Perylene tetracarboxylic carboxylic ester group polymer acceptor materials and application thereof to solar battery

Abstract

The invention discloses perylene tetracarboxylic carboxylic ester group polymer acceptor materials and application thereof to a solar battery. The materials include a structure as refined in formula 1, in the formula 1, M is diazosulfide, dithienyl diazosulfide, selenole, dithienyl selenole, diselenium thiophene selenole, thiophene, dithiophene, terthienyl, benzene, selenophen, diselenide thiophene, terselenide thiophene, thiophene thiophthene, benzo dithiophene, benzo ditellurium thiophene, benzo ditellurium thiophene, or one of derivatives made on the basis of the compounds. R is a linear chain with more than four carbon atoms, a branched chain or an alkyl chain containing different heteroatoms. N is a natural number of 1-1000. By introducing comonomer M on the perylene ring skeletons 1, 7 positions, the level structure of polymer materials can be adjusted, and at the same time, optical property is improved, and use ratio of the materials to light is enhanced. By introducing R, dissolubility of the polymer materials can be adjusted, and utilization of a solution processing technology with low cost is facilitated. The materials can be applied to the field of organic optoelectronics.

Description

technical field [0001] The invention belongs to the field of organic photoelectric technology, and in particular relates to a photoelectric functional polymer semiconductor acceptor material with adjustable energy band structure based on perylene tetracarboxylate derivatives, and also relates to its application in organic solar cells. Background technique [0002] Organic semiconductor materials have aroused extensive interest of researchers because of their excellent photoelectric properties. In the past two decades, organic electronics, which takes organic semiconductor materials and devices as research objects, has developed rapidly. Compared with other types of semiconductor materials, organic semiconductor materials can adjust their energy level structure and the range and intensity of sunlight absorption through chemical structure modification, and their solubility in different solvents can also be adjusted accordingly. Organic semiconductor materials have solution pr...

AI Technical Summary

Problems solved by technology

[0003] At present, the energy conversion efficiency of organic solar cells based on polymer and fullerene systems has reached about 9%, but this type of organic photovoltaic cells still faces many problems.

For example, fullerene derivatives, the change and modification of their chemical structure have limited influence and adjustment ability on their electronic structure. As n-type materials, their lower distribution of LUMO energy levels may lead to heterogeneity in the construction of energy levels with p-type materials. Junction, the excessive loss of absorbed solar energy in the process of photoinduced charge transfer may lead to low cell open circuit voltage

On the other hand, fullerene derivatives have weak absorption in the visible region, which is not conducive to the absorption of solar energy by heterojunctions.

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