Visible Photoluminescence of Gas Phase Synthesized Well-Defined Germanium Oxide Nanoparticles

Abstract:

Substoichiometric germanium oxide nanoparticles were synthesized through gas aggregation process with a careful control on the size, composition and crystallinity of the nanoparticles. The nanoparticles show broad room temperature photoluminescence (PL) in the 470nm to 600nm wavelength region. The microstructure and optical properties of the nanoparticles were investigated. We found that the photoluminescence behavior of the nanoparticles is critically influenced by their compositions. Through temperature-dependent photoluminescence and time-resolved photoluminescence spectroscopy, we concluded that the broad PL band originated from the defects in the GeOx shell layers, rather than the quantum-confinement effect.

• Periodical: Applied Mechanics and Materials (Volume 618)
• Pages: 28-32
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.618.28
• Online since: August 2014
• Authors: Shang Xu*, Ya Li Nan, Ling Sun
• Keywords: Cluster Beam Deposition, Germanium Oxide Nanoparticles, Photoluminescence (PL)

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