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
More filters
Journal ArticleDOI
Luminescent Colloidal Dispersion of Silicon Quantum Dots from Microwave Plasma Synthesis: Exploring the Photoluminescence Behavior Across the Visible Spectrum
TL;DR: In this article, a novel approach to produce luminescent silicon nanoparticles (Si-NPs) is developed, where single crystalline SiNPs are synthesized by pyrolysis of silane (SiH 4 ) in a microwave plasma reactor at very high production rates (0.1-10 gh -1 ).
Journal ArticleDOI
Silicon quantum dots: surface matters
TL;DR: The latest progress in this fascinating research field of SiQDs is summarized, with special attention given to surface-induced effects, such as the emergence of direct bandgap transitions, and collective effects in densely packed QDs,such as space separated quantum cutting.
Journal ArticleDOI
Thermally induced ultrasonic emission from porous silicon
TL;DR: In this article, the authors show that simple heat conduction from porous silicon to air results in high-intensity ultrasound without the need for any mechanical vibrational system, achieving an acoustic pressure of 0.1
Journal ArticleDOI
Photoluminescence of high porosity and of electrochemically oxidized porous silicon layers
A. Bsiesy,J. C. Vial,F. Gaspard,R. Herino,M. Ligeon,F. Muller,R. Romestain,A. Wasiela,A. Halimaoui,G. Bomchil +9 more
TL;DR: In this paper, it was shown that strong visible photoluminescence can be obtained directly from as-formed high-porosity porous silicon samples, without need for subsequent chemical dissolution.
Journal ArticleDOI
Visible electroluminescence from porous silicon np heterojunction diodes
TL;DR: In this article, the preparation of silicon-based visible light-emitting diodes, configured as heterojunctions between porous silicon (formed by electrochemical etching of p-type silicon wafers), and n-type indium tin oxide (ITO), was reported.
References
More filters
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.
Related Papers (5)
The structural and luminescence properties of porous silicon
Visible light emission due to quantum size effects in highly porous crystalline silicon
A. G. Cullis,Leigh T. Canham +1 more