用于白光LED的Ca_2BO_3Cl:Eu^(2+)发光特性研究  

Luminescent properties of Ca_2BO_3Cl:Eu^(2+) phosphor for white LED

作　　者：李盼来[1,2] 徐征[1] 赵谡玲[1] 张福俊[1] 张妍斐[1] 

机构地区：[1]北京交通大学、光电子技术研究所、发光与光信息技术教育部重点实验室,北京100044 [2]河北大学物理科学与技术学院,河北保定071002

出　　处：《光电子．激光》2012年第10期1851-1855,共5页Journal of Optoelectronics·Laser

基　　金：国家"973"计划(2010CB327704);国家自然科学基金(60978060;10974013);教育部新世纪优秀人才支持计划(NCET-10-0220);中央高校基本科研业务费专项资金(2012JBZ001);教育部博士点基金(20090009110027);北京市自然科学基金(1102028);北京交通大学基本科研业务费(2011YJS073);北京交通大学优秀博士生科技创新基金(48034)资助项目

摘　　要：采用高温固相法,制备了适于紫外-近紫外及蓝光激发,主峰位于573nm的Ca2BO3Cl:Eu2+黄色荧光粉。研究了Ce3+以及CaCl2和H3BO3用量对材料发光特性等的影响。结果表明,添加Ce3+,明显增强了Ca2BO3Cl:Eu2+材料在紫外-近紫外区的吸收,有效地提高了材料的发射强度;添加过量的CaCl2或H3BO3,均能提高Ca2BO3Cl:Eu2+材料的发射强度,最佳的CaCl2和H3BO3用量分别为过量5mol%和15mol%。将Ca2BO3Cl:Eu2+材料与460nm InGaN芯片组合,获得了白光发射,色坐标为(0.339,0.351)。Ca2BO3Cl：Eu2＋ yellow phosphor was synthesized by a high temperature solid-state reaction method,and it can be excited by ultraviolet-near ultraviolet and blue light irradiation.The final phase is investigated with the conventional X-ray diffraction（XRD）.The spectral characteristics of the phosphor are studied by using a Hitachi F-4600 fluorescence spectrophotometer equipped with a 450 W Xe lamp.The effects of Ce3＋,CaCl2 and H3BO3 on the crystal structure and luminescent properties of Ca2BO3Cl：Eu2＋ are studied.The results show that its emission intensity can be effectively enhanced by increasing absorption in the region of ultraviolet-near ultraviolet light,which is from the sensitizer Ce3＋.The emission intensity of Ca2BO3Cl：Eu2＋ can also be enhanced by the excess CaCl2 and H3BO3,and the optimal excess mole concentrations are 5 mol% and 15 mol%,respectively.White LED is fabricated with the phosphor and the 460 nm InGaN LED chip,and the CIE chromaticity coordinate is （0.339,0.351）.

关 键 词：白光发光二极管(LED) Ca2BO3Cl EU CACL2 H3BO3 CE 

分 类 号：O644[理学—物理化学] O428.3[理学—化学]