Crystalline Alloys of Organic Donors and Acceptors Based on TIPS-Pentacene

Jes B. Sherman, Kai Moncino, Tunna Baruah, Guang Wu, Sean R. Parkin, Balaji Purushothaman, Rajendra Zope, John Anthony, Michael L. Chabinyc

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Co-crystals of organic semiconductors can provide model systems for the study of fundamental optoelectronic properties and also new functionality. 6,13-Bis(triisopropylsilylethynyl)pentacene (TIPS-Pn) and its fluorinated analogue 1,2,3,4,8,9,10,11-octafluoro-bis(triisopropylsilylethynyl)pentacene (F8TIPS-Pn) form crystalline substitutional alloys during bulk crystal growth from solution. Alloys can also be formed by blade casting thin films from solution. The compounds appear to have sufficient geometric similarity to be miscible in all proportions without inducing long-range disorder in the solid state. The offsets of the electronic levels of TIPS-Pn and F8TIPS-Pn in pure form are similar to those found in bulk heterojunction solar cells. UV/vis spectroscopy and density functional theory demonstrate the charge transfer absorption in the alloy crystals corresponds to an excitation across molecular pairs.

Original languageEnglish
Pages (from-to)20823-20832
Number of pages10
JournalJournal of Physical Chemistry C
Issue number36
StatePublished - Sep 10 2015

Bibliographical note

Publisher Copyright:
© 2015 American Chemical Society.

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy (all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films


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