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- Title
Photothermoelectric effects in single-walled carbon nanotube films: Reinterpreting scanning photocurrent experiments.
- Authors
St-Antoine, Benoit; Ménard, David; Martel, Richard
- Abstract
We revisit the mechanism leading to the photoresponse of locally illuminated single-walled carbon nanotube (SWNT) films deposited on substrates. Our study examines the impact of multiple device parameters and provides many evidences that the position-dependent photocurrent is dominated by photothermoelectric effects. The photoresponse arises from the temperature variations at the metal-nanotube film interfaces, where mismatches of the Seebeck coefficients are measured. Our work also stresses the impact of the substrates, electrode materials and post-thermal treatments on the amplitude and dynamics of the photoresponse. The knowledge gained should guide the future development of photothermoelectric devices and detectors based on SWNTs. [Figure not available: see fulltext.]
- Publication
Nano Research, 2012, Vol 5, Issue 2, p73
- ISSN
1998-0124
- Publication type
Article
- DOI
10.1007/s12274-011-0186-x