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• W4308981336 abstract "The development of phosphors with high quantum efficiency and excellent thermal stability remains a challenging task for phosphor-converted white light-emitting diodes (w-LEDs). In this work, trisilicate-structured BaLu 2 Si 3 O 10 : Dy 3+ /Eu 3+ (BLSO: Dy 3+ /Eu 3+ ) series phosphors with stable performance were synthesized by high-temperature solid-phase reaction method. The results show that the Dy 3+ monodoped trisilicate phosphor lacks a red component and exhibits cool white light properties, so Eu 3+ ions are introduced into the matrix to compensate for the lack of the orange-red emission region. A detailed investigation of the photoluminescence properties of the double-doped phosphor light shows that Eu 3+ ions can be well sensitized by Dy 3+ under near-UV excitation at 350 nm. According to the Dexter’s energy transfer equation and the Inokuti-Hirayama model, the energy transfer mechanism from Dy 3+ to Eu 3+ ions was confirmed as the electric dipole-quadrupole interaction, and the C DA value of the interaction parameter for the sample with Eu 3+ = 0.1 confirmed was 3.128×10 -54 cm 6 s -1 , and the energy transmission efficiency could reach 70.09%. By controlling the wavelength of the excitation light and the Eu 3+ ion concentration, the CIE coordinates of BLSO can be color adjusted in the white-yellow-orange-red region. The composition-optimized BLSO: Dy 3+ , Eu 3+ phosphor has a CCT of 5622 K. The luminescence intensity of BLSO: 0.04Dy 3+ , 0.1Eu 3+ at 423 K can be maintained at 81.15% of the luminescence intensity at 303 K, which is a satisfactory shows thermal fluorescence stability. From the obtained results, the prepared BLSO: Dy 3+ /Eu 3+ phosphor can be proven as a potential color-tunable luminescent material for w-LEDs. • BaLu 2 Si 3 O 10 : Dy 3+ , Eu 3+ phosphors with weak thermal quenching were synthesized via the conventional solid-state reaction method. • The energy transfer mechanismwas determined by Inokuti-Hirayama model and the ET microparameter C DA = 3.128×10 -54 cm 6 s -1 . • The CIE color coordinates of the BLSO: 0.04Dy 3+ , 0.3Eu 3+ sample was (0.330, 0.320) and the color temperature ~5622.8 K. • The emission intensity of the BLSO: 0.04Dy 3+ , 0.1Eu 3+ phosphor at 423 K could still maintain 81.15% of that at room temperature." @default.
• W4308981336 created "2022-11-20" @default.
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• W4308981336 date "2023-02-01" @default.
• W4308981336 modified "2023-09-25" @default.
• W4308981336 title "Tunable emission in Dy3+/Eu3+-doped BaLu2Si3O10 trisilicate structure for white light-emitting diode applications" @default.
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• W4308981336 doi "https://doi.org/10.1016/j.jallcom.2022.168068" @default.
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