{Y{sub}2O{sub}3){sub}(1-x) - (GeO{sub}2){sub}x}: Mn multicomponent oxides thin film electroluminescent device

摘要

The PL and EL characteristics of new multicomponent oxide {(Y{sub}2O{sub}3){sub}(1-x)-(GeO{sub}2){sub}x}:Mn thin films prepared by r.f. magnetron sputtering were strongly dependent on the preparation condition of the thin films. It was found that the GeO{sub}2 content dependence of the maximum luminance obtained in {(Y{sub}2O{sub}3){sub}(1-x)-(GeO{sub}2){sub}x}:Mn thin-film electroluminescent (TFEL) devices was similar to that of PL intensity obtained from the thin-film emitting layer used. High luminances above 1000cd/m{sup}2 were obtained in TFEL devices using {(Y{sub}2O{sub}3){sub}(1-x)-(GeO{sub}2){sub}x}:Mn thin films prepared with a GeO{sub}2 content of 5 to 84 mol.%. Luminances of 7700 and 724cd/m{sup}2 were obtained in TFEL devices using {(Y{sub}2O{sub}3){sub}0.6-(GeO{sub}2){sub}0.4}:Mn thin films prepared with a GeO{sub}2 content of 40 mol.%, when driven at 1kHz and 60Hz, respectively.