A novel Eu³⁺/Eu²⁺ co-doped MgSrLa₈(SiO₄)₆O₂ single-phase white light phosphor for white LEDs

Abstract

Under ultraviolet light excitation, the phosphor shows simultaneously the blue emission of the Eu2+ and the green-yellow-red emission of the Eu3+.

Effect of Tb3+ concentration on the structure and optical properties of triply doped ZnAl2O4:1% Ce3+,1% Eu3+,x% Tb3+ nano-phosphors synthesized via citrate sol-gel method

“…10 (b). These emission peaks were attributed to arise from the 5 D0 → 7 F0, 5 D0 → 7 F1, 5 D0 → 7 F2 and 5 D0 → 7 F4 electronic transitions of Eu 3+ ion, respectively [35][36][37]. The Tb 3+ singly doped sample showed four emission peaks around 490, 545, 588 and 624 nm, which were attributed to the 5 D4 → 7 F6, 5 D4 → 7 F5, 5 D4 → 7 F4 and 5 D4 → 7 F3 electronic transitions from Tb 3+ ion [9], respectively.…”

Constructing Concentration and Temperature Controllable Blue-Green Emission in a Single-Component Solid-State Phosphor

“…In an ion-pair color controlling system, the dopant ion concentration was commonly selected as the independent variable to describe emission colors, for instance, blue-green emission by Ce 3+ /Tb 3+ , 19 blue-yellow emission by Eu 2+ / Mn 2+ , 18 and blue-red emission by Eu 2+ /Eu 3+ . 25 The results of the emissions present as linear dot distribution on the CIE map under most circumstances. Recently, emission color adjustment by luminescent host and dopant ions 6 was also reported as a method to achieve white colors, in which Gupta et al 26 obtained a white color emission in the La 2 Hf 2 O 7 :Eu 3+ system via U 6+ codoping.…”

“…Even though various color adjustment systems have shown their success by using different ion pairs − or temperature control, − the study of the emission influence by both additive concentration and temperature remains insufficient. In an ion-pair color controlling system, the dopant ion concentration was commonly selected as the independent variable to describe emission colors, for instance, blue-green emission by Ce 3+ /Tb 3+ , blue-yellow emission by Eu 2+ /Mn 2+ , and blue-red emission by Eu 2+ /Eu 3+ . The results of the emissions present as linear dot distribution on the CIE map under most circumstances.…”