Ultra-pure orange-red emitting Eu3+ activated SrTi(PO4)2 phosphor for lighting and display devices

Phosphates are inorganic complex compositions which finds applications in the field of light emitting devices , charge storage devices etc, due to their high thermal stability, relatively low sintering temperature, strong optical absorption, flexible compositions and less hygroscopic nature[1,2]. Yavapaiite structured SrTi(PO₄)₂ belongs to the double monophosphate family having general formula AIIBIV(PO₄)₂ ( A= Cd, Ca and Sr; B= Zr, Sn, Mo and Ti) get extensively studied for their applications in dielectric materials, catalysts and ionic conductors [3,4]. Here we select Eu³⁺ as an activator ion to produce orange-red emission owing to its ⁵D₀→ ⁷FJ (0, 1, 2, 3 and 4) transitions. Eu³⁺ incorporated red phosphors are widely used in white LED, display devices, forensic applications etc.