Journal
INTERNATIONAL JOURNAL OF NANOSCIENCE
Volume 18, Issue 3-4, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0219581X1940088X
Keywords
Graphene; carbon nanotube; heterojunction; photodetector; pulsed laser
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Photodetectors (PDs) based on single-walled carbon nanotube film/silicon and graphene/ silicon heterojunctions have been realized for fast applications. We investigated the response of the PDs to femtosecond pulsed laser using a three-electrode configuration for photoconductive operations. Both junction PDs exhibit rise times of some nanoseconds, detecting light from ultraviolet (275 nm) to infrared (1150 nm). Applying a gate voltage V-G, the rise time decreases down to about 1 ns, making our devices comparable to most commercial PDs.
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