论文信息 - Saturation effects of cathodoluminescence in rare‐earth activated epitaxial Y3Al5O12 layers

Saturation effects of cathodoluminescence in rare‐earth activated epitaxial Y3Al5O12 layers

The intensity of luminescence in YAG, activated with rare‐earth ions, shows a nonlinear behavior as a function of incident current density under electron bombardment. Tb3+ or Eu3+ activated samples exhibit deviation from linearity at input power densities exceeding 104 W/m2, while Ce3+ luminescence is linear up to the highest power densities studied (108 W/m2). It is shown that nonlinearity effects, in cases where temperature quenching can be excluded, are caused by saturation of the excited‐state population. The results are interpreted in a model which also takes into account excited‐state absorption within one activator and energy transfer between neighboring activator ions.

W. Weg | M. W. V. Tol

[1] J. M. Robertson,et al. Epitaxially grown monocrystalline garnet cathode‐ray tube phosphor screens , 1980 .

[2] M. Stevens,et al. Phosphors and Picture-Tube Performance , 1975, IEEE Transactions on Consumer Electronics.

[3] R. G. Delosh,et al. A Technique for Measuring the Saturation of Phosphors at High Current Densities , 1973 .

[4] R. S. Alwitt. Some Physical and Dielectric Properties of Hydrous Alumina Films , 1971 .

[5] V. Meyer,et al. Phosphor Screens for High‐Current‐Density Cathode‐Ray Tubes , 1969 .

[6] G. Blasse,et al. A NEW PHOSPHOR FOR FLYING‐SPOT CATHODE‐RAY TUBES FOR COLOR TELEVISION: YELLOW‐EMITTING Y3Al5O12–Ce3+ , 1967 .

[7] G. Wood,et al. Substructures in Oxide Scales on Nickel, Cobalt, and Nickel‐Cobalt Alloys , 1967 .

[8] M. Inokuti,et al. Influence of Energy Transfer by the Exchange Mechanism on Donor Luminescence , 1965 .

[9] L G Pittaway,et al. The temperature distributions in thin foil and semi-infinite targets bombarded by an electron beam , 1964 .

[10] A. Bril. On the saturation of fluorescence with cathode-ray excitation , 1949 .