Stacked conductive metal–organic framework nanorods for high-performance vacuum electronic devices

Metal-organic frameworks (MOFs) possessing many unique features have been utilized in several fields recent years. However, their application field emission (FE) vacuum electronic device is hindered by poor electrical conductivity. Herein, a novel conductive MOF of Cu-catecholate (Cu-CAT) with the nanorod length 200 nm and conductivity 0.01 S/cm grown on graphite paper (GP). Under an applied electric field, large number electrons can be emitted from nanoscale emitter tips surface to anode. The great performance Cu-CAT@GP cold cathode film including low turn-on 0.59 V/μm ultra-high enhancement factor 29622, even comparable most carbon-based materials that widely investigated FE studies, achieved this work. Meanwhile, has good stability current attenuation 9.4% 2 h. findings reveal fabricated promising candidate electron source for applications. • A composed stacked Cu-CAT nanorods paper. Field first demonstrated film. FED presents pretty V/μm, state-of-the-art CNT-based materials.