Diketopyrrolopyrrole-based conjugated small molecules bearing two different acceptor moieties for organic solar cells

Eun Yi Ko, Suna Choi, Gi Eun Park, Dae Hee Lee, Min Ju Cho, Dong Hoon Choi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Three A1-D-A2-D-A1-type conjugated molecules (A: acceptor, D: donor), containing diketopyrrolopyrrole (DPP) acceptors, another weaker acceptor, and thiophenes as common donors, were synthesized. The molecules exhibited strong absorption from 500 nm to the near-IR wavelength region, and different molecular energy levels. The three molecules synthesized were applied in solar cells made with phenyl-C71-butyric acid methyl ester, and thienopyrroledione (TPD) (DPP)2 exhibited the highest power conversion efficiency of 3.37% owing to its appropriate internal morphology and relatively high open circuit voltage, which is conferred by its relatively low-lying highest occupied molecular orbital level.

Original languageEnglish
Pages (from-to)39-47
Number of pages9
JournalSynthetic Metals
Volume221
DOIs
Publication statusPublished - 2016 Nov 1

Keywords

  • Conjugated small molecule
  • Diketopyrrolopyrrole
  • Organic semiconductor
  • Power conversion efficiency
  • Solar cell

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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