Enhanced field emission characteristics in metal-coated Si-nanocones

Yuan Ming Chang*, Pin Hsu Kao, Hung Ming Tai, Hau Wei Wang, Chih Ming Lin, Hsin Yi Lee, Jenh-Yih Juang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Metallic gold (Au) and platinum (Pt) thin films were deposited on silicon nanocones (Si-NCs) by sputtering to elucidate the effects of work function and conductivities on the field electron emission characteristics of surface-modified Si-NCs. The results showed that for Pt/Si-NCs and Au/Si-NCs, although the turn-on field defined at a corresponding current density of 10 μA cm-2 only improved from 4.20 V μm-1 for bare Si-NCs to 3.65 and 2.90 V μm-1, respectively, the emission current density measured at 5.00 V μm-1 was enhanced by orders of magnitude, reaching 1.82 mA cm-2 for Au/Si-NCs. Compared to those obtained from various surface-modified Si-nanostructures, such as ZnO/Si-nanopillars and ferroelectrics/Si-nanotips, the current results represent an interesting alternative route for producing surface-modified Si-NCs that might be useful for optical and electronic applications.

Original languageEnglish
Pages (from-to)10761-10766
Number of pages6
JournalPhysical Chemistry Chemical Physics
Volume15
Issue number26
DOIs
StatePublished - 14 Jul 2013

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