DIFLUORO BENZOTRIAZOLYL ORGANIC SEMICONDUCTOR MATERIAL AND PREPARATION METHOD AND USE THEREOF

摘要

The present invention relates to solar cells and discloses a difluoro benzotriazolyl organic semiconductor material and preparation method and use thereof. The organic semiconductor material is represented by formula (I),
wherein both R 1 and R 2 are C 1 to C 20 alkyl, and n is an integer from 10 to 50. In the difluoro benzotriazolyl organic semiconductor material, since the 1, 2, 3-benzotriazole organic semiconductor material contains two fluorine atoms, the HOMO energy level is reduced by 0.11eV, while the fluorine-substituted 1, 2, 3-benzotriazole has two imido groups with electron-withdrawing ability; the fluorine-substituted 1, 2, 3-benzotriazole is a heterocyclic compound with strong electron-withdrawing ability, and an alkyl chain can be easily introduced to the N-position of the N-H bond of the benzotriazole. The functional group of the alkyl chain can improve the solar energy conversion efficiency, thus solving the low efficiency problem of solar cells made of the organic semiconductor material.