Luminescence properties and energy transfer investigations of Ba2La2.85−xTb0.15Eux(SiO4)3F multicolor phosphor

• Published in: RSC advances 2018, Vol.8 (48), p.27332-27341
• Main Authors: Ma, Xiaoxue, Liao, Libing, Guo, Qingfeng, Liu, Haikun, Zhou, Tianshuai, Lefu Mei
• Format: Article
• Language: English
• Subjects: Apatite; Chemistry; Crystal structure; Energy transfer; Europium; Excitation; Light emitting diodes; Luminescence; Near ultraviolet radiation; Optical properties; Organic light emitting diodes; Phosphors; Photoluminescence; Quadrupole interaction; Quadrupoles; Scanning electron microscopy; White light; X-ray diffraction
• ISSN: 2046-2069
• DOI: 10.1039/c8ra04534h

The Ba2La2.85−xTb0.15Eux(SiO4)3F (BLSOF:0.15Tb3+, xEu3+) multicolor phosphors with apatite structure were synthesized via the solid-state pathway. The crystal structure and luminescence properties of the phosphors were investigated by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), Rietveld refinement, photoluminescence excitation (PLE) and photoluminescence (PL). The luminescence performance of the phosphor was optimum when the concentration of Tb3+ was set to be 0.15 mol and the concentration of Eu3+ was set to be 0.22 mol. Under the accurate excitation of 373 nm near ultraviolet (n-UV) light, the emitting color of the phosphors can be tuned from green to red with increasing Eu3+/Tb3+ ratio. It was further proved that the quadrupole–quadrupole (q–q) interaction is responsible for the energy transfer (ET) in the BLSOF:0.15Tb3+, 0.22Eu3+ phosphor. Owing to the excellent thermal quenching luminescence property, the BLSOF:0.15Tb3+, xEu3+ phosphor can be applied in n-UV white light emitting diodes (w-LEDs) and serve as the warm part of warm white light.