Structural Studies, Surface Properties, and Photoluminescence Behaviour of Silicon Nanocrystals

1991 ◽  
Vol 256 ◽  
Author(s):  
J. R. Heath ◽  
J. M. Jasinski
Keyword(s):  
Porous Silicon ◽  
Amorphous Silicon ◽  
Surface Properties ◽  
Silicon Nanocrystals ◽  
Silicon Nanoparticles ◽  
Excitation Frequency ◽  
Wavelength Dependence ◽  
Structural Studies ◽  
Size Dependent ◽  
Amorphous Silicon Nanoparticles

ABSTRACTA method for synthesizing crystalline and/or amorphous silicon nanoparticles (3 – 30 nm diameter) is discussed. The photoluminescence (PL) behaviour of these particles is studied as crystallinity, size, surface stoichiometry, and excitation frequency are varied. Orange-red photoluminescence (PL), similar to that reported for “porous silicon,” is observed. The wavelength dependence of this PL is not a function of size, but rather particle crystallinity. A separate PL feature, near 430 nm, is reported. No size dependent effects are observed for this feature.

Energetic characteristics of hydrogenated amorphous silicon nanoparticles

2021 ◽  
pp. 133140
Author(s):  
Feiyu Xu ◽  
Giorgio Nava ◽  
Prithwish Biswas ◽  
Isabelle Dulalia ◽  
Haiyang Wang ◽  
...  
Keyword(s):  
Amorphous Silicon ◽  
Silicon Nanoparticles ◽  
Hydrogenated Amorphous Silicon ◽  
Amorphous Silicon Nanoparticles ◽  
Hydrogenated Amorphous

scholarly journals Raman Amplifier Based on Amorphous Silicon Nanoparticles

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
M. A. Ferrara ◽  
I. Rendina ◽  
S. N. Basu ◽  
L. Dal Negro ◽  
L. Sirleto
Keyword(s):  
Raman Scattering ◽  
Amorphous Silicon ◽  
Silicon Nanoparticles ◽  
Stimulated Raman Scattering ◽  
Pump Laser ◽  
Great Promise ◽  
Threshold Power ◽  
Raman Lasers ◽  
Superlattice Structures ◽  
Amorphous Silicon Nanoparticles

The observation of stimulated Raman scattering in amorphous silicon nanoparticles embedded in Si-rich nitride/silicon superlattice structures (SRN/Si-SLs) is reported. Using a 1427 nm continuous-wavelength pump laser, an amplification of Stokes signal up to 0.9 dB/cm at 1540.6 nm and a significant reduction in threshold power of about 40% with respect to silicon are experimentally demonstrated. Our results indicate that amorphous silicon nanoparticles are a great promise for Si-based Raman lasers.

Oxidation Induced Giant Modulation in the Luminescence of Colloidal Amorphous Porous Silicon Nanoparticles

2015 ◽  
Vol 1748 ◽  
Author(s):  
Jehad K. El Demellawi ◽  
Dalaver H. Anjum ◽  
Sahraoui Chaieb
Keyword(s):  
Porous Silicon ◽  
Amorphous Silicon ◽  
Band Gap ◽  
Silicon Nanoparticles ◽  
Crystalline Silicon ◽  
Local Strain ◽  
Orbital Interactions ◽  
Novel Approach ◽  
Porous Silicon Nanoparticles ◽  
Chemical Procedure

ABSTRACTThe emission of crystalline silicon nanoparticles as well as nanowires can be tuned by varying their diameters. The diameter selection is achieved via a difficult chemical procedure that necessitates filtration which cannot be easily scaled up. Herein, we report a novel approach for producing and tuning the emission of freestanding colloidal of amorphous porous silicon nanoparticles (which should not be confused with bulk amorphous silicon nor with porous silicon) via a controlled oxidation without relying on size of nanoparticles. This oxidation increases local strain in the disordered network that causes orbital interactions which modifies the band-gap but a new hybridization.

Decay dynamics of visible luminescence in amorphous silicon nanoparticles

2000 ◽  
Vol 77 (2) ◽  
pp. 211-213 ◽  
Author(s):  
Yoshihiko Kanemitsu ◽  
Yunosuke Fukunishi ◽  
Takashi Kushida
Keyword(s):  
Amorphous Silicon ◽  
Silicon Nanoparticles ◽  
Visible Luminescence ◽  
Amorphous Silicon Nanoparticles
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