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8460706 
Journal Article 
Near UV-pumped yellow-emitting Sr9MgLi(PO4)(7):Eu2+ phosphor for white-light LEDs 
Qiao, J; Xia, Z; Zhang, Z; Hu, B; Liu, Q; , 
2018 
SCIENCE PRESS 
BEIJING 
985-992 
WOS:000439326400009 
Laboratory discovery of new phosphors for white-light light-emitting diodes (WLEDs) is still an imperative challenge. A new yellow-emitting Sr9MgLi(PO4)(7):Eu2+ phosphor was discovered based on the mineral-inspired prototype evolution and new phase construction strategy proposed by our group. Sr9MgLi(PO4)(7):Eu2+ has been synthesized by using a high temperature solid-state method, and its phase structure and luminescence properties have been investigated in detail, and applied in WLED lamp. Sr9MgLi(PO4)(7) phase is derived from the beta-Ca-3(PO4)(2)-type mineral structure. Upon 365 nm UV light excitation, the Sr9MgLi(PO4)(7):Eu2+ phosphor exhibits a broad emission band from 450 nm to 700 nm. The white-light LED lamp was fabricated based on the phosphor blends of the composition-optimized yellow-emitting Sr9MgLi (PO4)(7):Eu2+ and commercial blue-emitting BaMgAl10O17:Eu2+, and a 365 nm UV chip was used as the excitation source. The R-a, CCT value and CIE of the as-fabricated LEDs were found to be 83, 5,612 K, and (0.324, 0.358), respectively. All the results indicate that Sr9MgLi(PO4)(7):Eu2+ could be potential in the development of UV-pumped white-light LEDs.