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Highly efficient field emission from aligned ZnO/TiN core‐shell nanorods
Author(s) -
Ma Li An,
Lai Wen Zong,
Wei Zhao Hui,
Chen Yan Bin,
Chen Hong Xiang
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17186
Subject(s) - nanorod , materials science , tin , field electron emission , heterojunction , substrate (aquarium) , common emitter , work function , sputtering , optoelectronics , core (optical fiber) , hydrothermal circulation , carbon fibers , nanotechnology , thin film , composite material , metallurgy , chemical engineering , layer (electronics) , composite number , physics , quantum mechanics , electron , oceanography , geology , engineering
Abstract Novel polycrystalline TiN coated ZnO core‐shell heterostructure nanorods have been prepared on carbon paper substrate via a low‐temperature hydrothermal and sputtering process. The core‐shell emitters exhibit a highly efficient field‐emission performance with a low threshold of electric field ∼0.72 V/μm, and a high emission current density ~16.41 mA/cm 2 , a level that is the highest of ZnO emitters reported to date. The improved field‐emission characteristics may be attributed to the unique materials combination of ZnO core and TiN shell, resulting in the conductivity enhancement, emission sites increase, and the work function reduction. Our results demonstrate that ZnO/TiN core‐shell emitter will be a distinguished candidate for electronic source devices.