratory conditions. Compared with silicon-based photovoltaic devices, the perovskite material has the advantages of low-temperature solution processing technology, abundant raw materials, simple and convenient preparation technology and the like, has stronger industrialization potential and cost advantage, and is considered as an important candidate of the next-generation high-efficiency photovoltaic technology. From the device structure point of view, perovskite solar cells are largely classified into conventional structures (n-i-p type) and inverted structures (p-i-n type). Among them, the inverted structure gradually becomes one of the hot spot directions of research due to its low hysteresis, high stability and good compatibility to the low temperature preparation process. However, as device performance approaches bottlenecks, further increasing its efficiency becomes increasingly difficult, mainly limited by the high density defects present in perovskite thin films at grain boundaries and interfaces. These defects tend to induce carrier non-radiative recombination, limiting the efficient extraction and transport of photogenerated charge, one of the major factors affecting device performance. In recent years, researchers have generally adopted strategies to introduce functional additives into precursor solutions to regulate nucleation kinetics, promote grain growth, and passivate defects. Common additives include carboxylic acids, amines, small molecule ligands, metal salts, and the like, which can interact with non-coordinated Pb 2+ or organic cations/halogen ions, thereby improving the crystallization quality and device performance of the thin film to different degrees. However, most of the current additives usually only act at a certain stage of the film forming process, so that continuous regulation and control of the perovskite nucleation-growth whole process are difficult to realize, the structure is single, the acting sites are limited, and the passivation of grain boundary defects and the stability of crystal structures cannot be simultaneously considered, so that the adding effect is limited. Disclosure of Invention In order to solve the problems of the prior art, the primary object of the present invention is to provide the use of 5-amino isophthalic acid in an anti-solvent additive for perovskite layers of lead-based perovskite solar cells. It is a further object of the present invention to provide the use of 5-aminoisophthalic acid in the preparation of perovskite layers of lead-based perovskite solar cells, said 5-aminoisophthalic acid being added to a perovskite precursor solution and an antisolvent. It is yet another object of the present invention to provide a method of improving the photovoltaic performance of lead-based perovskite solar cells. It is yet another object of the present invention to provide a method of manufacturing a lead-based perovskite solar cell. It is yet another object of the present invention to provide a lead-based perovskite solar cell. It is a further object of the present invention to provide the use of the lead-based perovskite solar cell as described above in the preparation of photovoltaic power generation devices. In order to achieve the above object, the present invention provides the following technical solutions: use of 5-aminoisophthalic acid in an antisolvent additive for a perovskite layer of a lead-based perovskite solar cell. According to the invention, 5-amino isophthalic acid is added into the anti-solvent, so that the quality of the perovskite film is optimized, and the filling factor and the photoelectric conversion efficiency of the lead-based perovskite solar cell device are improved. The carboxyl (-COOH) contained in the 5-amino isophthalic acid molecule can form stable coordination action with non-coordinated Pb 2+ ions in perovskite crystals, so that the crystal boundary or surface defects can be effectively passivated, and the amino group (-NH 2) can interact with I - ions through hydrogen bonding, so that the stability of crystal interfaces is further enhanced. The metho