Mohite, Aditya D. and Gopinath, Prasanth and Shah, Hemant M. and Alphenaar, Bruce W. (2008) Exciton dissociation and stark effect in the carbon nanotube photocurrent spectrum. NANO LETTERS, 8 (1). pp. 142-146.
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Official URL: http://dx.doi.org/10.1021/nl0722525
The field-dependent photocurrent spectrum of individual carbon nanotubes is measured using a displacement photocurrent technique. A series of peaks is observed in the photocurrent corresponding to both excitonic and free carrier transitions. The photocurrent peak corresponding to the ground state exciton increases by a factor of 200 beyond a critical electric field, and shows both red and blue shifts depending on the field regime. This provides evidence for field-induced mixing between excitonic and free carrier states.
|Subjects:||Physical Science > Nanophysics|
Physical Science > Nano objects
|Deposited By:||Anuj Seth|
|Deposited On:||12 Jan 2009 14:01|
|Last Modified:||20 Jan 2009 12:10|
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