NIR emission in Nd3+-doped Ca2KMg2V3O12phosphor for laser applications

Abstract

Luminescent properties were characterized and investigated in Ca2KMg2V3O[Formula: see text] phosphor. Near infrared (NIR) emission of Nd[Formula: see text] activator in Ca2KMg2V3O[Formula: see text] host is reported for the first time. NIR emissions around 1[Formula: see text][Formula: see text]m due to characteristic lanthanide transitions are observed. Excitation spectra reveal that the NIR emission is host-sensitized. The sample was prepared by solution combustion synthesis method. Ca2KMg2V3O[Formula: see text] is a self-activated phosphor belonging to cubic system having space group [Formula: see text] with z = 8, a = 12.5 Å. Strong host emission was observed in the blue–green region. It displays broadband emission with an intense band centered at 508[Formula: see text]nm that spans almost the whole visible light spectrum, from 400[Formula: see text]nm to 700[Formula: see text]nm due to the d–d transition of V[Formula: see text] ions in the (VO[Formula: see text] groups. The Ca2KMg2V3O[Formula: see text]:Nd[Formula: see text] phosphor showed NIR emission at 1072[Formula: see text]nm due to transition 4F[Formula: see text]I[Formula: see text], for 343[Formula: see text]nm excitation. Obtained results indicate the significant potential of Ca2KMg2V3O[Formula: see text] phosphor for solid state laser applications. The strong absorption resulting from f–f transitions in the 470–890[Formula: see text]nm range makes the phosphor appropriate for a number of applications, including solar-pumped lasers.