Preparation and Long-Lasting Phosphorescence Properties of BaAlSi5N7O2:Eu2+
Preparation and Long-Lasting Phosphorescence Properties of BaAlSi5N7O2:Eu2+
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DOI：
10.1149/2.003306ssl
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发表时间：
2013
影响因子：
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通讯作者：
Haoran Zhang;Mingtao Zheng;B. Lei;Yong Xiao;Hanwu Dong;Ying-liang Liu;Xiaotang Liu;Jin-huan Deng
中科院分区：
文献类型：
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作者：
Haoran Zhang;Mingtao Zheng;B. Lei;Yong Xiao;Hanwu Dong;Ying-liang Liu;Xiaotang Liu;Jin-huan Deng
以Ba 2SiO 4：Eu 2+为前驱体，采用改进的固相反应法合成了BaAlSi 5 N7 O2：Eu 2+氮氧化物荧光粉。利用XRD表征发现该合成产物结晶良好。在300 nm激发下，BaAlSi 5 N7 O2：Eu 2+的发射峰在400 ~ 650 nm之间，主峰在515 nm附近。在254 nm紫外光照射下，在人眼暗适应光感极限（0.32 mcd/m2）内，至少40 min内可观察到Eu ~（2+）（4f 65 d → 4f 7）的余辉发射。
The oxynitride phosphor BaAlSi5N7O2:Eu2+ was synthesized by using a modified solid-state reaction method with Ba2SiO4:Eu2+ as the precursor. This synthesized product was found to be well-crystallized by utilizing XRD characterization. Under 300 nm excitation, BaAlSi5N7O2:Eu2+ shows an emission band extending from 400 to 650 nm with a main peak at about 515 nm. After irradiation under the 254 nm UV light, the afterglow emission of Eu2+ (4f65d → 4f7) can be obviously observed for at least 40 min in the limit of light perception of dark-adapted human eyes (0.32 mcd/m2).