2-(2,3,4,5,6-Pentafluorophenyl)-1H-benzo[d]imidazole, a fluorine-rich building block for the preparation of conjugated polymer donors for organic solar cell applications

High-performance fluorine-containing BDT-based copolymer for organic solar cells with a high open circuit voltage

“…Moreover, the highest occupied molecular orbital (HOMO) energy level of the donor polymer should be lowered so as to increase the open circuit voltage ( V OC ), because V OC is directly proportional to the difference between the HOMO level of the donor polymer and the lowest unoccupied molecular orbital (LUMO) level of the fullerene acceptor . Since the fluorine atom is a strongly electron‐withdrawing substituent, the introduction of fluorine atoms into the conjugated backbone is expected to lower both the HOMO and LUMO levels of a conjugated polymer . Benzo[1,2‐b:4,5‐b’]dithiophene (BDT) has attracted much interest as a new building block for donor polymers.…”

Polymer design for solar cell – Current trend and future scenario

“…Choulis et al synthesised fluorene with pentafluorophenyl substituted benzimidazole (P162). The PSC was tested with PC 60 BM showed unfavourable band gap, and PCE of less than 1% [147].…”

Synthesis and characterization of poly(tetraphenylimidazole)s and their application in the detection of fluoride ions

“…Several methodologies have been reported for the incorporation of imidazole moieties into the backbone of the polymers. [46][47][48][49][50] However, in comparison with polymers that contain imidazoles in the main chain, polymers with imidazoles especially tetraarylimidazoles as side-chain have received far less attention and the side chain functionalization of imidazoles has not been systematically studied. [51][52][53][54][55] Recently, Lu and co-workers 56 have reported long uorescence lifetime europium-complexes of imidazole.…”