Realizing enhanced down-conversion photoluminescence and Judd-Ofelt parameters of novel reddish-orange emitting KBaScSi3O9:xSm3+silicate phosphors

A new series of reddish-orange emitting KBaScSi3O9:Sm3+ phosphors prepared by a solid-state reaction method. The X-ray diffraction study confirmed the single phase of monoclinic structure. The omega 2, omega 4 and omega 6 parameters were estimated for silicate phosphors, from the absorption spectra using Judd-Ofelt theory. Photo-luminescence spectra exhibit four emission bands under the excitation at 403 nm. The radiative parameters were predicted from luminescence spectra for the prepared phosphors to check their applicability in lasing and photonic applications. However, the KBSS:0.06Sm phosphor shows higher luminescence intensity when compared to other studied phosphors and the same can be used as a potential candidate for devices emitting in the reddish-orange zone. The decay spectra traced for silicate phosphors have been used to calculate the experimental lifetimes and inter-related further with radiative lifetimes to determine the luminescence quantum efficiency.

Automated summary

A new reddish-orange emitting KBaScSi3O9:Sm3+ phosphor was successfully prepared and characterized in this study. Among all the studied phosphors, KBSS:0.06Sm phosphor exhibited higher luminescence intensity, making it a potential candidate for reddish-orange emitting devices.