An organic non-fullerene small molecule compound and its preparation method and application

Abstract

The present invention discloses an organic non-fullerene small molecule compound and its preparation method and application. The benzothioether structure is composed of a benzene ring and a five-membered heterocyclic ring, and its molecular skeleton has good planarity and electron conduction ability, and is an excellent electron donor candidate structural unit. The present invention introduces the benzothioether structural unit to synthesize an organic material with an electron acceptor-electron donor structure, and this type of material has good absorption in the visible and infrared spectral regions of the solar spectrum; the organic material molecule of the present invention has a large delocalized π bond, and the photoexcited electrons transition through the π-π antibonding, so it has a higher absorption coefficient, and the molecule has good planarity and a large-area electron donor structure, so a good hole mobility is obtained; compared with the commonly used terminal structure indone, phenylpropyl sulfide has strong thermodynamic stability, low synthesis cost and strong electron donation ability, and has the potential in transparent organic solar cells and near-infrared detectors.

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