Oxide phosphor electroluminescent laminate

Details Oxide phosphor electroluminescent laminate Oxide phosphor electroluminescent laminate

C - Chemistry, Metallurgy

09

K

C09K 11/80 (2006.01) C09K 11/59 (2006.01) C09K 11/66 (2006.01) H05B 33/26 (2006.01)

Patent

CA 2299122

Electroluminescent laminates having a thin film electroluminescent oxide phosphor layer on insulating substrates. Thin film EL laminates are produced using high dielectric constant layers, such as SrTiO3 and BaTiO3 next to the oxide phosphor layer on one or both sides of the oxide layer, primarily as stable charge injection, and trapping interface layers, and to increase the electric field in the phosphor. Electric breakdown protection through self-healing has been provided by traditional low K dielectrics in combination with an appropriate choice of adjacent electrode. The high dielectric constant materials employed also provide for a high capacitance layer, thereby increasing the electric field in the phosphor and increasing the charge transfer into the phosphor during emission. These thin film EL laminates demonstrate steep brightness-voltage behavior and have been prepared using green and red electroluminescent oxide phosphors.

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