Luminescence properties and energy transfer investigations of Ba2La2.85−xTb0.15Eux(SiO4)3F multicolor phosphor. Issue 48 (31st July 2018)

• Record Type: Journal Article
• Authors: Ma, Xiaoxue; Liao, Libing; Guo, Qingfeng; Liu, Haikun; Zhou, Tianshuai; Mei, Lefu
• Is Part Of: RSC advances. Volume 8:Issue 48(2018)
• Page Start: 27332
• Page End: 27341
• Publication Date: 2018-07-31
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra04534h
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The developed phosphors can be accurately excited by 373 nm (n-UV) light and produce a gradient of colors. Abstract : The Ba2 La2.85− x Tb0.15 Eu x (SiO4 )3 F (BLSOF:0.15Tb 3+, x Eu 3+ ) 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 Tb 3+ was set to be 0.15 mol and the concentration of Eu 3+ 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 Eu 3+ /Tb 3+ ratio. It was further proved that the quadrupole–quadrupole (q–q) interaction is responsible for the energy transfer (ET) in the BLSOF:0.15Tb 3+, 0.22Eu 3+ phosphor. Owing to the excellent thermal quenching luminescence property, the BLSOF:0.15Tb 3+, x Eu 3+ phosphor can be applied in n-UV white light emitting diodes (w-LEDs) and serve as the warm part of warm white light.