Highly bright and sharp light emission of a single nanoparticle of crystalline rubrene

Dong Hyuk Park, Seong Gi Jo, Young Ki Hong, Chunzhi Cui, Hyunsoo Lee, Dong June Ahn, Jeongyong Kim, Jinsoo Joo

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

We report on the fabrication and nanoscale luminescence characteristics of an isolated rubrene single nanoparticle (NP). A solvent-vapor annealing process changed pristine rubrene NPs, prepared by a reprecipitation method, to perfect crystalline NPs. The formation and structural properties of crystalline and non-crystalline rubrene NPs were studied through SEM, HR-TEM, and X-ray diffraction experiments. The nanoscale photoluminescence (PL) characteristics and the luminescence color of the rubrene single NP were measured using a high-resolution laser confocal microscope with color charge-coupled device images. In comparison with the pristine rubrene NPs, the crystalline NPs exhibited highly bright and sharp light emission. The main PL peak at 561-562 nm for the crystalline rubrene single NP had a relatively narrow line-width and became more dominant through a solvent-vapor annealing. The enhanced and sharp light emission of the crystalline rubrene single NP originated from the strong π-π interaction of rubrene molecules along the major crystalline axis in the nano-sized structure.

Original languageEnglish
Pages (from-to)8002-8007
Number of pages6
JournalJournal of Materials Chemistry
Volume21
Issue number22
DOIs
Publication statusPublished - 2011 Jun 14

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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