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

V Svrcek, D Mariotti, Y Shibata, M Kondo

Research output: Contribution to journalArticle

36 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)415402
JournalJournal of Physics D: Applied Physics
Volume43
Issue number41
DOIs
Publication statusPublished - 2010

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