Combination of donor characters in a donor-acceptor-donor (DAD) type polymer containing benzothiadiazole as the acceptor unit


Sendur M., Balan A., Baran D., Karabay B., Toppare L.

ORGANIC ELECTRONICS, vol.11, no.12, pp.1877-1885, 2010 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 11 Issue: 12
  • Publication Date: 2010
  • Doi Number: 10.1016/j.orgel.2010.09.001
  • Title of Journal : ORGANIC ELECTRONICS
  • Page Numbers: pp.1877-1885
  • Keywords: Conjugated polymers, Electrochromism, Donor-acceptor theory, Copolymers, p- and n-doping, ORGANIC SOLAR-CELLS, ELECTROCHROMIC POLYMERS, CONJUGATED POLYMERS, PROCESSABLE GREEN, GAP, ELECTROCHEMISTRY, QUINOXALINES, COPOLYMERS, MONOMERS, DEVICES

Abstract

benzothiadiazole bearing donor-acceptor-donor (D-A-D) type monomer (M(3)) was synthesized using the combination of 3, 4-ethylenedioxythiophene (EDOT) and thiophene donor units to understand the effect of donor strength on the optoelectronic and electrochemical properties. The resulting monomer was polymerized electrochemically (P(3)) and compared with its symmetrical thiophene (P(1)) and EDOT (P(2)) bearing homologues whether there exists a combination of the electrochemical and optical characteristics. Also, copolymer studies were performed with symmetrical thiophene (M(1)) and EDOT (M(2)) containing monomers in order to compare the results with P(3). Cyclic voltammetry (CV) and spectro-electrochemistry results revealed that P(3) is a low band gap polymer (1.18 eV) having both p-and n-type property which is superior to the copolymers synthesized using M(1) and M(2). (C) 2010 Elsevier B. V. All rights reserved.