Benzothiadiazole conjugated polymers

E. Bundgaard, E C. Krebs, Low-Band-Gap Conjugated Polymers Based on Thiophene, Benzothiadiazole, and Benzobis(thiadiazole). Macromolecules 2006, 39,2823-2831. 

Mei JG, Heston NC, Vasilyeva SV, Reynolds JR (2009) A facile approach to defect-free vinylene-linked benzothiadiazole-thiophene low-bandgap conjugated polymers for organic electronics. Macromolecules 42 1482... 

Bo et al. reported the synthesis of a series of D-A alternating conjugated polymers P24-31 with 5,6-bis(octyloxy)benzothiadiazole as the acceptor unit by Suzuki polyeondensation of dibromo monomers and 5,6-bis(octyloxy)benzo-thiadiazole based diboronic acid pinacol ester. P24) with a of 102 kg mol and a PDI of 1.66, gave a PCE of 5.08% in devices with P24 PC7iBM as the active... 

P. Herguth, X. Jiang, M.S. Liu, and A.K.-Y. Jen, Highly efficient fluorene and benzothiadiazole-based conjugated copolymers for polymer light-emitting diodes, Macromolecules, 35 6094-6100, 2002. 

Another series of Pt acetylide based polymer 30 was synthesized by Wong et al. (Scheme 15).93 The conjugated system is based on bithienyl benzothiadiazole,... 

Andersson and coworkers have prepared solar cells based on blends of poly(2,7-(9-(2 -ethylhexyl)-9-hexyl-fluorene)-fl/t-5,5-(4, 7 -di-2-thienyl-2, l, 3 -benzothiadiazole) (223) and PCBM [416]. The polymer shows a Amax (545 nm) with a broad optical absorption in the visible spectrum and an efficiency of 2.2% has been measured under simulated solar light. The same group has also reported the synthesis of low bandgap polymers 200 (1 = 1.25 eV) and 224 (1 = 1.46 eV) which have been blended with a soluble pyrazolino[70]fiillerene and PCBM, respectively, to form bulk heterojunction solar cells of PCE of 0.7% [417] and 0.9% [418]. Incorporation of an electron-delident silole moiety in a polyfluorene chain affords an alternating conjugated copolymer (225) with an optical bandgap of 2.08 eV. A solar cell based on a mixture 1 4 of 225 and PCBM exhibits 2.01% of PCE [419]. 

Zhang S, Guo Y, Fan H, Liu Y, Chen H-Y, Yang G, Zhan X, Liu Y, Li Y, Yang Y (2009) Low bandgap pi-conjugated copolymers based on fused thiophenes and benzothiadiazole synthesis and structure-property relationship study. J Polym Sci A Polym Chem 47 5498... 

---