JOURNAL ARTICLE

Dithienobenzimidazole-based semiconducting polymer for nonfullerene organic photovoltaics.

  • Published In: Bulletin of the Chemical Society of Japan, 2025, v. 98, n. 3. P. 1 1 of 3

  • Database: Applied Science & Technology Source Ultimate 2 of 3

  • Authored By: Mikie, Tsubasa; Ono, Shohei; Hada, Momoka; Osaka, Itaru 3 of 3

Abstract

The article focuses on the design, synthesis, and characterization of dithienobenzimidazole (DTBI) as a novel building unit for semiconducting polymers in nonfullerene organic photovoltaic (OPV) cells. The DTBI-based polymer, named POBI, exhibits red-shifted absorption spectra and lower lowest unoccupied molecular orbital (LUMO) energy levels compared to related polymers, attributed to its enhanced quinoidal character. Photovoltaic devices combining POBI with the benchmark nonfullerene acceptor Y6 achieved a power conversion efficiency (PCE) of up to 6.3%, which is modest relative to benchmark polymers, likely due to reduced crystallinity and lower hole mobility caused by methyl substituents on DTBI that disrupt interchain interactions. The study suggests further molecular redesign of DTBI-based polymers to improve OPV performance.

Additional Information

  • Source:Bulletin of the Chemical Society of Japan. 2025/03, Vol. 98, Issue 3, p1
  • Document Type:Article
  • Subject Area:Environmental Sciences
  • Publication Date:2025
  • ISSN:00092673
  • DOI:10.1093/bulcsj/uoaf015
  • Accession Number:185489195
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