Email this article Chemical composition of hybrid silicon nanoparticles and ultrafast dynamics of charge carriers
- Authors: Kompanets V.O.1, Chekalin S.V.1, Lazov M.A.2, Alov N.V.3, Ionov A.M.4, Dorofeev S.G.3, Barzilovich P.Y.5, Ryabov E.A.1, Bagratashvili V.N.6, Babkina S.S.2, Ischenko A.A.2
-
Affiliations:
- Institute of Spectroscopy
- Lomonosov State University of Fine Chemical Technology
- Faculty of Chemistry
- Institute of Solid State Physics
- Institute of Problems of Chemical Physics
- Institute of Problems of Laser and Information Technologies
- Issue: Vol 11, No 3-4 (2016)
- Pages: 128-136
- Section: Article
- URL: https://journals.rcsi.science/2635-1676/article/view/219167
- DOI: https://doi.org/10.1134/S1995078016020087
- ID: 219167
Cite item
Open Access
Access granted
Subscription Access
Abstract
The qualitative and quantitative composition of hybrid Si/SiOx/SiO2/OH(D) nanoparticles synthesized from silicon monoxide has been determined by X-ray photoelectron spectroscopy. The nanoparticles are composed of a Si crystalline core and a SiOx/SiO2/OH(D) shell, where SiOx is the interface of intermediate oxides corresponding to the Si1+, Si2+, and Si3+ valence states of silicon and SiO2/OH(D) is the external shell of the nanoparticle. The chemical composition and average stoichiometry of deuterated and nondeuterated nanoparticles have been determined; the identified compositions have been compared. The dependence of photoluminescent properties on the composition of the samples has been discussed. Two forms of hydrophilic silicon nanoparticles with identical crystalline cores—photoluminescent deuteriumpassivated particles oxidized in completely deuterated dimethylsulfoxide and nonphotoluminescent hydrogen- passivated reference samples oxidized in dimethylsulfoxide—have been studied by broadband femtosecond spectroscopy. It has been found that there are significant differences in the ultrafast spectral–temporal induced absorption dynamics of these two forms in the energy range corresponding to the calculated bandgap of the nanoparticles. The observed difference has been attributed to the specific features of the relaxation of excited charge carriers in the energy states responsible for photoluminescence in the red spectral region.
About the authors
V. O. Kompanets
Institute of Spectroscopy
Email: aischenko@yasenevo.ru
Russian Federation, ul. Fizicheskaya 5, Troitsk, Moscow, 142190
S. V. Chekalin
Institute of Spectroscopy
Email: aischenko@yasenevo.ru
Russian Federation, ul. Fizicheskaya 5, Troitsk, Moscow, 142190
M. A. Lazov
Lomonosov State University of Fine Chemical Technology
Email: aischenko@yasenevo.ru
Russian Federation, pr. Vernadskogo 86, Moscow, 119571
N. V. Alov
Faculty of Chemistry
Email: aischenko@yasenevo.ru
Russian Federation, Moscow, 19991
A. M. Ionov
Institute of Solid State Physics
Email: aischenko@yasenevo.ru
Russian Federation, ul. Akademika Osip’yana 2, Chernogolovka, Moscow oblast, 142432
S. G. Dorofeev
Faculty of Chemistry
Email: aischenko@yasenevo.ru
Russian Federation, Moscow, 19991
P. Yu. Barzilovich
Institute of Problems of Chemical Physics
Email: aischenko@yasenevo.ru
Russian Federation, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432
E. A. Ryabov
Institute of Spectroscopy
Email: aischenko@yasenevo.ru
Russian Federation, ul. Fizicheskaya 5, Troitsk, Moscow, 142190
V. N. Bagratashvili
Institute of Problems of Laser and Information Technologies
Email: aischenko@yasenevo.ru
Russian Federation, ul. Pionerskaya 2, Troitsk, Moscow, 142092
S. S. Babkina
Lomonosov State University of Fine Chemical Technology
Email: aischenko@yasenevo.ru
Russian Federation, pr. Vernadskogo 86, Moscow, 119571
A. A. Ischenko
Lomonosov State University of Fine Chemical Technology
Author for correspondence.
Email: aischenko@yasenevo.ru
Russian Federation, pr. Vernadskogo 86, Moscow, 119571
