Solution-processable, niobium-doped titanium oxide nanorods for application in low-voltage, large-area electronic devices

Alharthi, FA, Cheng, F, Verrelli, E, Kemp, NT, Lee, AF, Isaacs, MA, O'Neill, M ORCID: https://orcid.org/0000-0002-0232-5250 and Kelly, SM, 2018. Solution-processable, niobium-doped titanium oxide nanorods for application in low-voltage, large-area electronic devices. Journal of Materials Chemistry C, 6 (5), pp. 1038-1047. ISSN 2050-7526

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Abstract

We report for the first time the one-step synthesis of solution-processable, highly crystalline, niobium-doped titanium dioxide (Nb-TiO2) nanorods in the anatase phase by the hydrolytic condensation of Ti(OiPr)4 and niobium(V) ethoxide using oleic acid as a structure-directing and stabilising agent. These novel surface-stabilised nanorods can be easily dispersed in common solvents at relatively high concentration (∼10%) and deposited as uniform, thin and transparent films on planar substrates for the fabrication of electronic devices. The small size of the nanoparticles synthesized represents an important advance in achieving high-k dielectric thin films smooth enough to be suitable for OFET applications and the plastic electronics filed in general. Preliminary investigations show that the dielectric constant, k, of niobium-doped (7.1 wt%) titanium dioxide (Nb-TiO2) nanorods at frequencies in the region of 100 kHz–1 MHz, are more a third greater (k > 8) than that (k = 6) determined for the corresponding undoped titanium dioxide (TiO2) nanorods. The current–voltage (J–V) behaviour of these devices reveal that niobium-doping improves, by reducing, the leakage current of these devices, thereby preventing hard dielectric breakdown of devices incorporating these new nanorods.

Item Type:	Journal article
Publication Title:	Journal of Materials Chemistry C
Creators:	Alharthi, F.A., Cheng, F., Verrelli, E., Kemp, N.T., Lee, A.F., Isaacs, M.A., O'Neill, M. and Kelly, S.M.
Publisher:	Royal Society of Chemistry
Date:	2018
Volume:	6
Number:	5
ISSN:	2050-7526
Identifiers:	Number Type 10.1039/C7TC04197G DOI
Divisions:	Schools > School of Science and Technology
Record created by:	Jonathan Gallacher
Date Added:	15 Feb 2018 16:45
Last Modified:	29 Jul 2024 15:54
URI:	https://irep.ntu.ac.uk/id/eprint/32730

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