A novel Eu3+/Eu(2+)co-doped MgSrLa8(SiO4)(6)O-2 single-phase white light phosphor for white LEDs

作者：Gao, Xiaoli; Liu, Haitao^*; Yang, Xinyu^*; Tian, Yiguang^*; Lu, Xue; Han, Liyuan

来源：RSC Advances, 2017, 7(3): 1711-1717.

DOI：10.1039/c6ra25792e

• TIME-RESOLVED LUMINESCENCE
• COLOR-TUNABLE PHOSPHOR
• ENERGY-TRANSFER
• EMITTING PHOSPHOR
• CRYSTAL-STRUCTURE
• EU3+
• MN2+
• EMISSION
• OXIDE
• EU2+

A novel MgSrLa8-x(SiO4)(6)O-2: xEu (MSLSO: xEu) phosphor was synthesized through a high-temperature solid-state reaction. The crystal structures, luminescent properties, fluorescence decay time, and oxygen vacancies were investigated systemically. XRD analysis shows a typical oxyapatite structure with the space group P6(3)/m. Europium can enter crystal matrices simultaneously in the form of Eu3+ and Eu2+ and occupy nonequivalent crystallographic positions in a lattice, thus forming various optical centers. Under ultraviolet light excitation, the phosphors simultaneously show the blue-green emission of Eu2+ and the green-yellow-red emission of Eu3+. The optimal doping content of Eu is 7.5 mol% (x = 0.075). White light can be realized with a CIE coordinate of (0.3664, 0.3260) by adjusting the concentration of Eu. The lifetimes of Eu3+ and Eu2+ in this study are considerably longer than those in other references. The results suggest that the MSLSO: Eu2+/Eu3+ (0.075) phosphor is a promising candidate for white LEDs.

• 出版日期2017
• 单位温州大学