Unveiling the radiant secrets: Delving into luminescent behaviors of rare earth-infused strontium cerate

The sensitization approach enhances the activator emission when excitation energy is insufficient. Strontium cerate doped with rare earth elements can tune the emission properties by complementing the host’s inherent blue emission, although luminescence studies remain nascent. This study introduces Samarium and Dysprosium, having well-documented radiative transitions, as dopants into SrCeO₃ at optimized concentrations, with Bismuth ion (Bi³⁺) and Lithium ion (Li⁺) co-doping to preserve structural integrity. Sensitizers, Bi³⁺, and Li⁺ can transfer emission energy to the activator in a doped host matrix. XRD analysis showed that all phosphors exhibit orthorhombic crystal structure with space group Pnma. FE-SEM analysis showed that SrCe_0.97Sm_0.02O₃:1 wt% Bi³⁺ exhibits larger average grain size 0.89 μm. The white photoluminescence upon co-doping with Bi³⁺/Li⁺ ascribed to energy transfer mechanism, with Bi³⁺ recognized as the optimal sensitizer. The CIE chromaticity diagram shows SrCe_0.97Sm_0.02O₃:1 wt% Bi³⁺ phosphor displays excellent CRI, making it a strong candidate for wLED applications.