Molecular crystallization of rubrene thin films assisted by gold nanoparticles

Krishna P. Dhakal, Jinsoo Joo, Jeongyong Kim

Research output: Contribution to journalArticlepeer-review

Abstract

We demonstrate that crystalline organic rubrene thin films can be obtained by a facile spin-coating method using gold (Au) nanoparticles (NPs). Dodecanethiol-functionalized Au NPs were dissolved with rubrene molecules in solvent and a thin film of Au/rubrene was prepared by a simple spin coating process. The results of confocal photoluminescence (PL) and absorption spectral mapping confirmed the local formation of orthorhombic crystalline structures of the Au/rubrene hybrid film, in contrast to the monoclinic structure of plain rubrene films. Further, the results of transmission electron microscopy (TEM) and X-ray diffraction analysis, as well as Raman spectroscopy measurements of the rubrene and Au/rubrene films suggested the formation of high crystalline Au/rubrene film. The molecular crystallization of the Au/rubrene hybrid film is attributed to the nucleation effect of the Au NPs.

Original languageEnglish
Pages (from-to)304-310
Number of pages7
JournalCurrent Applied Physics
Volume39
DOIs
Publication statusPublished - 2022 Jul

Keywords

  • Crystalline
  • Nanoparticles
  • Nucleation
  • PL
  • Raman
  • Rubrene
  • Spin coating

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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