Color-tunable luminescence performance of single-component Na5Y(MoO4)4:Dy3+, Tm3+ white-emitting phosphor for white light-emitting diodes. Issue 16 (15th August 2022)

• Record Type: Journal Article
• Authors: Wang, Xiaomeng; Zhao, Zhou; Deng, Miao; Yang, Zhenrui; Wu, Qiqi; Zhang, Wentao
• Is Part Of: Ceramics international. Volume 48:Issue 16(2022)
• Page Start: 22869
• Page End: 22876
• Publication Date: 2022-08-15
• Subjects: Molybdate -- Dy3+/Tm3+ codoping -- Photoluminescence -- White emission -- Color tunable; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.04.211
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The single-component Na5 Y(MoO4 )4 :Dy 3+, Tm 3+ white-emitting phosphor was prepared by the sol-combustion method, and Tm 3+ was codoped for color-tunable white emission. The XRD patterns confirm that the as-prepared samples have a Na5 Y(MoO4 )4 structure and do not change with Dy 3+ /Tm 3+ codoping. Under ultraviolet excitation at 352 nm, the Na5 Y(MoO4 )4 :Dy 3+ phosphor shows a characteristic white emission consisting of a weak peak at 485 nm and a strong peak at 577 nm. By codoping a small amount of Tm 3+, the blue emission of phosphor is enhanced, and the chromaticity coordinates can be adjusted between (0.3663, 0.416) and (0.319, 0.3407); thus, color-tunable white emission is achieved with the synergistic effect of Dy 3+ and Tm 3+ . The luminescence intensity of Na5 Y(MoO4 )4 :Dy 3+, Tm 3+ at 483 K still retains 72% of the initial intensity, showing excellent thermal stability. By combining Na5 Y(MoO4 )4 :Dy 3+, Tm 3+ with a 365 nm chip, the fabricated w -LED device emits bright white light for illumination. Therefore, the as-prepared Na5 Y(MoO4 )4 :Dy 3+, Tm 3+ has potential applications in the field of w -LEDs as white-emitting phosphors.