Tranport and confinement in silicon nanocrystals and porous silicon
Conference
·
OSTI ID:370800
- AT&T Bell Labs., Murray Hill, NJ (United States)
Optical and structural characterization of surface oxidized Si nanocrystals shows the long lived red photoluminescence can be assigned to volume quantum confinement in {approximately}1.5 nm Si nanocrystals. The particles remain indirect gap at this small size. The photoluminescence quantum yield increases, with respect to bulk Si, because radiationless transitions decrease drastically in nanocrystal Si. The remarkable difference in conductivity, electroluminescence, and photoconductivity between wet and dry porous-Si is related to direct electron-polar molecule coupling in electron transport, as in Marcus theory.
- OSTI ID:
- 370800
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
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