PHOTOCATHODE Russian patent published in 1995 - IPC

FIELD: photoemission converters. SUBSTANCE: photocathode is based on compounds A³B⁵ and includes isovalent and acceptor impurities and activating coat on base of cesium and oxygen. Active layer contains element of third or fifth group with covalent radius greater and electric negativity smaller of than proper characteristics of material of base of active layer in the capacity of isovalent impurity. In the capacity of acceptor impurity active layer has element with covalent radius and electric negativity smaller than corresponding characteristics of element of third or fifth group of mentioned above isovalent impurity. EFFECT: improved operational stability. 1 dwg