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Electroluminescence from an electrostatically doped carbon nanotube field-effect transistor

Hughes, MA, Ohno, Y and Mizutani2, T 2014, 'Electroluminescence from an electrostatically doped carbon nanotube field-effect transistor' , Nanoscience and Nanotechnology Letters, 6 (10) , pp. 881-886.

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We report electroluminescence (EL) from a carbon nanotube field-effect transistor with split-gates. EL is generated by the electrostatic doping technique. Six EL bands could be observed, with the strongest band peaking between 0.867 and 0.850 eV with a full width at half maximum (FWHM) of 64 to 120 meV, depending on the bias conditions. From the EL peak position we estimate a CNT diameter of ∼1.05 nm. We also estimate the power and quantum efficiency of the EL to be around 1×10−6 and 1×10−5 respectively. With a fixed drain voltage, increasing the opposite split gate bias caused the EL to increase monotonically from zero, indicating an ambipolar emission mechanism. With a fixed opposite split gate bias the dependence of EL on drain voltage displays a threshold. Drain current is significantly higher when using equal, rather than opposite split gate biases, which we attribute to the trapping of carries by band bending when using opposite split gate bias.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Nanoscience and Nanotechnology Letters
Publisher: American Scientific Publishers
ISSN: 1941-4900
Related URLs:
Funders: MEXT
Depositing User: Dr Mark Hughes
Date Deposited: 10 Nov 2015 14:18
Last Modified: 05 Apr 2016 19:37

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