Photoluminescence of Functionalized Germanium Nanocrystals Embedded in Arsenic Sulfide Glass

Tingyi Gu, Jia Gao, Evgeny E. Ostroumov, Hyuncheol Jeong, Fan Wu, Romain Fardel, Nan Yao, Rodney D. Priestley, Gregory D. Scholes, Yueh Lin Loo, Craig B. Arnold

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Embedding metallic and semiconductor nanoparticles in a chalcogenide glass matrix effectively modifies the photonic properties. Such nanostructured materials could play an important role in optoelectronic devices, catalysis, and imaging applications. In this work, we fabricate and characterize germanium nanocrystals (Ge NCs) embedded in arsenic sulfide thin films by pulsed laser ablation in aliphatic amine solutions. Unstable surface termination of aliphatic groups and stable termination by amine on Ge NCs are indicated by Raman and Fourier-transform infrared spectroscopy measurements. A broad-band photoluminescence in the visible range is observed for the amine functionalized Ge NCs. A noticeable enhancement of fluorescence is observed for Ge NCs in arsenic sulfide, after annealing to remove the residual solvent of the glass matrix.

Original languageEnglish (US)
Pages (from-to)18911-18917
Number of pages7
JournalACS Applied Materials and Interfaces
Volume9
Issue number22
DOIs
StatePublished - Jun 7 2017

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Keywords

  • chalcogenide glass
  • laser ablation
  • nanocrystals
  • photoluminescence
  • solution process

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