Kumari, Neelam and Naqvi, Samya and Kumar, Rachana (2018) Naphthalene diimide self-assembled ribbons with high electrical conductivity and mobility without doping. Journal of Materials Science, 53 (6). pp. 4046-4055. ISSN 0022-2461

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Abstract

The thermally activated electrical conductivity and charge transfer properties of self-assembled naphthalene diimide molecule have been studied with N,N'di(hexadecyl)naphthalene tetracarboxylic diimide (HD-NDI) derivative. The self-assembly of HD-NDI has been resulted in one-dimensional large micron-size ribbons. The aggregate formation and self-assembling property have been extensively studied by absorption, fluorescence and X-ray diffraction analysis. Absorption and fluorescence measurements were taken in variety of solvents in fresh and aged samples, and the study suggested J-type aggregation for self-assembly formation. The electrical conductivity of self-assembled HD-NDI material was measured as a function of temperature where the conductivity increased with temperature and the highest conductivity (1 x 10(-5) S/cm) was obtained at 250 A degrees C. SEM images clearly show the formation of ribbons of micron size. Further the electron transport property of HD-NDI was also evaluated by SCLC method at room temperature by fabricating electron-only devices with annealing the film at similar to 200 A degrees C. HD-NDI shows excellent electron mobility (1.8 x 10(-3) cm(2) V-1 s(-1)) because of effective channel formation due to self-assembly of HD-NDI molecules, and this material may find potential application in variety of electronic devices.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Springer Verlag.
Subjects:	Materials Science
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	20 Dec 2019 06:58
Last Modified:	20 Dec 2019 06:58
URI:	http://npl.csircentral.net/id/eprint/3753

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