Abstract
Optoelectronic properties of Si nanocrystals (SiNCs) were studied by combining scanning tunneling spectroscopy (STS) and optical measurements. The photoluminescence (PL) of phenylacetylene functionalized SiNCs red shifts relative to hexyl- and phenyl-capped counterparts, whereas the absorption spectra and the band gaps extracted from STS are similar for all surface groups. However, an in-gap state near the conduction band edge was detected by STS only for the phenylacetylene terminated SiNCs, which can account for the PL shift via relaxation across this state.
Original language | English |
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Pages (from-to) | 7849-7853 |
Number of pages | 5 |
Journal | Nanoscale |
Volume | 8 |
Issue number | 15 |
DOIs | |
State | Published - 21 Apr 2016 |
Bibliographical note
Publisher Copyright:© 2016 The Royal Society of Chemistry.