Photo-induced charge transport in SiO2films containing Si nanocrystals

✍ Scribed by Suk-Ho Choi

• Book ID: 102620650
• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 127 KB
• Volume: 29
• Category: Article
• ISSN: 0749-6036
• DOI: 10.1006/spmi.2000.0968

✦ Synopsis

Photo-induced charge transport is reported in metal-insulator-semiconductor structures containing Si nanocrystals produced by ion implantion and annealing. Successive shifts in current-voltage (I -V ) and capacitance-voltage (C-V ) curves are shown to be induced by ultra-violet (UV) light exposure under no bias. These shifts are shown to be enhanced by the application of a negative bias voltage during illumination. The application of a positive bias voltage during illumination is shown to reverse the direction of the shifts in both the I -V and C-V curves. This behaviour can be explained by charging of the nanocrystals induced by photoionization of electrons and charge movements in the insulator layer.