Jump to main content
Jump to site search

Issue 27, 2018
Previous Article Next Article

Enhancement of field electron emission in topological insulator Bi2Se3 by Ni doping

Author affiliations

Abstract

Nanostructures of bismuth selenide (Bi2Se3), a 3D topological insulator material, and nickel (Ni) doped Bi2Se3 samples were prepared by a hydrothermal method to explore the field emission properties. An enrichment in the field electron emission (FE) properties in terms of the threshold and turn-on field values of Bi2Se3 and Ni doped Bi2Se3 nanostructures was measured at a base pressure of ∼1 × 10−8 mbar. Using the background of the Fowler–Nordheim (FN) theory a field enhancement factor (β) of 5.7 × 103 and a threshold field value of 2.5 V μm−1 for 7.5% Ni doped Bi2Se3 were determined by investigating the JE plot of the FE data. The value of β is three times higher than that of pure Bi2Se3 confirming the superior FE properties. The emission current was found to be very stable with the property of long standing durability as a negligible amount of variation was observed when measured at a constant value of 5 mA for 3 hours. The experimental results signify many opportunities for potential applications of Ni doped Bi2Se3 as a source of electrons in scanning as well as transmission electron microscopy, flat panel displays and as an X-ray generator, etc.

Graphical abstract: Enhancement of field electron emission in topological insulator Bi2Se3 by Ni doping

Back to tab navigation

Publication details

The article was received on 27 Mar 2018, accepted on 08 Jun 2018 and first published on 08 Jun 2018


Article type: Paper
DOI: 10.1039/C8CP01982G
Citation: Phys. Chem. Chem. Phys., 2018,20, 18429-18435
  •   Request permissions

    Enhancement of field electron emission in topological insulator Bi2Se3 by Ni doping

    K. Mazumder, A. Sharma, Y. Kumar, P. Bankar, M. A. More, R. Devan and P. M. Shirage, Phys. Chem. Chem. Phys., 2018, 20, 18429
    DOI: 10.1039/C8CP01982G

Search articles by author

Spotlight

Advertisements