Accession Number : ADD009309
Title : Thin Film Electroluminescent Device.
Descriptive Note : Patent Application,
Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC
Personal Author(s) : Murphy,Joseph
Report Date : 28 Jan 1982
Pagination or Media Count : 10
Abstract : This invention relates to the structure of a thin film electroluminescent device wherein an insulating layer (Y2O3) is disposed between a pair of outer active layers of doped semiconductor (ZnS:Mn). Contiguous to one outer layer of ZnS:Mn is a metal electrode while a transparent electrode is contiguous to the other outer ZnS:Mn layer. The composite structure, moreover, is formed on and supported by a glass substrate. Electroluminescent phenomenon occurs primarily at the layer interfaces upon the application of an alternating voltage applied across electrodes. Such a structure is more resistant to failure due to the fact that the ZnS:Mn layers next to the electrodes act as current limiting layers for preventing breakdown and destruction of the metal electrode for a certain applied voltage which would otherwise occur in electroluminescent structures having the active ZnS:Mn layer sandwiched between two insulating layers.
Descriptors : *Patent applications, *Electroluminescence, *Thin films, *Composite materials, *Layers, Metals, Electrodes, Insulation, Substrates, Failure, Resistance, Inventions
Subject Categories : Electricity and Magnetism
Distribution Statement : APPROVED FOR PUBLIC RELEASE