1347736-80-4

Upstream product

• 172377-05-8 2,5-dibromo-4-fluoroaniline 
• 407-25-0 trifluoroacetic anhydride 
• 1435-52-5 2,5-dibromofluorobenzene 
• 366496-33-5 1,4-dibromo-2-fluoro-5-nitrobenzene 

Downstream Products

• 1347736-81-5 N-(2,5-dibromo-4-fluoro-6-nitrophenyl)-2,2,2-trifluoroacetamide 
• 1347736-82-6 2,5-dibromo-4-fluoro-6-nitroaniline 
• 1347736-83-7 3,6-dibromo-4-fluoro-1,2-phenylenediamine 
• 1347736-74-6 4,7-dibromo-5-fluoro-benzo[c][1,2,5]thiadiazole 

Relevant academic research and scientific papers

Synthesis and photovoltaic properties of copolymers with a fluoro quinoxaline unit

Two novel accepter units, namely, difluoroquinoxaline and monofluoroquinoxaline, were prepared and used for the synthesis of the conjugated polymers containing electron donor–acceptor pairs for use in organic photovoltaics. The introduction of a fluorine atom into the quinoxaline moiety resulted in polymers with lowered highest occupied molecular orbital (HOMO) energy levels; this increased the open circuit voltage of the devices based on the synthesized polymers. The conjugated polymers containing difluoroquinoxaline and monofluoroquinoxaline, namely, thiophene and benzodithiophene, were synthesized using the Stille polymerization reaction to produce PEHBQxF2, PEHBQxF1, PEHBDTQxF2, and PEHBDTQxF1. The HOMO energy levels of PEHBQxF2, PEHBQxF1, PEHBDTQxF2, and PEHBDTQxF1 were determined to be ?5.66, ?5.52, ?5.54, and ?5.39 eV, respectively. The device with PEHBDTQxF2/PC71BM (1:2, w/w) and containing diiodooctane (3 vol %) exhibited the best photovoltaic performance, with its VOC being 0.79 V, JSC being 10.44 mA/cm2, FF being 68%, and PCE being 5.58%.

Increased open circuit voltage in fluorinated benzothiadiazole-based alternating conjugated polymers

Small band-gap conjugated polymers based on monofluoro- and difluoro-substituted benzothiadiazole were developed. Highly efficient polymer solar cells (PCE as high as 5.40%) could be achieved for devices made from these polymers.