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Issue 11, 2013
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Efficient green-luminescent germanium nanocrystals

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Abstract

Highly efficient ‘deep-green’ luminescent germanium nanocrystals (Ge NCs) have been synthesized by a one-step laser ablation process. The NCs are thoroughly characterized by TEM, Raman and optical spectroscopic techniques. The relationship between the size and the emission is investigated through spectroscopic analyses to reveal the appearance of the quantum confinement effect. Due to the strong quantum confinement of photogenerated carriers in diamond cubic Ge NCs and well-controlled size distribution, both a full width half maxima (FWHM) of the photoluminescence (PL) (about 55 nm) and a 17% absolute PL quantum yield (QY) of the Ge NCs in thin film form are drastically improved.

Graphical abstract: Efficient green-luminescent germanium nanocrystals

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Supplementary files

Article information


Submitted
26 Nov 2012
Accepted
11 Jan 2013
First published
11 Jan 2013

J. Mater. Chem. A, 2013,1, 3747-3751
Article type
Paper

Efficient green-luminescent germanium nanocrystals

B. Ghosh, Y. Sakka and N. Shirahata, J. Mater. Chem. A, 2013, 1, 3747
DOI: 10.1039/C3TA01246H

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