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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Low-voltage cathodoluminescence properties of green-emitting ZnAl_2O_4:Mn~(2+) nanophosphors for field emission display
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Low-voltage cathodoluminescence properties of green-emitting ZnAl_2O_4:Mn~(2+) nanophosphors for field emission display

机译：用于场发射显示的绿色发射ZnAl_2O_4：Mn〜（2+）纳米磷光体的低压阴极发光特性

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摘要

A low-cost ZnAl_2O_4:Mn~(2+) 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 NH_3 gas. The effects of the preparation process and the Mn~(2+) concentration on optical properties of ZnAl_2O_4:Mn~(2+) were investigated. The phase composition, particle morphology, photoluminescence (PL) spectra of the ZnAl_2O_4:Mn~(2+) phosphor as well as low-voltage field emission properties of the FED device prepared by using the synthesized ZnAl_2O_4:Mn~(2+) phosphor were examined. Similar to ZnGa_2O_4:Mn~(2+), Mn~(2+)-doped ZnAl_2O_4 showed two green emission bands centered at 508 and 517 nm, respectively, which originate from ~4T_1 (~4G)->~6A_1 (~6S) transitions of Mn~(2+) on T_d and O_h sites. The PL intensity reached the maximum at 0.5 at.% Mn~(2+). Under the low-voltage excitation, the FED device exhibited bright green emission, high voltage brightness saturation, and high color purity.
机译：通过共沉淀法和两步焙烧成功地合成了一种低成本的场致发射显示用ZnAl_2O_4：Mn〜（2+）绿色纳米荧光粉，该工艺分两步进行，首先在空气中于1200°C煅烧2 h，然后在200℃退火。在流动的NH_3气体中900°C加热3小时。研究了制备工艺和Mn〜（2+）浓度对ZnAl_2O_4：Mn〜（2+）光学性能的影响。 ZnAl_2O_4：Mn〜（2+）荧光粉的相组成，颗粒形貌，光致发光（PL）光谱以及FED器件的低压场发射特性被检查了。类似于ZnGa_2O_4：Mn〜（2+），掺杂Mn〜（2+）的ZnAl_2O_4分别显示两个中心在508和517 nm处的绿色发射带，它们分别来自〜4T_1（〜4G）->〜6A_1（〜6S ）在T_d和O_h上Mn〜（2+）的跃迁。 PL强度在Mn〜（2+）为0.5原子％时达到最大值。在低电压激励下，FED器件呈现出亮绿色发射，高电压亮度饱和和高色纯度。

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