Near-infrared emission from mesoporous crystalline germanium

Journal Article · Wed Oct 15 00:00:00 EDT 2014 · AIP Advances

DOI:https://doi.org/10.1063/1.4898643· OSTI ID:22299625

Boucherif, Abderraouf; Aimez, Vincent; Arès, Richard ^[1]; Korinek, Andreas ^[2]

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1. Institut Interdisciplinaire d’Innovation Technologique (3IT), Université de Sherbrooke, 3000 Boulevard Université, Sherbrooke, J1K OA5, Québec (Canada)
2. Canadian Centre for Electron Microscopy, Brockhouse Institute for Materials Research, McMaster University, Hamilton, Ontario, L8S 4M1 (Canada)

Mesoporous crystalline germanium was fabricated by bipolar electrochemical etching of Ge wafer in HF-based electrolyte. It yields uniform mesoporous germanium layers composed of high density of crystallites with an average size 5-7 nm. Subsequent extended chemical etching allows tuning of crystallites size while preserving the same chemical composition. This highly controllable nanostructure exhibits photoluminescence emission above the bulk Ge bandgap, in the near-infrared range (1095-1360nm) with strong evidence of quantum confinement within the crystallites.

• OSTI ID: 22299625
• Journal Information: AIP Advances, Vol. 4, Issue 10; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
CHEMICAL COMPOSITION
DENSITY
ELECTROLYTES
GERMANIUM
NANOSTRUCTURES
PHOTOLUMINESCENCE