Amorphous-to-crystalline phase transformation of thin film rubrene

Se Woong Park, Jeong Min Choi, Kwang Hyun Lee, Han Woong Yeom, Seongil Im, Young Kook Lee

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We report on the amorphous-to-crystalline phase transformation of rubrene thin films. The crystallization of the organic thin films displays disk-like domains whose nucleation and growth follow phase transformation kinetics well-established for inorganic materials under certain time and temperature conditions. We understood that the crystallization of amorphous rubrene thin film shows site-saturated nucleation behavior while the crystalline growth involves both diffusion and interface-controlled kinetics displaying spherulitic disk growth behavior. The activation energy of the transformation kinetics was about 0.78 eV on hexamethyldisilazane-functionalized SiO2 substrate as mostly consumed at the growth process. The crystallization kinetics changes with the film substrate; more hydrophobic substrate induces a lesser number of crystalline nuclei while causing faster growth of those nuclei.

Original languageEnglish
Pages (from-to)5661-5665
Number of pages5
JournalJournal of Physical Chemistry B
Volume114
Issue number17
DOIs
Publication statusPublished - 2010 May 6

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All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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