Organic n-type semiconductor polymer material based on naphthalimide-selenophen derivative as well as preparation method and application of organic n-type semiconductor polymer material

Abstract

The invention discloses an organic n-type semiconductor polymer material based on naphthalimide-selenophen derivative as well as a preparation method and application of the organic n-type semiconductor polymer material. The organic n-type semiconductor polymer material is based on long-chain naphthalimide or a derivative thereof as an electron withdrawing unit and alkoxy substituted selenophen ora selenophen derivative as an electron donating unit, wherein 3-position or 4-position of selenophen or the selenophen derivative is substituted with alkoxy or 3-position and 4-position of selenophenor the selenophen derivative is substituted with alkoxy. The n-type conjugated polymer semiconductor based on naphthalimide and selenophen derivatives disclosed by the invention has the advantages ofsolution processing, high electron mobility, proper energy level, excellent film-forming properties and the like, and is an ideal non-fullerene acceptor material.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to an organic n-type semiconductor polymer material based on a naphthalimide-alkoxy substituted selenophene electron-donating group with an electron-withdrawing structure, and a preparation method and application thereof. Background technique [0002] Solar energy is an inexhaustible clean and green energy. In recent years, with the attention of countries all over the world on energy issues, solar cells have become a research hotspot in this field. Compared with traditional semiconductor solar cells, organic solar cells have significant advantages such as low cost, light weight, simple manufacturing process, easy realization of flexibility, and adjustable absorption band of sunlight, so they have become the most promising new photovoltaic devices in recent years. One of the research and development directions, see references [1]-[4]. [0003] So far, most of the resea...

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Problems solved by technology

[0003] So far, most of the research on organic solar cell materials has focused on the donor materials suitable for bulk heterojunction devices, and the acceptor materials paired with the donor materials are basically limited to fullerenes and their derivatives. However, these materials have some obvious disadvantages: high cost of raw materials, low light absorption efficiency, small space for energy level adjustment, photochemical instability, easy crystallization at high temperature, and low energy level of the lowest unoccupied molecular orbital (LUMO) leading to battery open circuit. low voltage

These disadvantages seriously hinder the further development of organic solar cells

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