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Structural and Optical Properties of Oxygenated Silicon Quantum Dots
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
2011 (English)In: Advanced Science Letters, Vol. 4, no 11-12, 3580-3584 p.Article in journal (Refereed) Published
Abstract [en]

Silicon quantum dots of size as small as 1 nm in diameter were prepared by wet chemical route. These clusters are found to be covered with oxygen and hydrocarbon molecules. The optical measurements reveal strong absorption around 4.67 eV and weak absorption at lower energies. The clusters show a broad luminescence around 3.87 eV. These quantum dots are modeled using <i>ab-initio</i> Car Parinello Molecular Dynamics and computational studies explain the absorption spectrum of the clusters over observed energy range. In principle, these quantum dots can be useful as scintillating layer on crystalline silicon solar cells to enhance the photovoltaic efficiency.

Place, publisher, year, edition, pages
2011. Vol. 4, no 11-12, 3580-3584 p.
National Category
Atom and Molecular Physics and Optics
URN: urn:nbn:se:uu:diva-265249DOI: 10.1166/asl.2011.1909OAI: oai:DiVA.org:uu-265249DiVA: diva2:864866
Available from: 2015-10-26 Created: 2015-10-26 Last updated: 2015-10-26

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Publisher's full texthttp://www.ingentaconnect.com/content/asp/asl/2011/00000004/F0020011/art00044

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Chakraborty, Sudip
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