一种新型红色长余辉材料的制备及其发光性能  

Synthesis and photoluminescence of a new red long afterglow material

作　　者：杨柳[1] 曹立新[1] 苏革[1] 柳伟[1] 李京[1] 

机构地区：[1]中国海洋大学材料科学与工程研究院,山东青岛266100

出　　处：《功能材料》2010年第5期819-821,826,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50672089);2008年教育部新世纪优秀人才支持计划资助项目(NCET-08-0511)

摘　　要：采用高温固相法制备出Sr3Al2O6∶Eu3x+红色荧光材料,可被可见光激发。在392和463nm激发下的线状发射峰,可归属为Eu3+离子的5DJ(J=0,1,2,3)→7FJ(J=0,1,2,3,4,5)跃迁,以612和617nm附近对应于5D0→7F2的电偶极跃迁发光最强。随着Eu3+掺杂量的增加,612nm附近发射峰相对减弱,而617nm处的发射峰相对增强,当x值为0.16时,样品发光强度最大。将所制样品与蓝、紫色长余辉材料混合,在停止光照后,利用长余辉材料所发出的光作为激发光源,使样品能够继续发射红光,从而得到一种新型的红色长余辉材料。Red fluorescent material Sr3Al2O6：Eu3＋x which can be excited by visible light was synthesized by high temperature solid-state method. Upon excitation with 392 and 462nm light,the sample exhibited narrow emission peaks due to the 5DJ（J=0,1,2,3） to 7FJ（J=0,1,2,3,4,5） transitions of Eu3＋ ion. The main emission peak was constituted by two peaks at 612 and 617nm which were ascribed to the hypersensitive forced electric-dipole 5D0 to 7F2 transition. With the increase of Eu3＋ molar ratio,the emission peak at 612nm weakened relatively meanwhile the emission peak at 617nm strengthened relatively. When x value is 0.16,the photoluminescence intensity is highest. The red phosphor was mixed with the blue,violet long afterglow materials which were used as the excitation light source to constantly excite the sample,and enable it to continue to release red light,and thus a new type red long afterglow material was obtained.

关 键 词：高温固相法 Sr3Al2O6∶Eu3+ 可见光激发 红色长余辉 

分 类 号：O482.31[理学—固体物理]