Design of novel thiazolothiazole-based conjugated polymer for efficient fullerene and non-fullerene organic solar cells

Petr M. Kuznetsov, Pavel I. Proshin, Sergey L. Nikitenko, Alina V. Lolaeva, Sergey G. Vasil'ev, Pavel A. Troshin, Alexander V. Akkuratov

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

We report the synthesis of novel low bandgap conjugated polymer P1 comprising thiazolothiazole, benzothiadiazole and thiophene units and investigation its photovoltaic properties in organic solar cells with [70]PCBM ([6,6]-phenyl-C71-butyric acid methyl ester) and high-performing non-fullerene IT-4F acceptor (9-bis(2-methylene-((3-(1,1-dicyanomethylene)-6,7-difluoro)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2’,3’-d’]-s-indaceno [1,2-b:5,6-b’]dithiophene). Polymer P1 showed promising results in both fullerene and non-fullerene organic solar cells. In particular, P1/IT-4F blends demonstrated enhanced charge carrier mobilities and suppressed trap-assisted recombination, which resulted in impressive short-circuit current densities and decent power conversion efficiency of 8.8 % in solar cells. The fullerene-based devices delivered efficiency of 8.2 % with remarkably high open-circuit voltages. The obtained results feature conjugated polymers based on thiazolothiazole as promising absorber materials for organic solar cells.

Original languageEnglish
Article number116508
JournalSynthetic Metals
Volume268
DOIs
Publication statusPublished - Oct 2020

Keywords

  • Blade coating
  • Fullerene derivatives
  • Non-fullerene acceptor
  • Organic solar cells
  • Thiazolothiazole

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