摘要
采用高温固相法,在常压氮气条件下,可控的制备出纯相的Sr2Si5N8:Eu2+氮化物红粉。进一步通过EuB6、SiB6、SiB4等不同硼源形式引入硼离子,研究了部分B3-替代N3-对Sr2Si5N8:Eu2+晶体结构和发光性能的影响。结果表明:当以EuB6+EuN的形式引入硼离子时,25℃下Sr2Si5N8-xBx:Eu2+(x=0.3)的发光强度比Sr2Si5N8:Eu2+提高了5.21%;150℃下,相比不含硼的荧光粉发光强度增强了3.10%,荧光粉的热稳定性明显改善。热稳定性的改善归因于B比N具有更强的共价性能,使得Eu-B比Eu-N具有更强的键接强度,引入适量硼离子能够改善发光中心Eu2+周围的晶体场环境,提高晶体的刚性。
The Sr2Si5N8:Eu2+nitride red phosphor in purity-phase was fabricated by the high temperature solid-state reaction under the normal pressure nitridation synthesis condition.To optimize the performance of the phosphor,boron ion in different forms such as EuB6,SiB6 and SiB4 was introduced into it and the effect of partial B3-substituted N3-on the crystal structure and luminescence performance of Sr2Si5N8:Eu2+were studied.The results showed that boron doping in EuB6+EuN increased the luminescence intensity of Sr2Si5N8-xBx:Eu2+(x=0.3)by 5.21%at 25℃and by 3.10%at 150℃compared with Sr2Si5N8:Eu2+,and its thermal stability was obviously improved.The improvement of thermal stability is attributed to the fact that the covalent property of B is stronger than that of N,which makes the bond strength of Eu-B stronger than that of Eu-N.Meanwhile,the doping of an appropriate amount of B ions improves the field environment of crystal around the luminous center Eu2+and the rigidity of the crystal.
作者
胡大海
伟乐斯
马一智
李响
朝克夫
HU Da-hai;Weilesi;MA Yi-zhi;LI Xiang;Chaokefu(College of Physics and Electronic Information,Inner Mongolia Normal University,Hohhot 010022,China;Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials,Hohhot 010022,China)
出处
《内蒙古师范大学学报（自然科学汉文版）》
CAS
2020年第4期348-352,共5页
Journal of Inner Mongolia Normal University(Natural Science Edition)
基金
内蒙古自然科学基金资助项目(2019MS05030)
内蒙古科技计划资助项目(2019GG263)。
