Hexa-peri-hexabenzocoronene (HBC) is a disc-shaped polycyclic aromatic hydrocarbon with remarkable self-association
properties. Solution processable alkyl substituted HBC compounds often exhibit discotic liquid crystalline behavior and
have been shown to carry charges efficiently in bulk. In recent years, fluorenyl HBC (FHBC) compounds have emerged
as promising materials for organic photovoltaics. The fluorene substituent imparts solution processability while
maintaining good charge transport characteristics. Power conversion efficiency close to 3% has been reported for organic
solar cell devices containing FHBC materials.