Novel regular D–A-conjugated polymers based on 2,6-bis(6-fluoro-2-hexyl-2H-benzotriazol-4-yl)-4,4-bis(2-ethylhexyl)-4H-silolo[3,2-b:4,5-b′]dithiophene derivatives: Synthesis, optoelectronic, and electrochemical properties

M. L. Keshtov*, S. A. Kuklin, I. E. Ostapov, Fang-Chung Chen, A. R. Khokhlov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Regioregular (P1) and random (P2) polymers were prepared by the reaction of equimolar amounts of dibromides M2 or M3 with bis(stannyl) monomer M1. The regioregularity of the conjugated chain in P1 was shown to affect considerably its optical properties. The HOMO/LUMO values and electrochemical band gap for polymers P1 or P2 found by cyclic voltammetry are–5.40/–3.40,–5.31/–3.33, and 2.00/1.96 eV, respectively. The LUMO levels for P1 and P2 are located higher than for PC71BM (–4.3 eV) by 0.84 and 0.97 eV, respectively. The low-lying HOMO levels of P1 and P2 are favorable for the high value of open-circuit voltage and make these polymers attractable candidates for polymer solar cells.

Original languageEnglish
Pages (from-to)274-278
Number of pages5
JournalDoklady Chemistry
Volume470
Issue number1
DOIs
StatePublished - 1 Sep 2016

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