THz photoconductivity in light-emitting surface-oxidized Si nanocrystals: the role of large particles
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F14%3A00439724" target="_blank" >RIV/68378271:_____/14:00439724 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/1367-2630/16/9/093013" target="_blank" >http://dx.doi.org/10.1088/1367-2630/16/9/093013</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1367-2630/16/9/093013" target="_blank" >10.1088/1367-2630/16/9/093013</a>
Alternative languages
Result language
angličtina
Original language name
THz photoconductivity in light-emitting surface-oxidized Si nanocrystals: the role of large particles
Original language description
We propose an analytical description of the role of local depolarization fields in the terahertz conductivity of nanostructured samples and demonstrate this approach in a sample composed of silicon nanocrystals fabricated by electrochemical etching of silicon wafer followed by an oxidizing treatment. The post-etching treatment leads to a decrease in the average nanocrystalline Si core size which enhances luminescence in the visible range. We show that the dominating microscopic photoconductive responseof photocarriers is essentially Drude-like owing to the presence of a very small amount of large nanocrystals; the macroscopic character of the response is, however, deeply modified by the depolarization fields. Smaller nanocrystals appreciably con- tribute to the terahertz conductivity only at high photoexcitation densities where the screening due to depolarization fields suppresses the response of the large particles.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
New Journal of Physics
ISSN
1367-2630
e-ISSN
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Volume of the periodical
16
Issue of the periodical within the volume
Sep
Country of publishing house
DE - GERMANY
Number of pages
25
Pages from-to
"093013-1"-"093013-25"
UT code for WoS article
000342050600001
EID of the result in the Scopus database
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