A Single‐Phase High‐Color‐Rendering NaAlSiO₄:Pb²⁺/Tb³⁺/Eu³⁺ Phosphor for White Light‐Emitting Diodes

Abstract The development of single‐phase broadband white‐emitting phosphors has emerged as a critical research frontier for advanced solid‐state lighting technologies. Herein, the successful synthesis of NaAlSiO 4 :Pb 2+ /Tb 3+ /Eu 3+ phosphors is reported through high‐temperature solid‐state reactions, achieving tunable multicolor emission and full‐spectrum white light via rational energy transfer (ET) engineering. The strategic co‐doping scheme enables dual ET pathways—Pb 2+ →Tb 3+ (dipole–dipole) and Pb 2+ →Eu 3+ (dipole–dipole)—mediated by optimal energy level alignment. The optimized NaAlSiO 4 :0.01%Pb 2+ /0.01%Tb 3+ /0.005%Eu 3+ phosphor demonstrates white emission under 271 nm excitation, integrating blue (400 nm, Pb 2+ ), green (487/551 nm, Tb 3+ ), and red (592‐704 nm, Eu 3+ ) spectral components. Fabricated white LED devices exhibit superior photometric performance with a color rendering index (CRI) of 93.8 and correlated color temperature (CCT) of 4450 K, representing 30% CRI enhancement and 32% CCT reduction compared to commercial YAG:Ce 3 ⁺. This work demonstrates the great potential of NaAlSiO 4 :Pb 2+ /Tb 3+ /Eu 3+ phosphors for use in WLED applications and paves the way for designing high‐performance single‐matrix phosphors through controlled multi‐dopant energy transfer systems.