K4SrSi3O9:Eu3+Inorganic Phosphor – Synthesis, Structural, Photoluminescence, and JO Analysis

Abstract

A series of inorganic phosphor K₄SrSi₃O₉:Eu³⁺have been synthesized using modified solid state reaction method. The crystal structure and microstructural analysis has been studied using XRD patterns and comparing it with standard ICDD reference file. The phosphors shows emission in red/orange region with peak positions centered at 591 nm and 615 nm. The emission spectra were measure at 395 nm excitation wavelength. Further, the excitation spectrum measured at 615 nm emission wavelength shows multiple transitions with prominent transition at 395 nm. This suggests that the current phosphor have potential application in field of near UV-excited light emitting devices. The CIE analysis confirmed the emission region as well as CCT value at 1714 K. The study extended for Judd-Ofelt analysis and estimated intensity parameters and other relevant parameters. The results confirmed the less distortion nature of host matrices around Eu³⁺ ions as well as intensity parameter inferred that the current phosphor has laser applications.

Keywords: Silicate, Eu³⁺, Judd-Ofelt analysis, solid-state reaction method.