Diamond p-n Junction Cold Cathode

摘要

This effort successfully demonstrated that intercalated graphite fibers areoutstanding cathode materials. Such fibers are stable in air at ambient temperature and offer current densities of over 100 Amps/sq cm at 10 volts bias voltage (at 700 K). Ambient temperature cathodes also offer high current capability at somewhat higher bias voltage. Cesiated graphite and diamond both exhibit these characteristics, but graphite intercalation compounds are stable in air whereas the diamond/cesium system is not. The graphite cathodes do not require a cesium reservoir in order to function.... Cold cathode, Negative electron affinity.