Introduction of Molybdenum into the lattice of single-host CaZrO3: Dy3+/Eu3+ to enhance luminescence intensity of the phosphor for white light emission

Abstract

In the present study, we successfully prepared single-host CaZrO3 codoped Dy3+/Eu3+/Mo6+ for white light emission by employing solid state reaction method. Molybdenum was introduced into the lattice to enhance luminescence intensity of the phosphor materials. The luminescence properties of all the prepared samples were investigated under UV-lamp. The XRD results confirmed the formation of orthorhombic phase CaZrO3. The SEM photographs realized that the prepared phosphor materials have a tendency to form agglomerates. Similarly, the EDS test was carried out to confirm the absence of any extraneous impurities. Mo6+ was incorporated into Dy3+ and Eu3+ singly doped, and also in Dy3+/Eu3+ codoped CaZrO3. Furthermore, we also studied the energy transfer between Mo6+ → Dy3+ and Mo6+ → Eu3+ in detail. The increasing dopant concentration of Mo6+ (Mo = 0.1, 0.5, 0.8, 1.0, 2.0) mol% under 350 nm excitation source, the CIE color coordinates shift towards the vicinity of white light, which makes this material prominent for the fabrication of white light emitting diodes (WLEDs).