Synthesis and photoluminescence of ultra-pure germanium nanoparticles

Date

2011-09-01

Author

Chivas, R.
Yerci, Selçuk
Li, R.
Dal Negro, L.
Morse, T. F.

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We have used aerosol deposition to synthesize defect and micro-strain free, ultra-pure germanium nanoparticles. Transmission electron microscopy images show a core-shell configuration with highly crystalline core material. Powder X-ray diffraction measurements verify the presence of highly pure, nano-scale germanium with average crystallite size of 30 nm and micro-strain of 0.058%. X-ray photoelectron spectroscopy demonstrates that GeOx (x <= 2) shells cover the surfaces of the nanoparticles. Under optical excitation, these nanoparticles exhibit two separate emission bands at room temperature: a visible emission at 500 nm with 0.5-1 ns decay times and an intense near-infrared emission at 1575 nm with up to similar to 20 mu s lifetime.

Subject Keywords

Nanocrystals, Light emission, Germanium materials, Aerosol synthesis

URI

https://hdl.handle.net/11511/31644

Journal

OPTICAL MATERIALS

DOI

https://doi.org/10.1016/j.optmat.2011.07.009

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

R. Chivas, S. Yerci, R. Li, L. Dal Negro, and T. F. Morse, “Synthesis and photoluminescence of ultra-pure germanium nanoparticles,” OPTICAL MATERIALS, pp. 1829–1832, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31644.