Tb-doped MgAlO phosphors: A study of structural and luminescence characteristics.

In the MgO-AlO system, magnesium aluminate spinel (MgAlO) is a technologically significant compound due to its unique properties, including a high melting point, low thermal conductivity, excellent thermal shock resistance, chemical inertness, and robust mechanical strength. This compound has diverse applications in refractory materials, catalyst supports, moisture sensors, nuclear techniques, insulating materials, and even military applications. While rare-earth elements are commonly used as dopants in luminescent materials, limited research exists on doping of Tb ions in magnesium aluminate.

Anomalous dose behaviour of thermoluminescence glow curves and kinetic analysis of beta irradiated YAl(BO):Tb phosphor.

With the aid of thermoluminescence (TL), we have extensively studied YAl(BO) host matrices incorporated with Tb at different doping contents, which have been produced by combustion. The measured the TL glow curves exposed to beta rays at different doses consisted of four broad peaks located at around 76, 126, 230, and 378 °C. The peak maximum of the 230 °C TL peak shifts toward higher temperatures after 5 Gy beta irradiation while the other peak maxima almost remain constant.

Cathodoluminescence properties of LaMoO:Ln (Ln: Eu, Dy, and Sm) phosphors.

LaMoO orange-red phosphors with high efficiency incorporated with Eu, Dy and Sm have been synthesized through a gel combustion method. The influences of rare earth doping in synthesized samples were analysed by X-ray diffraction (XRD), scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), and cathodoluminescence. Rare earth doped LaMoO samples show strong emission bands in the range of 400-750 nm and optimal doping concentration for all samples was 2 mol%.

Thermoluminescence spectra of Tm doped ZnBO phosphor prepared via a wet-chemical synthesis.

In this paper we describe the thermoluminescence (TL) characteristics of 0.8 mol% Tm doped ZnBOphosphors prepared by a wet-chemical method. The TL glow curves of the phosphor sample consisted of three peaks located at 181 °C, 213 °C and 351 °C.