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

Alharthi, F. A.; Cheng, F.; Verrelli, E.; Kemp, N. T.; Lee, A. F.; Isaacs, M. A.; O’Neill, M.; Kelly, S. M.

Abstract

We report for the first time the one-step synthesis of solution-processable, highly crystalline, niobiumdoped 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 (B10%) 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 4 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.

Citation

Alharthi, F. A., Cheng, F., Verrelli, E., Kemp, N. T., Lee, A. F., Isaacs, M. A., …Kelly, S. M. (2017). Solution-processable, niobium-doped titanium oxide nanorods for application in low-voltage, large-area electronic devices. Journal of Materials Chemistry C, 6(5), 1038-1047. https://doi.org/10.1039/c7tc04197g

• Journal Article Type: Article
• Acceptance Date: Dec 27, 2017
• Online Publication Date: Dec 28, 2017
• Publication Date: Dec 28, 2017
• Deposit Date: Mar 2, 2018
• Publicly Available Date: Dec 29, 2018
• Print ISSN: 2050-7526
• Electronic ISSN: 2050-7534
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 6
• Issue: 5
• Pages: 1038-1047
• DOI: https://doi.org/10.1039/c7tc04197g
• Keywords: Materials Chemistry; General Chemistry
• Public URL: https://hull-repository.worktribe.com/output/698096
• Publisher URL: http://pubs.rsc.org/en/Content/ArticleLanding/2018/TC/C7TC04197G#!divAbstract
• Additional Information: : This document is Similarity Check deposited; CrossRef DOI Link to Correction:: https://doi.org/10.1039/C8TC90038H; : N. T. Kemp (ORCID); : N. T. Kemp (ResearcherID); : A. F. Lee (ORCID); : A. F. Lee (ResearcherID); : M. A. Isaacs (ORCID); : M. A. Isaacs (ResearcherID); : S. M. Kelly (ORCID); : Single-blind; : Received 13 September 2017; Accepted 27 December 2017; Accepted Manuscript published 28 December 2017; Advance Article published 17 January 2018; Version of Record published 1 February 2018