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A hybrid heterojunction based on fullerenes and surfactant-free, self-assembled, closely packed silicon nanocrystals

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Svrcek, V, Mariotti, Davide, Shibata, Y and Kondo, M (2010) A hybrid heterojunction based on fullerenes and surfactant-free, self-assembled, closely packed silicon nanocrystals. Journal of Physics D: Applied Physics, 43 (41). p. 415402. [Journal article]

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URL: http://stacks.iop.org/0022-3727/43/i=41/a=415402

DOI: 10.1088/0022-3727/43/41/415402

Abstract

We demonstrate that nanosecond-pulsed laser chemistry in water leads to closely packed and stable luminescent assemblies of silicon nanocrystals (SiNCs) that can be electronically coupled with fullerenes (C 60 ) without any additional surfactant or catalyst. We show that the fragmentation time in water determines the photoluminescence (PL) intensity (>40%) and redshifts the PL maxima (45 nm) of the SiNCs. Heterojunction solar cells made out of these laser-produced self-assemblies of SiNCs and C 60 show photovoltaic action with increased quantum efficiency in the region where the absorption of SiNCs appears.

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:15901
Deposited By:Dr Davide Mariotti
Deposited On:12 Oct 2010 10:21
Last Modified:18 Dec 2012 13:14

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