Superior CoO/SiC nanowire field emitters with substantially increased stable emission sites: ultralow turn-on field, high current density and high stability

We explored high-performance field emitters with numerous CoO nanoparticles surrounding SiC nanowires for increasing emission sites, which exhibited ultralow turn-on field (0.40 V μm −1 ), high current density (18.6 mA cm −2 ) and high emission stability.