title: Very low band gap thiadiazoloquinoxaline donor-acceptor polymers as multi-tool conjugated polymers.
abstract: Here we report on the synthesis of two novel very low band gap (VLG) donor-acceptor polymers (Eg ≤ 1 eV) and an oligomer based on the thiadiazoloquinoxaline acceptor. Both polymers demonstrate decent ambipolar mobilities, with P1 showing the best performance of ∼10(-2) cm(2) V(-1) s(-1) for p- and n-type operation. These polymers are among the lowest band gap polymers (≲0.7 eV) reported, with a neutral λmax = 1476 nm (P2), which is the farthest red-shifted λmax reported to date for a soluble processable polymer. Very little has been done to characterize the electrochromic aspects of VLG polymers; interestingly, these polymers actually show a bleaching of their neutral absorptions in the near-infrared region and have an electrochromic contrast up to 30% at a switching speed of 3 s.
authors.affiliation: Department of Chemical and Biological Engineering, Chalmers University of Technology , SE-412 96 Gothenburg, Sweden.
authors.forename: Timothy T
authors.initials: TT
authors.lastname: Steckler
authors.forename: Patrik
authors.initials: P
authors.lastname: Henriksson
authors.forename: Sonya
authors.initials: S
authors.lastname: Mollinger
authors.forename: Angelica
authors.initials: A
authors.lastname: Lundin
authors.forename: Alberto
authors.initials: A
authors.lastname: Salleo
authors.forename: Mats R
authors.initials: MR
authors.lastname: Andersson
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D015394:Molecular Structure; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D011789:Quantum Theory; D011810:Quinoxalines / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D011108:Polymers; D011810:Quinoxalines