Issue 11, 2013
From the journal:

Journal of Materials Chemistry A

Efficient green-luminescent germanium nanocrystals†

Batu Ghosh,a   Yoshio Sakkab  and  Naoto Shirahata*abc  

* Corresponding authors

a International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, Japan
E-mail: SHIRAHATA.Naoto@nims.go.jo
Fax: +81-29-859-2401
Tel: +81-29-859-2743

b NIMS, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan

c PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan

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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Article information

DOI
https://doi.org/10.1039/C3TA01246H
Article type
Paper
Submitted
26 Nov 2012
Accepted
11 Jan 2013
First published
11 Jan 2013

J. Mater. Chem. A, 2013,1, 3747-3751

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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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