Oriented Thin Films of the Low-Band-Gap Polymer PTB7 by Friction Transfer Method

Nobutaka Tanigaki, Claire Heck, Toshiko Mizokuro, Yousei Shibata, Tetsuhiko Miyadera, Tomoyuki Koganezawa

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Low-band-gap polymers are promising materials for organic photovoltaic application. We prepared an oriented thin film of a low-band-gap polymer, PTB7, by friction transfer method. The oriented film showed a strong dichroic absorption in the whole visible range. The orientation of molecular chain was characterized by two-dimensional grazing incident X-ray diffraction (2D-GIXD) with synchrotron radiation. 2D-GIXD results showed PTB7 molecular plane parallel to the substrate plane, i.e., "face on orientation."

Original languageEnglish
Pages (from-to)118-123
Number of pages6
JournalMolecular crystals and liquid crystals
Issue number1
Publication statusPublished - 2015 Nov 2
Externally publishedYes


  • X-ray diffraction
  • low-band-gap polymer
  • molecular alignment
  • polarized light
  • thin films

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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