Abstract
Single-cubic-phase garnet phosphors of the trivalent samarium (Sm3+)-doped Li6CaLa2Sb2O12 and Li6SrLa2Sb2O12 matrices were investigated with respect to their crystal structure, morphology, and photoluminescence properties. The concentration quenching mechanism dominated by the dipole-dipole interaction determined the 5 mol% Sm3+ as the optimal doping concentration for the Li6ALa2Sb2O12:Sm3+ (A = Ca and Sr) garnet phosphors. As such, the performance comparison was carried out between Li6CaLa2Sb2O12:0.05Sm3+ and Li6SrLa2Sb2O12:0.05Sm3+ garnet phosphors in terms of various aspects (e.g., photoluminescence emission intensity, color purity, thermal stability, photoluminescence quantum yield, and decay curve). Particularly, the emission intensity of the Li6SrLa2Sb2O12:0.05Sm3+ was stronger than the Li6CaLa2Sb2O12:0.05Sm3+ phosphor. Interestingly, both Li6SrLa2Sb2O12:0.05Sm3+ and Li6CaLa2Sb2O12:0.05Sm3+ garnet phosphors exhibited beneficial thermal stability of 67.72 % and 61.67 % at 423 K, respectively. Overall, it is the first report to study and compare the photoluminescence performances of the reddish-orange Li6ALa2Sb2O12:Sm3+ (A = Ca and Sr) garnet phosphors. The findings of this work aim to design a thermal-stable garnet phosphor for potential solid-state lighting.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
