Mn-Activated CaO–Ga₂O₃ Phosphors for Thin-Film Electroluminescent Devices

Abstract

Multicomponent oxide phosphors such as Mn-activated CaO–Ga 2 O 3 are demonstrated to be very promising as the thin-film emitting layer for thin-film electroluminescent (TFEL) devices. The EL emission color from CaO–Ga 2 O 3 :Mn TFEL devices changed from green to orange as the CaO content was increased from 0 to 100 mol%. A Ga 2 O 3 :Mn TFEL device driven at 1 kHz produced a green emission with a luminance of 232 cd/m 2 . A yellow emission with a luminance of 1725 and 261 cd/m 2 was obtained in a TFEL device using a CaGa 2 O 4 :Mn thin film prepared with a CaO content of 50 mol%, when driven at 1 kHz and 60 Hz, respectively.