Perovskites as ultra-low work function electron emission materials

Abstract

An electron emitter device is provided comprising a cathode comprising a conductive transition metal perovskite oxide comprising mobile conducting electrons exhibiting a conductivity of at least 10−6 Ω−1-cm−1 at room temperature, the transition metal perovskite oxide having a surface from which the mobile electrons are induced to emit upon receiving sufficient energy from an energy source; and an anode electrically coupled to the cathode and positioned to define an interelectrode conductive region between the anode and the cathode, onto which anode the emitted electrons are collected. The transition metal perovskite oxide may have formula Sr1-xBaxVO3. Related methods and devices based on the electron emitter device are also provided.

Dependencies are inferred from the claim text.