Control of point defects and space charge in electroluminescent ZnS:Mn thin films

The mechanisms leading to improved brightness, efficiency, and stability of alternating-current thin-film electroluminescent (ACTFEL) ZnS:Mn phosphors is studied. Electrical properties data are used to determine whether there is a reduced amount of static space charge in the codoped films, resulting in large average field, increased excitation efficiency, and increased charge multiplication.