A novel white emission in Ca₈MgBi(PO₄)₇:Dy³⁺ single-phase full-color phosphor

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• 作者：Z.W. Zhang^a ; ^b ; ^{zhangzhiweia@163.com" class="auth_mail} ; A.J. Song^b ; M.Z. Ma^a ; ^{mz550509@ysu.edu.cn" class="auth_mail} ; X.Y. Zhang^a ; Y. Yue^a ; R.P. Liu^a
• 关键词：Phosphors ; Single-phase white-light-emitting phosphors ; Ca8MgBi(PO4)7 ; xDy3+ ; White light-emitting diode
• 刊名：Journal of Alloys and Compounds
• 出版年：15 July, 2014
• 年：2014
• 卷：601
• 期：Complete
• 页码：231-233
• 全文大小：702 K

文摘

Novel single-phase white-light-emitting Ca₈MgBi(PO₄)₇:xDy³⁺ (x = 0.02, 0.04, 0.06, 0.08, 0.12, 0.20, and 0.30) phosphors for light-emitting diode (LED) applications were synthesized by conventional solid-state reactions, and the phases and luminescent properties were well characterized. The results show that the excited bands of the phosphor are centered at 324 nm (⁶H_15/2 鈫?#xA0;⁴M_17/2), 350 nm (⁶H_15/2 鈫?#xA0;⁴M_15/2, ⁶P_7/2), 366 nm (⁶H_15/2 鈫?#xA0;⁴I_11/2), 387 nm (⁶H_15/2 鈫?#xA0;⁴I_13/2, ⁴F_7/2), 427 nm (⁶H_15/2 鈫?#xA0;⁴G_11/2), and 448 nm (⁶H_15/2 鈫?#xA0;⁴I_15/2) wavelengths. On excitation at 350 nm, the emission transitions of Dy³⁺ ions consisted of double emission bands, which can be attributed to the ⁴F_9/2 鈫?#xA0;⁶H_15/2 (480 nm) and ⁴F_9/2 鈫?#xA0;⁶H_13/2 (572 nm) transition emissions. The phosphor developed in this study has great potential as a single-component white-light-emitting phosphor for UV-LEDs.