(EN) A photocathode includes a substrate, a photoelectric conversion layer that is formed on the substrate and generates photoelectrons in response to the incidence of light, and an underlayer that is provided between the substrate and the photoelectric conversion layer and contains beryllium, wherein the underlayer has a first underlayer that contains a nitride of beryllium.
(ZH) 一种光电阴极,包括:基板;光电转换层,其设置在所述基板上,与光的入射相应地产生光电子;和基底层,其设置在所述基板与所述光电转换层之间,且包含铍,所述基底层具有包含铍的氮化物的第1基底层。