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Perylene diimide assembly doped perovskite solar cell and preparation method thereof

A perylene diimide and solar cell technology, which is applied in the field of solar cell materials, can solve problems such as limiting structural adjustability, and achieve the effects of inhibiting interfacial recombination, improving optical properties and thermal stability, and effective charge transport

Pending Publication Date: 2022-07-29
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, limited by their inherent insolubility in organic solvents, perylene diimides can only be performed in a few special solvents, such as concentrated sulfuric acid or m-cresol, which greatly limits their structural tunability.

Method used

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  • Perylene diimide assembly doped perovskite solar cell and preparation method thereof
  • Perylene diimide assembly doped perovskite solar cell and preparation method thereof
  • Perylene diimide assembly doped perovskite solar cell and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 1. Preparation of perylene diimide

[0031] Weigh 1.376g of perylene-3,4,9,10-tetracarboxylic dianhydride, 2.5g of 3-aminopropionic acid and 18g of imidazole, put the three into a round-bottomed flask, and place them in a nitrogen atmosphere at 100°C. Stir and heat for 4h. After the reaction was completed, it was cooled to room temperature and dispersed in 100 ml of ethanol. 300ml of dilute hydrochloric acid was added to it, and the mixture was stirred for 24h. The final product was vacuum filtered through a 0.45 μm membrane and the red solid was collected. Wash with distilled water several times until the pH of the washing solution becomes neutral. The obtained solid was dried under vacuum at 60°C, namely pure perylene diimide powder.

[0032] 2. Preparation of perylene diimide-LDH (ion exchange method)

[0033] Preparation of LDH precursor:

[0034] Weigh magnesium nitrate hexahydrate (3.8461g) and aluminum nitrate nonahydrate (1.8760g) with a molar ratio of 2:1...

Embodiment 2

[0048] 1. Preparation of perylene diimide

[0049] Weigh 1.376g of perylene-3,4,9,10-tetracarboxylic dianhydride, 2.5g of 3-aminopropionic acid and 18g of imidazole, put the three into a round-bottomed flask, and place them in a nitrogen atmosphere at 100°C. Stir and heat for 4h. After the reaction was completed, it was cooled to room temperature and dispersed in 100 ml of ethanol. 300ml of dilute hydrochloric acid was added to it, and the mixture was stirred for 24h. The final product was vacuum filtered through a 0.45 μm membrane and the red solid was collected. Wash with distilled water several times until the pH of the washing solution becomes neutral. The obtained solid was dried under vacuum at 60°C, namely pure perylene diimide powder.

[0050] 2. Preparation of perylene diimide-LDH (co-precipitation intercalation)

[0051] Weigh magnesium nitrate hexahydrate (3.8461g) and aluminum nitrate nonahydrate (1.8760g) with a molar ratio of 2:1 and dissolve them in 200ml t...

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Abstract

The invention discloses a perovskite solar cell doped with a perylene diimide assembly and a preparation method of the perovskite solar cell. The perovskite solar cell doped with the perylene diimide assembly is composed of a conductive substrate, an electron transport layer, a perovskite light absorption layer doped with the perylene diimide assembly and a counter electrode layer which are stacked in sequence. The Pi-Pi stacking interaction formed by the perylene diimide assembly improves the separation and transfer of carriers, passivates the perovskite defects, and improves the optical performance and thermal stability of the perovskite solar cell. And meanwhile, the expanded pi conjugation of the perylene diimide assembly ensures high electronic conductivity to realize effective charge transfer, and oxygen atoms on carbonyl can be chelated with uncoordinated Pb < 2 + > to passivate surface defects of perovskite crystals, so that interface recombination is inhibited, and the efficiency is improved. According to the invention, the cell efficiency of the perovskite solar cell manufactured by using the perylene diimide assembly is up to 13.87%.

Description

technical field [0001] The invention belongs to the technical field of solar cell materials, in particular to a perovskite solar cell doped with a perylene diimide assembly and a preparation method thereof. Background technique [0002] Organic-inorganic hybrid halide perovskites have attracted much attention due to their excellent properties such as high absorption coefficient, wide absorption range, tunable direct band gap, and long charge carrier diffusion length. As solution-processable perovskite solar cells (PSCs) combine the advantages of high efficiency and easy fabrication, they have shown great promise as a competitive low-cost solar cell to compete with conventional inorganic cells. Lead-based perovskite solar cells (PSCs) have experienced astonishing growth with certified power conversion efficiencies (PCEs) exceeding 25.5%, a major advance that makes PSCs comparable in optoelectronic performance to crystalline silicon and cadmium telluride solar cells. These ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/46H01L51/42H01L51/48
CPCH10K71/12H10K85/30H10K30/30
Inventor 史文颖孔健姚健梁开香
Owner BEIJING UNIV OF CHEM TECH
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