High-Luminance Green-Emitting Thin-Film Electroluminescent Devices Using ZnGa2O4:MnPhosphor

Autor: Minami, Tadatsugu, Maeno, Takanori, Kuroi, Yoshihiro, Shinzo Takata, Shinzo Takata
Zdroj: Japanese Journal of Applied Physics; June 1995, Vol. 34 Issue: 6 pL684-L684, 1p
Abstrakt: A high-luminance green-emitting electroluminescent (EL) device fabricated using a manganese-activated zinc gallate ( ZnGa2O4:Mn) thin-film phosphor in conjunction with a thick barium titanate ceramic insulator has been demonstrated. The green emission was observed in EL devices fabricated using as-deposited ZnGa2O4:Mn thin films prepared by rf magnetron sputtering. A higher luminance was attained for EL devices fabricated using ZnGa2O4:Mn thin films postannealed at 1020° C in an argon atmosphere. A luminance of 710 cd/m2and a maximum luminous efficiency of 1 lm/W were obtained for a ZnGa2O4:Mn thin-film EL device driven by a sinusoidal voltage at 1 kHz. The device when driven at 60 Hz exhibited a luminance of 230 cd/m2.
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