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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/22550

Title: Enhanced optoelectronic performances of vertically aligned hexagonal boron nitride nanowalls-nanocrystalline diamond heterostructures
Authors: Kamatchi Jothiramalingam, Sankaran
Hoang, Duc-Quang
Kunuku, Srinivasu
Korneychuk, Svetlana
Turner, Stuart
Pobedinskas, Paulius
Drijkoningen, Sien
Van Bael, Marlies K.
D'Haen, Jan
Verbeeck, Johan
Leou, Keh-Chyang
Lin, I-Nan
Haenen, Ken
Issue Date: 2016
Publisher: NATURE PUBLISHING GROUP
Citation: SCIENTIFIC REPORTS, 6 (ART N° 29444)
Abstract: Field electron emission (FEE) properties of vertically aligned hexagonal boron nitride nanowalls (hBNNWs) grown on Si have been markedly enhanced through the use of nitrogen doped nanocrystalline diamond (nNCD) films as an interlayer. The FEE properties of hBNNWs-nNCD heterostructures show a low turn-on field of 15.2 V/mu m, a high FEE current density of 1.48 mA/cm(2) and life-time up to a period of 248 min. These values are far superior to those for hBNNWs grown on Si substrates without the nNCD interlayer, which have a turn-on field of 46.6 V/mu m with 0.21 mA/cm(2) FEE current density and life-time of 27 min. Cross-sectional TEM investigation reveals that the utilization of the diamond interlayer circumvented the formation of amorphous boron nitride prior to the growth of hexagonal boron nitride. Moreover, incorporation of carbon in hBNNWs improves the conductivity of hBNNWs. Such a unique combination of materials results in efficient electron transport crossing nNCD-to-hBNNWs interface and inside the hBNNWs that results in enhanced field emission of electrons. The prospective application of these materials is manifested by plasma illumination measurements with lower threshold voltage (370 V) and longer life-time, authorizing the role of hBNNWs-nNCD heterostructures in the enhancement of electron emission.
Notes: [Sankaran, Kamatchi Jothiramalingam; Hoang, Duc Quang; Pobedinskas, Paulius; Drijkoningen, Sien; Van Bael, Marlies K.; D'Haen, Jan; Haenen, Ken] Hasselt Univ, Inst Mat Res IMO, B-3590 Diepenbeek, Belgium. [Sankaran, Kamatchi Jothiramalingam; Hoang, Duc Quang; Pobedinskas, Paulius; Drijkoningen, Sien; Van Bael, Marlies K.; D'Haen, Jan; Haenen, Ken] IMEC VZW, IMOMEC, B-3590 Diepenbeek, Belgium. [Kunuku, Srinivasu; Leou, Keh-Chyang] Natl Tsing Hua Univ, Dept Engn & Syst Sci, Hsinchu 30013, Taiwan. [Korneychuk, Svetlana; Turner, Stuart; Verbeeck, Johan] Univ Antwerp, Electron Microscopy Mat Sci EMAT, B-2020 Antwerp, Belgium. [Lin, I-Nan] Tamkang Univ, Dept Phys, Tamsui 251, Taiwan.
URI: http://hdl.handle.net/1942/22550
DOI: 10.1038/srep29444
ISI #: 000379391000001
ISSN: 2045-2322
Category: A1
Type: Journal Contribution
Validation: ecoom, 2017
Appears in Collections: Research publications

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