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Quaternary ammonium salt functionalized perylene diimide micromolecule interface layer and preparation method thereof

A perylene diimide and functionalization technology, which is applied in the field of perylene diimide small molecule interface layer and its preparation, can solve the problem that the compatibility between inorganic oxides and organic active layers is not very good, and the energy level can be adjusted In order to avoid problems such as low performance, it can achieve good work function reduction ability, photoelectric conversion efficiency improvement, and the effect of increasing open circuit voltage and short circuit current density.

Pending Publication Date: 2021-11-12
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

However, due to their own structure, the compatibility of inorganic oxides and organic active layers is not very good, and the energy level is less adjustable.

Method used

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  • Quaternary ammonium salt functionalized perylene diimide micromolecule interface layer and preparation method thereof
  • Quaternary ammonium salt functionalized perylene diimide micromolecule interface layer and preparation method thereof
  • Quaternary ammonium salt functionalized perylene diimide micromolecule interface layer and preparation method thereof

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings.

[0044] The reaction equation of the present invention is attached Figure 4 , the specific reaction steps are as follows: a synthesis step of a perylene diimide small molecule interface layer functionalized with a quaternary ammonium salt:

[0045] (1) Synthesis of PDINN:

[0046] Add 2mmol PDI, 4mmol N,N-dimethyldipropylenetriamine, and 40mL methanol into a double-necked flask, vacuumize and fill with nitrogen, and cycle three times; the mixture is refluxed at 70°C for 8h; after the reaction, cool To room temperature, the mixture was poured into 200mL chloroform, extracted with 30ml water, and then distilled under reduced pressure to obtain the crude product; the crude product was purified by suction filtration with acetone, and the product was placed in a vacuum drying oven and dried under vacuum at 50°C for one day to finally obtain a brown-red solid PDINN , the y...

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Abstract

The invention discloses a quaternary ammonium salt functionalized perylene diimide micromolecule interface layer and a preparation method thereof, and the synthesis process is simple and only comprises two steps. Lone pair electrons on secondary amine are subjected to intramolecular charge transfer to perylene diimide cores, so that the perylene diimide has a very strong self-doping effect, a large interface dipole is formed, and the electron mobility is improved; and meanwhile, the quaternary ammonium salt at the tail end also generates dipoles and endows the material with green solvent processing. Due to the formation of the double dipoles, the PDINN-Br has good work function reducing capability, so that good ohmic contact can be formed between an active layer and an electrode, a built-in electric field is enhanced, the open-circuit voltage and short-circuit current density are improved, and finally the device efficiency is improved. In addition, the secondary amine can form hydrogen bonds with F, H and the like in the active layer, so that the interface compatibility is improved, and the interface contact is improved.

Description

technical field [0001] The invention relates to the technical field of organic solar cells, in particular to a perylene diimide small molecule interface layer functionalized with quaternary ammonium salts and a preparation method thereof. Background technique [0002] With the continuous progress of human society and the rapid development of science and technology, the global energy demand is increasing year by year. In order to solve the problems that seriously threaten the future development of human beings such as energy crisis and environmental pollution, develop clean, non-polluting and renewable energy, such as solar energy, Tidal energy, wind energy, etc., have become the focus of the world. Among them, solar energy has attracted the interest of researchers due to its low cost, inexhaustible, inexhaustible, recyclable and other advantages. Solar cells can convert solar energy into electrical energy, and as a technology for utilizing solar energy, they have good prosp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D471/06H01L51/46
CPCC07D471/06H10K85/6572Y02E10/549
Inventor 周丹李玉冰徐镇田徐海涛吕瑞之胡斌谢宇童永芬李明俊
Owner NANCHANG HANGKONG UNIVERSITY
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