Nano Archive

Exciton dissociation and stark effect in the carbon nanotube photocurrent spectrum

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

Abstract

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.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
ID Code:2940
Deposited By:Anuj Seth
Deposited On:12 Jan 2009 14:01
Last Modified:20 Jan 2009 12:10

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