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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/23003

Title: Engineering the interface characteristics on the enhancement of field electron emission properties of vertically aligned hexagonal boron nitride nanowalls
Authors: Kamatchi Jothiramalingam, Sankaran
Hoang, Duc-Quang
Srinivasu, K.
Korneychuk, S.
Turner, S.
Drijkoningen, Sien
Pobedinskas, Paulius
Verbeeck, J.
Leou, K. C.
Lin, I. N.
Haenen, Ken
Issue Date: 2016
Abstract: Utilization of Au and nanocrystalline diamond (NCD) as interlayers noticeably modifies the microstructure and field electron emission (FEE) properties of hexagonal boron nitride nanowalls (hBNNWs) grown on Si substrates. The FEE properties of hBNNWs on Au could be turned on at a low turn-on field of 14.3V mu m(-1), attaining FEE current density of 2.58mAcm(-2) and life-time stability of 105 min. Transmission electron microscopy reveals that the Au-interlayer nucleates the hBN directly, preventing the formation of amorphous boron nitride (aBN) in the interface, resulting in enhanced FEE properties. But Au forms as droplets on the Si substrate forming again aBN at the interface. Conversely, hBNNWs on NCD shows superior in life-time stability of 287 min although it possesses inferior FEE properties in terms of larger turn-on field and lower FEE current density as compared to that of hBNNWs-Au. The uniform and continuous NCD film on Si also circumvents the formation of aBN phases and allows hBN to grow directly on NCD. Incorporation of carbon in hBNNWs from the NCD-interlayer improves the conductivity of hBNNWs, which assists in transporting the electrons efficiently from NCD to hBNNWs that results in better field emission of electrons with high life-time stability.
Notes: Sankaran, KJ (reprint author), Hasselt Univ, Inst Mat Res IMO, B-3590 Diepenbeek, Belgium. sankaran.kamatchi@uhasselt.be; ken.haenen@uhasselt.be
URI: http://hdl.handle.net/1942/23003
DOI: 10.1002/pssa.201600233
ISI #: 000388321500017
ISSN: 1862-6300
Category: A1
Type: Journal Contribution
Validation: ecoom, 2017
Appears in Collections: Research publications

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