Journal ArticleDOI
Silicon quantum wire array fabrication by electrochemical and chemical dissolution of wafers
TLDR
In this paper, free standing Si quantum wires can be fabricated without the use of epitaxial deposition or lithography using electrochemical and chemical dissolution steps to define networks of isolated wires out of bulk wafers.Abstract:
Indirect evidence is presented that free‐standing Si quantum wires can be fabricated without the use of epitaxial deposition or lithography. The novel approach uses electrochemical and chemical dissolution steps to define networks of isolated wires out of bulk wafers. Mesoporous Si layers of high porosity exhibit visible (red) photoluminescence at room temperature, observable with the naked eye under <1 mW unfocused (<0.1 W cm−2) green or blue laser line excitation. This is attributed to dramatic two‐dimensional quantum size effects which can produce emission far above the band gap of bulk crystalline Si.read more
Citations
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Journal ArticleDOI
Photoluminescence studies of ZnO/porous silicon nanocomposites
TL;DR: In this article, the authors reported on the intense broadband photoluminescence (PL) emission from the ZnO/porous silicon nanocomposite films, which could be used as a source of broadband luminescence across most of the visible spectrum.
Journal ArticleDOI
Electronic and mechanical properties of nanocrystalline composites when approaching molecular size
TL;DR: In this article, the authors summarize the recent progress in the research on the optoelectronic properties of semiconductor nanocrystals (nc) with emphasis on nc-Si/a-SiO2 composites in which the surface of the silicon nanocrystal are passivated and the crystallites are separated by the oxide.
Journal ArticleDOI
White-emitting oxidized silicon nanocrystals: Discontinuity in spectral development with reducing size
TL;DR: In this article, the photoluminescence (PL) spectrum from 680 down to 590 nm is blueshift with changes in PL dynamics accompanied by changes in surface oxide.
Journal ArticleDOI
Visible photoluminescence of silicon‐based nanostructures: Porous silicon and small silicon‐based clusters
Yoshihiko Kanemitsu,Katsunori Suzuki,Hiroshi Uto,Yasuaki Masumoto,Takahiro Matsumoto,Soichiro Kyushin,Koichi Higuchi,Hideyuki Matsumoto +7 more
TL;DR: In this paper, the optical properties of both porous Si and the chemically synthesized planar and cubic Si skeleton clusters were studied and compared, and it was shown that the surface of porous Si is similar to a condensation of Si clusters.
Journal ArticleDOI
Light Emission from Microcrystalline Si Confined in SiO2 Matrix through Partial Oxidation of Anodized Porous Silicon
TL;DR: In this article, the optical properties of microcrystalline Si embedded in a SiO2 matrix through a partial oxidation of anodized porous silicon using a wet process have been studied.
References
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Journal ArticleDOI
Electrolytic shaping of germanium and silicon
TL;DR: In this article, the properties of electrolyte-semiconductor barriers are described, with emphasis on germanium, and the use of these barriers in localizing electrolytic etching is discussed.
Journal ArticleDOI
Unusually low surface-recombination velocity on silicon and germanium surfaces.
TL;DR: It is found that a standard, widespread, chemical-preparation method for silicon, oxidation followed by an HF etch, results in a surface which from an electronic point of view is remarkably inactive, which has implications for the ultimate efficiency of silicon solar cells.
Journal ArticleDOI
Infrared spectroscopy of Si(111) and Si(100) surfaces after HF treatment: Hydrogen termination and surface morphology
TL;DR: In this paper, multiple internal infrared reflection spectroscopy has been used to identify the chemical nature of chemically oxidized and subsequently HF stripped silicon surfaces, and these very inert surfaces are found to be almost completely covered by atomic hydrogen.
Journal ArticleDOI
Hydrogen desorption kinetics from monohydride and dihydride species on silicon surfaces.
TL;DR: In this article, the authors measured hydrogen desorption from monohydride and dihydride species on crystalline-silicon surfaces using transmission Fourier-transform infrared (FTIR) spectroscopy.
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