Preparation and photoluminescence properties of Mn2+-activated M2Si5N8 (M = Ca, Sr, Ba) phosphors
Preparation and photoluminescence properties of Mn2+-activated M2Si5N8 (M = Ca, Sr, Ba) phosphors
复制标题
DOI：
10.1016/j.jssc.2007.12.031
复制
发表时间：
2008-04
影响因子：
3.3
通讯作者：
Cheng-Jun Duan;W. Otten;A. Delsing;Hubertus T. Hintzen
中科院分区：
文献类型：
--
作者：
Cheng-Jun Duan;W. Otten;A. Delsing;Hubertus T. Hintzen
采用高温固相反应法制备了掺锰{sup2+}Si{sub5}N{sub8}(M=Ca，Sr，Ba)发光材料，并对其发光性能进行了研究。由于Mn{sup 2+}的{sup 4}T{sub1}({sup 4}G){殖利}{sup 6}A{sub1}({sup 6}S)跃迁，使Mn{sup 2+}激活的M{sub2}Si{sub5}N{sub8}荧光粉在5 0 0~70 0 nm范围内显示出较窄的发射带，其峰值中心分别位于约5 99、6 0 6和5 6 7 nm。Mn{sup2+}离子在M{sub2}Si{sub5}N{sub8}基质中的长波发射归因于氮配位环境中Mn{sup2+}的强晶场效应。还观察到M{sub2}Si{sub5}N{sub8}主晶格与激活剂(Mn{sup2+})之间存在能量转移。指出了这些荧光粉的潜在应用。研究了M{sub2}Si{sub5}N{sub8}(M=Ca，Sr，Ba)中Mn{sup 2+}的发光性质。所有M{sub2}Si{sub5}N{sub8}：Mn{sup2+}荧光粉在500~700 nm的波长范围内表现出较窄的对称带，其中M=Ca，Sr，Ba的峰值中心分别约为599,606和567 nm。观察到的能带发射归因于M{sub2}Si{sub5}N{sub8}主晶格中的Mn{sup2+}的{sup4}T{sub1}({sup4}G){屈服}{sup6}A{sub1}({sup 6}S)跃迁。
Mn{sup 2+}-doped M{sub 2}Si{sub 5}N{sub 8} (M=Ca, Sr, Ba) phosphors have been prepared by a solid-state reaction method at high temperature and their photoluminescence properties were investigated. The Mn{sup 2+}-activated M{sub 2}Si{sub 5}N{sub 8} phosphors exhibit narrow emission bands in the wavelength range of 500-700 nm with peak center at about 599, 606 and 567 nm for M=Ca, Sr, Ba, respectively, due to the {sup 4}T{sub 1}({sup 4}G){yields}{sup 6}A{sub 1}({sup 6}S) transition of Mn{sup 2+}. The long-wavelength emission of Mn{sup 2+} ion in the host of M{sub 2}Si{sub 5}N{sub 8} is attributed to the effect of a strong crystal-field of Mn{sup 2+} in the nitrogen coordination environment. Also it is observed that there exists energy transfer between M{sub 2}Si{sub 5}N{sub 8} host lattice and activator (Mn{sup 2+}). The potential applications of these phosphors have been pointed out. - Graphical abstract: The luminescence properties of Mn{sup 2+} in M{sub 2}Si{sub 5}N{sub 8} (M=Ca, Sr, Ba) have been investigated. All M{sub 2}Si{sub 5}N{sub 8}:Mn{sup 2+} phosphors show narrow symmetric bands in the wavelength range of 500-700 nm with peak center at about 599, 606 and 567 nm for M=Ca, Sr, Ba, respectively. The observed band emission is ascribed to the {sup 4}T{sub 1}({sup 4}G){yields}{sup 6}A{sub 1}({sup 6}S) transition of Mn{sup 2+} in M{sub 2}Si{sub 5}N{sub 8} host lattice.