抄録
Porous anodic Al2O3 films 50μm in thickness formed in oxalic acid solution were detached cathodically from aluminum substrate. The films were then dipped in an aqueous solution of 2.92 wt. % Tb (NO3)3, and heat-teated at 550°C for 10 minutes in air. The light-emitting device was fabricated by sandwiching the Al2O3 film between sheets of 110 glass. At voltage of 280V AC 50Hz or above, a bright green light emission was obseorved, with peaks at 489, 542, 583, 620nm.
This emission is not intrinsic electroluminescence but is due to the air-plasma collision excitation of the Al2O3: Tb3+ phosphor that is formed on the pore walls of the film by the heat-treatment.
