Synthesis of diketopyrrolopyrrole (DPP)-based small molecule donors containing thiophene or furan for photovoltaic applications

Yujeong Kim, Chang Eun Song, Ara Cho, Jungwoon Kim, Yoonho Eom, Jongho Ahn, Sang Jin Moon, Eunhee Lim

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Two π-conjugated small molecules based on diketopyrrolopyrrole (DPP), DPP4T and DPP2F2T, were synthesized using the Suzuki coupling reaction. DPP4T and DPP2F2T contained furan and thiophene, respectively, next to a DPP core. Organic photovoltaic cells (OPVs) were fabricated using two DPP-based oligothiophenes as donors. DPP4T showed higher power conversion efficiency (PCE) (1.44%) than DPP2F2T (0.85%). The short-circuit current (JSC) of DPP4T (4.38 mA cm-2) was nearly twice that of DPP2F2T (2.49 mA cm-2). The improved photovoltaic properties of DPP4T could be explained by the optical properties and the film morphology.

Original languageEnglish
Pages (from-to)825-829
Number of pages5
JournalMaterials Chemistry and Physics
Volume143
Issue number2
DOIs
StatePublished - 15 Jan 2014

Keywords

  • Electronic materials
  • Organic compounds
  • Semiconductors
  • Thin films

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