Thin film electroluminescent element

Details Thin film electroluminescent element Thin film electroluminescent element

G - Physics

09

F

31/106, 345/5

G09F 9/00 (2006.01)

Patent

CA 1242021

ABSTRACT OF THE DISCLOSURE In a thin film electroluminescent element comprising a phosphor thin film, a dielectric thin film disposed on at least one of surfaces of the phosphor thin film and electrodes for applying a voltage across the thin films, the aforementioned dielectric thin film is formed of a dielectric material expressed by a general formula of AB2O6 (where A represents a divalent metal element and B represents a pentavalent metal element). By employing the dielectric material, the voltage for driving to thin film electroluminescent ele- ment can be lowered without decreasing brightness of the element. Further, by using a composite dielectric thin film in which the dielectric thin film expressed by the aforementioned general formula AB2O6 is laminated thereon with a dielectric thin film insusceptible to dielectric breakdown of self-healing type, the com- posite dielectric thin film is susceptible to the dielectric breakdown of self-healing type. Additionally, the value of product of the dielectric breakdown field intensity and dielectric constant is increased, to allow the thin film electroluminescent element having excellent characteristics to be realized.

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