Red-Emitting Manganese Doped MgAl2O4 Ceramic Spinels Studied by Time- and Temperature-Resolved Luminescence Spectroscopy

At present, searching for new efficient red light-emitting phosphors remains extremely relevant for obtaining warm white light from phosphor-converted white LEDs (pc-WLEDs). Appropriate phosphors should have significant absorption in the blue spectral range and emit in the red range of 620 ÷ 650 nm. Mn 4+ -doped luminescent materials with narrow-band emission due to the Mn 4+ d-d electronic transition have been subjected to intensive studies in the last years as promising red-emitting phosphors efficiently excited with blue LEDs.