期刊
NANOSCALE
卷 8, 期 15, 页码 7849-7853出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6nr01435f
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资金
- 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
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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