The effect of TiN deposition time on the field-emission performance coated on ZnO nanorod arrays. Issue 19 (1st October 2021)

• Record Type: Journal Article
• Authors: Ma, L.A.; Chen, Y.B.; Ye, X.Y.; Sun, L.; Wei, Z.H.; Huang, L.; Chen, H.X.; Wang, Q.T.; Chen, E.G.
• Is Part Of: Ceramics international. Volume 47:Issue 19(2021)
• Page Start: 27487
• Page End: 27495
• Publication Date: 2021-10-01
• Subjects: ZnO nanorods -- Coating -- TiN -- Field emission; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.06.172
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: ZnO nanorod arrays (NRs) with a large number of sharp tips and uniform shapes were grown on the carbon cloth (CC) by a simple hydrothermal method. Titanium nitride (TiN) nanoparticles with various thicknesses were deposited on the ZnO NRs by magnetron sputtering to obtain ZnO/TiN core-shell arrays. Field emission (FE) performance of ZnO NRs show close dependence on TiN coating thickness. The turn-on field first decreases and then increases with increasing TiN coating thickness from 60 nm to 300 nm. The arrays with a design architecture can strike a balance between increased emission sites and limited field shielding effects. ZnO/TiN240 core-shell NRs have the lower turn-on electric field at 0.79 V/μm and the higher current densities at 9.39 mA/cm 2 . The field enhancement factor (β) of ZnO/TiN240 is about 3.2 times that of the bare ZnO NRs. On the other hand, the electrochemical properties were improved due to the formation of core-shell heterojunction on the ZnO/TiN interface and porous structure, which makes the ion and charge transport more convenient. Hence, this work not only revealed that the ZnO/TiN core-shell structure exhibited excellent improvement in both FE and supercapacitors applications, but also that growing arrays on CC was expected to achieve flexible display.