新型黄绿色荧光粉BaMoO_4:Pr^(3+)的制备与光致发光性质研究  

Preparation and Photoluminescent Properties of a Novel Yellow-Green BaMoO_4:Pr^(3+) Phosphor

作　　者：张伟杰[1] 冯文林[1,2] 程雪羚 熊博文[1] 吕立康 

机构地区：[1]重庆理工大学光电信息学院,重庆400054 [2]中国科学院国际材料物理中心,辽宁沈阳110016

出　　处：《光学学报》2014年第9期201-204,共4页Acta Optica Sinica

基　　金：国家自然科学基金(11104366);教育部重点科技项目(212139);重庆市科委自然科学基金(CSTC2011jjA50015)

摘　　要：采用高温固相法成功合成了新型BaMoO4:Pr3+黄绿色荧光材料,并对其晶体结构、形貌和发光性质进行了研究。X射线衍射(XRD)测试结果表明在1300℃制备的样品具有白钨矿类结构晶体,样品的形貌在扫描电镜(SEM)显示下呈不规则外形。荧光样品激发光谱由强的电荷迁移跃迁(CT)带和Pr3+离子的特征激发峰组成,主激发峰位于447nm(3 H4→3P2)、472nm(3 H4→3P1)和485nm(3 H4→3P0);其发射谱峰分别位于527nm(3P1→3 H4,5)、542nm和551nm(3P0→3 H5)、596nm(1 D2→3 H4)、614nm(3P0→3 H6)和642nm(3P0→3F2),最强发射峰位于642nm处。获得Pr3+的最佳掺杂摩尔分数为0.2%~0.3%。研究表明:BaMoO4:Pr3+是一种有望应用于蓝光发光二极管(LED)有效激发的黄绿色荧光粉材料。A novel yellow-green BaMoO4 ： Pr3＋ phosphor is successfully prepared via high-temperature solid-phase method, and its structure, morphology and luminescence properties are studied. The X-ray diffraction （XRD） patterns results show that the samples obtained after sintered at 1300 ℃have the scheelite structure. The morphology of the sample has irregular shapes which can be observed by scanning electronic microscopy （SEM）. The excitation spectrum of phosphor sample consists of strong charge transfer （CT） band and characteristic excitation peaks of Pr3＋. The main excitation peaks are at 447 nm （3H4→3P2 ）, 472 nm（3H4→3P1 ） and 485 nm（3H4→3P0 ）, respectively. The emission spectrum peaks locate at 527 nm（3p1→3H4.5）, 542 nm and 551 nm （3P0→3H5）, 596 nm （1D2→3H4）, 614 nm（3P0→3H6） and 642 nm（3P0→3F2）, respectively. The strongest peak appears at 642 nm. The optimum doping mole fraction of Pr3＋ is 0.2 % ~0.3 %. The results show that BaMoO4 ： Pr3＋ is a promising yellow- green phosphor which can be effectively excited by blue light emitting diode （LED）.

关 键 词：材料 高温固相法 光致发光 BAMOO4 Pr3+ 

分 类 号：O482.31[理学—固体物理]