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Fowler–Nordheim Law Correlated with Improved Field Emission in Self‐Assembled NiCr 2 O 4 Nanosheets
Author(s) -
Karmakar Subrata,
Parey Vanshree,
Mistari Chetan D.,
Thapa Ranjit,
More Mahendra A.,
Behera Dhrubananda
Publication year - 2020
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201900741
Subject(s) - field electron emission , nanosheet , materials science , current density , work function , nanoelectronics , field (mathematics) , electric field , quantum dot , diode , nichrome , nanotechnology , optoelectronics , condensed matter physics , analytical chemistry (journal) , physics , electron , composite material , chemistry , quantum mechanics , pure mathematics , chromatography , mathematics , layer (electronics)
Electric field emission (FE) properties are measured on self‐assembled NiCr 2 O 4 nanosheets in a planner “diode” arrangement at a base pressure of ≈1.0 × 10 −8 mbar. The turn‐on field at FE current density 1 μA cm −2 and the threshold field at FE current density 10 μA cm −2 are observed as 4.10 and 4.94 V μm −1 , respectively. The local work function (Φ) is calculated as 4.358 eV, using density functional theory (DFT) in Quantum Espresso code and field enhancement factor ( β ) intensified up to 2074 from the sharp edges of the NiCr 2 O 4 nanosheet arrays’ emitter surface. An exemplary FE current stability is observed from the current–time plot over a period of 4.5 h. The field enhancement factor ( β ), inferior turn‐on field, and superior stability compared with any other pristine nanosheet compound recommend its potential application in flat panel display and vacuum micro‐/nanoelectronics.