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The polarized carbon nanotube thin film LED

Kinoshita, Megumi and Steiner, Mathias and Engel, Michael and Small, Joshua P. and Green, Alexander A. and Hersam, Mark C. and Krupke, Ralph and Mendez, Emilio E. and Avouris, Phaedon (2010):
The polarized carbon nanotube thin film LED.
In: Optics Express, pp. 25738-25745, 18, (25), ISSN 1094-4087,
[Online-Edition: http://dx.doi.org/10.1364/OE.18.025738],
[Article]

Abstract

We demonstrate a light emitting p-i-n diode made of a highly aligned film of separated (99%) semiconducting carbon nanotubes, self-assembled from solution. By using a split gate technique, we create p- and n-doped regions in the nanotube film that are separated by a micron-wide gap. We inject p- and n-type charge carriers into the device channel from opposite contacts and investigate the radiative recombination using optical micro-spectroscopy. We find that the threshold-less light generation efficiency in the intrinsic carbon nanotube film segment can be enhanced by increasing the potential drop across the junction, demonstrating the LED-principle in a carbon nanotube film for the first time. The device emits infrared light that is polarized along the long axes of the carbon nanotubes that form the aligned film.

Item Type: Article
Erschienen: 2010
Creators: Kinoshita, Megumi and Steiner, Mathias and Engel, Michael and Small, Joshua P. and Green, Alexander A. and Hersam, Mark C. and Krupke, Ralph and Mendez, Emilio E. and Avouris, Phaedon
Title: The polarized carbon nanotube thin film LED
Language: English
Abstract:

We demonstrate a light emitting p-i-n diode made of a highly aligned film of separated (99%) semiconducting carbon nanotubes, self-assembled from solution. By using a split gate technique, we create p- and n-doped regions in the nanotube film that are separated by a micron-wide gap. We inject p- and n-type charge carriers into the device channel from opposite contacts and investigate the radiative recombination using optical micro-spectroscopy. We find that the threshold-less light generation efficiency in the intrinsic carbon nanotube film segment can be enhanced by increasing the potential drop across the junction, demonstrating the LED-principle in a carbon nanotube film for the first time. The device emits infrared light that is polarized along the long axes of the carbon nanotubes that form the aligned film.

Journal or Publication Title: Optics Express
Volume: 18
Number: 25
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Molekulare Nanostrukturen
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 08 Nov 2011 11:31
Official URL: http://dx.doi.org/10.1364/OE.18.025738
Identification Number: doi:10.1364/OE.18.025738
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