Carrier trapping and confinement in Ge nanocrystals surrounded by Ge3N4

We investigated the optical properties of Ge nanocrystals surrounded by Ge 3 N 4 . The broad emission ranging from infrared to blue is due to the dependence on the crystal size and preparation methods. Here, we report high resolution Photoluminescence (PL) attributed to emission from individual Ge n...

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Bibliographic Details
Published in:Scientific reports 2016-05, Vol.6 (1), p.25449-25449, Article 25449
Main Authors: Park, Youngsin, Chan, Christopher C. S., Reid, Benjamin P. L., Nuttall, Luke, Taylor, Robert A., Lee, Nam-Suk, Lee, Young Mi
Format: Article
Language:English
Subjects:
639/766/1130/2799
639/766/94
Annealing
Crystals
Emissions
Energy
Humanities and Social Sciences
Laboratories
Luminescence
Microscopy
multidisciplinary
Nanocrystals
Optical properties
Photons
Science
Science (multidisciplinary)
Temperature effects
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Summary:We investigated the optical properties of Ge nanocrystals surrounded by Ge 3 N 4 . The broad emission ranging from infrared to blue is due to the dependence on the crystal size and preparation methods. Here, we report high resolution Photoluminescence (PL) attributed to emission from individual Ge nanocrystals ( nc -Ge) spatially resolved using micro-photoluminescence and detailed using temperature and power-dependent photoluminescence studies. The measured peaks are shown to behave with excitonic characteristics and we argue that the spread of the nc -Ge peaks in the PL spectrum is due to different confinement energies arising from the variation in size of the nanocrystals.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep25449