Low-voltage cathodoluminescence properties of green-emitting ZnAl2O4:Mn2+ nanophosphors for field emission display
Low-voltage cathodoluminescence properties of green-emitting ZnAl2O4:Mn2+ nanophosphors for field emission display
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用于场致发射显示的绿光 ZnAl2O4:Mn2 纳米磷光体的低压阴极发光特性
DOI：
10.1016/j.jallcom.2011.03.076
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发表时间：
2011-05
影响因子：
6.2
通讯作者：
Sun, Zhuo
中科院分区：
文献类型：
--
作者：
Wang, Xiaojun;Zhang, Mingchang;Ding, Hui;Li, Huili;Sun, Zhuo
采用共沉淀法和两步烧结法，首先在空气中1200℃焙烧2小时，然后在流动的NH3气氛中900℃焙烧3小时，成功地合成了低成本的场发射显示器(FED)用锌铝氧化物：Mn2+绿色纳米荧光粉。研究了制备工艺和Mn2+浓度对ZnAl2O4：Mn2+光学性质的影响。对合成的ZnAl2O4：Mn2+荧光粉的物相组成、颗粒形貌、光致发光光谱以及用其制备的FED器件的低压场发射性能进行了测试。与ZnGa2O4：Mn2+类似，掺Mn2+的ZnAl2O4有两个绿色发射带，分别位于508和517 nm，它们来自于Mn2+在Td和OhSite上的4T1(4G)→6A1(6S)跃迁。当Mn2+浓度为0.5at.%时，发光强度达到最大值。在低电压激励下，FED器件表现出明亮的绿色发光、高电压亮度饱和度和高的颜色纯度。
A low-cost ZnAl2O4:Mn2+green nanophosphor for field emission display (FED) was successfully synthesized by the coprecipitation method and a two-step firing, firstly calcining at 1200 °C for 2 h in air and then annealing at 900 °C for 3 h in flowing NH3gas. The effects of the preparation process and the Mn2+concentration on optical properties of ZnAl2O4:Mn2+were investigated. The phase composition, particle morphology, photoluminescence (PL) spectra of the ZnAl2O4:Mn2+phosphor as well as low-voltage field emission properties of the FED device prepared by using the synthesized ZnAl2O4:Mn2+phosphor were examined. Similar to ZnGa2O4:Mn2+, Mn2+-doped ZnAl2O4showed two green emission bands centered at 508 and 517 nm, respectively, which originate from4T1(4G)→6A1(6S) transitions of Mn2+on Tdand Ohsites. The PL intensity reached the maximum at 0.5 at.% Mn2+. Under the low-voltage excitation, the FED device exhibited bright green emission, high voltage brightness saturation, and high color purity.
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