Star-shaped and linear TT-conjugated oligomers consisting of a tetrathienoanthracene core and multiple diketopyrrolopyrrole arms for organic solar cells

Hideaki Komiyama, Chihaya Adachi, Takuma Yasuda

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Solution-processable star-shaped and linear π-conjugated oligomers consisting of an electron-donating tetrathienoanthracene (TTA) core and electron-accepting diketopyrrolopyrrole (DPP) arms, namely, TTA-DPP4 and TTA-DPP2, were designed and synthesized. Based on density functional theory calculations, the star-shaped TTA-DPP4 has a larger oscillator strength than the linear TTA-DPP2, and consequently, better photoabsorption property over a wide range of visible wavelengths. The photovoltaic properties of organic solar cells based on TTA-DPP4 and TTA-DPP2 with a fullerene derivative were evaluated by varying the thickness of the bulk heterojunction active layer. As a result of the enhanced visible absorption properties of the star-shaped ?-conjugated structure, better photovoltaic performances were obtained with relatively thin active layers (40-60 nm).

Original languageEnglish
Pages (from-to)1459-1466
Number of pages8
JournalBeilstein Journal of Organic Chemistry
Volume12
DOIs
Publication statusPublished - Jul 14 2016

All Science Journal Classification (ASJC) codes

  • Organic Chemistry

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