Journal ArticleDOI
Silicon quantum wire array fabrication by electrochemical and chemical dissolution of wafers
Reads0
Chats0
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
Lewis Acid Mediated Hydrosilylation on Porous Silicon Surfaces
Jillian M. Buriak,Michael P. Stewart,Todd W. Geders,Matthew J. Allen,Hee Cheul Choi,Jay Smith,Daniel Raftery,Leigh T. Canham +7 more
TL;DR: In this article, Lewis acid mediated hydrosilylation of alkynes and alkenes on non-oxidized hydride-terminated porous silicon derivatizes the surface with alkenyl and alkyl functionalities, respectively.
Journal ArticleDOI
FTIR Study of the Oxidation of Porous Silicon
TL;DR: In this paper, the oxidation of hydrogen-terminated porous silicon surfaces produced by electrochemical etching has been studied using transmission FTIR spectroscopy and two reactions are observed.
Journal ArticleDOI
Raman analysis of light‐emitting porous silicon
TL;DR: Porous silicon that strongly emits in the visible was analyzed using Raman scattering and it was shown that the local structure of porous silicon is more like a sphere than a rod and has a characteristic diameter of 2.5-3.0 nm as mentioned in this paper.
Journal ArticleDOI
Interfacial Charge Carrier Dynamics of Colloidal Semiconductor Nanoparticles
TL;DR: In this article, the dynamic properties of charge carriers at the liquid−semiconductor interface are studied using powerful time-resolved laser techniques, including trapping, recombination, and transfer, in a number of semiconductor nanoparticle systems.
Journal ArticleDOI
Identification of radiative transitions in highly porous silicon
TL;DR: In this paper, a time-resolved photoluminescence spectroscopy of highly porous silicon was performed and it was shown that the luminescence is due to localized quantum-confined excitons in undulating crystalline silicon wires.
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