Journal
NANOSCALE
Volume 8, Issue 15, Pages 7849-7853Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6nr01435f
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Funding
- DFG IRTG [2022]
- NSERC
- Studienstiftung des Deutschen Volkes
- AITF
- Harry de Jur Chair in Applied Science
- Enrique Berman Chair in Solar Energy Research
- Focal Technology Area program within the Israel National Nanotechnology Initiative
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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.
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