Optical, thermal, and structural properties of Er3+ incorporated double perovskite Ca2MgWO6 phosphors.

Novel Ca 2 MgWO 6 phosphors doped with xEr3+ (x = 0.5, 1, 2, 3, and 4 mol%) were synthesized using the solid-state reaction method. Using XRD and FTIR analyses, successful product formation was confirmed. Subsequently, the phosphor was optimized by focusing on the characteristic emission peak at 529 nm, arising from the transition 2H 11/2 → 4I 15/2. The optimal concentration of Er³⁺ for the given host system was determined to be 2 mol%. Meticulous analyses revealed that the optimized phosphor possessed a direct optical band gap of 3.68 eV and the bonding parameter confirmed that the nature of bonding was ionic nature between the dopant and the host. Furthermore, phosphor also demonstrated high thermal stability up to 500 °C, excellent thermal quenching temperature of 357.43 K, and anomalous temperature-dependent emission properties. All these incredible features make the prepared phosphor a promising candidate for multifield applications like light generation, temperature sensing, etc. [Display omitted] • Er3+ doped Ca 2 MgWO 6 phosphors has been successfully synthesized through solid-state reaction method. • XRD and FTIR revealed that the structural properties were of the phosphor was not affetcted by the doping. • Prepared phosphor exhibited greenish emission and an abnormal TDPL spectra and great thermal stability. • The phosphor's unique features make it ideal for light emission, WLED, and thermal sensing applications. [ABSTRACT FROM AUTHOR]