Ma'anar ƙamus na "photocathode" wani nau'in cathode ne wanda ke fitar da electrons lokacin da aka fallasa su ga haske. Yana da wani photosensitive surface cewa saki electrons ta photoelectric sakamako. Ana amfani da Photocathodes a aikace-aikace daban-daban kamar su intensifiers hoto, bututun daukar hoto, da microscopes na lantarki.
