Journal ArticleDOI
Silicon quantum wire array fabrication by electrochemical and chemical dissolution of wafers
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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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Patent
Silicon nanosponge particles
TL;DR: Silicon nanosponge particles (10) prepared from a metallurgical grade silicon powder having an initial particle size ranging from about 1 micron to about 4 microns are presented in this paper.
Journal ArticleDOI
Biomedical applications of nanostructured porous silicon: a review
TL;DR: The particular morphology and overall properties of nanostructured porous silicon allow the use of this material in the fields of drug delivery, eye diseases, tumor imaging, and tissue engineering.
Journal ArticleDOI
Surface passivated silicon nanocrystals with stable luminescence synthesized by femtosecond laser ablation in solution
Dezhi Tan,Zhijun Ma,Beibei Xu,Ye Dai,Guohong Ma,Min He,Zuanming Jin,Jianrong Qiu,Jianrong Qiu +8 more
TL;DR: These silicon nanocrystals offer stable luminescence and are synthesized through a "green" and simple route and may find important applications in many fields, such as bioimaging and environmental science.
Book ChapterDOI
Porous silicon: material processing, properties and applications
TL;DR: In this paper, the authors show that porosity and thickness gradients are induced by a lateral potential drop along the bulk of the silicon wafer, which leads to different values of the local current density.
Journal ArticleDOI
Efficiency improvement by porous silicon coating of multicrystalline solar cells
Arūnas Krotkus,K. Grigoras,Vaidas Pačebutas,István Bársony,Eva Vazsonyi,Miklos Fried,Jozef Szlufcik,Johan Nijs,Claude Lévy-Clément +8 more
TL;DR: Shallow junction multicrystalline Si solar cells have been processed by an anodical etching technique and more than 25% improvement in short-circuit current and photovoltaic energy conversion efficiency was demonstrated.
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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