Light-induced conductance resonance in ultrasmall Si nanoparticles
- 11 September 2000
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 77 (11) , 1668-1670
- https://doi.org/10.1063/1.1308524
Abstract
Ultrasmall, uniform-size (∼1 nm) Si nanoparticles, dispersed from p-type boron-doped silicon, are reconstituted on a Si substrate. Electronic transport processes are studied by current–voltage spectroscopy at room temperature, using scanning tunneling microscopy, in a two-terminal configuration, under both dark conditions and light illumination. Unlike the dark conditions, we observe, under light irradiation, for negative tip biasing, a regular structure at ∼1.0 eV period. The series is discussed in terms of light-induced hole states that otherwise are highly infrequent in ultrasmall Si particles, under standard low doping.Keywords
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