The structure model of multialkali photocathode of P-type Na2Ksb+ intrinsic K2CsSb+ intrinsic Cs3 Sb has been proposed.

• 对多碱光电阴极P型Na_2KSb+本征K_2Cssb+本征Cs_3Sb的结构模型进行了印证; 提出了工艺上应采取的措施。