Cathodoluminescence and Photoluminescence of Tb+3 Activated LaAlO3

Abstract

Stable LaAlO3 has been prepared and activated by Tb+3. The compounds show a strong cathodoluminescence. When excited by the appropriate wavelengths in the u.v., they show a strong photoluminescence, at least equal to LaPO4:normalCe , Tb. The chromaticity coordinates, equivalent wavelengths, luminance, energetic yield, and the position of the phosphors in the chromaticity diagram have been determined. Strong 5D3‐7FJ emission was found at low Tb concentrations with CR excitation, while at higher Tb concentrations the green 5D4‐7F5 transition predominates.

La-Doped Alumina, Lanthanum Aluminate, Lanthanum Hexaaluminate, and Related Compounds: A Review Covering Synthesis, Structure, and Practical Importance

“…It is also a good host material for a variety of guest ions, and both the A and B sites can be doped with a wide choice of other metal ions. This opens the doors to an extended range of possible applications; i.e., as photo- and/or thermo-luminescent materials, − specifically after doping with RE ions. ,− In this way, LMA finds applications in dosimeters for UV and ionizing radiation, and for the color adjustment of light-emitting diodes (LEDs). LMA doped with Mn 4+ has attracted particular attention due to its intense emission in the red and near IR region .…”