Abstract
Luminance of powder electroluminescent cells varies greatly with ambient temperature. This luminance instability can be improved by designing temperature-dependent impedance of an insulating layer. Attempts were made by using modified BaTiO3 ceramic powders as insulating materials. Luminance change has been suppressed below 8% at 20-70°C by a modified BaTiO3 powder having a negative temperature coefficient of the dielectric constant. Luminance at low temperatures down to - 40°C has also been improved.
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