| abstract |
The invention provides a small molecule material or polymer based on thiophenebenzenethiophene dispirofluorene group, which has the characteristics of good electron-donating ability, good planarity and easy modification of side chains, and is different from other groups with electron-withdrawing properties. The group connection can constitute the acceptor material, which has excellent charge transport performance and can broaden the absorption of the material in the visible light region. When used as the acceptor material of organic solar cells, it has a high charge transport rate and a wide absorption spectrum. |