A novel donor–donor polymeric dyad of Poly(3-hexylthiophene-block-oligo(anthracene-9,10-diyl): Synthesis, solid-state packing, and electronic properties

Soundaram Jeevarathinam Ananthakrishnan, Jacob Strain, Niharika Neerudu Sreeramulu, Abu Mitul, Louis E. McNamara, Anastasiia Iefanova, Nathan I. Hammer, Qiquan Qiao, Hemali Rathnayake

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

A new polymeric dyad of oligo-anthracene-block-poly(3-hexylthiophene) (Oligo-ANT-b-P3HT) has been synthesized as a donor–donor dyad building block for organic photovoltaics. The polymer dyad and oligomer of anthracene-9,10-diyl (Oligo-ANT) are prepared by Grignard Metathesis. The higher order of crystallinity and molecular chains ordering at solid phase reveal the intrinsic optical and electrical properties of polymeric dyad resulting in relatively higher light harvesting ability compared to the oligo(anthracene-9,10-diyl). The UV-visible spectrum of (Oligo-ANT-b-P3HT) in solution shows broad absorption with two sets of absorption from both anthracene and thiophene core units, covering a wide range of the visible spectrum. The test devices of the blends of polymeric dyad with fullerene C61 (PCBM) show improved photovoltaic performance with a power conversion efficiency of 3.26% upon subjecting to pre-fabrication thermal treatments. With optimized morphology of the interpenetrating network and the shorter fluorescence lifetime of the annealed dyad/PCBM blends, the effective charge transfer from the donor dyad to PCBM has evidenced. Thus, these studies will allow further synthetic advances to make potential high crystalline polymeric dyads with significantly improved light harvesting capability.

Original languageEnglish (US)
Pages (from-to)3032-3045
Number of pages14
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume54
Issue number18
DOIs
StatePublished - Sep 15 2016
Externally publishedYes

Keywords

  • Diblock copolymers
  • Fullerenes
  • copolymerization
  • oligomers

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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