【摘要】 采用共沉淀法在700℃和较短的烧结时间下制备了Zn3(BO3)2和不同浓度的Ce3+、Mn2+离子掺杂的Zn3(BO3)2纳米晶粉末,对合成产物的发光性质及发光机理进行了研究。利用荧光分光光度计、X射线粉末衍射仪以及透射电镜对其光学性能和纳米晶形貌进行了表征。结果表明Ce3+离子掺杂的Zn3(BO3)2样品在340～400nm之间有强的荧光发射,其最高发射峰峰位为365nm,在Ce3+掺量为0.5%(摩尔分数,下同)时发光强度达到最高值。Ce3+取代Zn2+离子作为发光中心,Mn2+离子作为激活剂加入,并不影响荧光发射峰的位置,但能够有效增强其发光强度。当Mn2+离子掺量为0.7%(摩尔分数)时,Ce3+、Mn2+共掺杂的Zn3(BO3)2纳米晶发光强度达到最高值。更多还原

【Abstract】 The Zn3(BO3)2nanocrystals and the Zn3(BO3)2 samples doped with different mole fraction of Ce3+ and Mn2+ were prepared by co-precipitate method at 700℃ and under a short sintering time.The luminescent properties and morphologies of products were investigated by fluorospectrophotometer,X-ray diffractometer,and transmission electron microscope.The results indicate that the Ce3+-doped samples(Zn3(BO3)2∶Ce3+) exhibit strong emission from 340 to 400nm.Furthermore,the luminescent intensity of the Zn3(BO3)2∶Ce3+ sample doped with 0.5% in mole Ce3+ reaches the maximum value.The Ce3+ions substituted for Zn2+ in the host and acted as emission centers,and Mn2+ acted as activator.The position of the emission peak was unchanged,but the emission intensity of Ce3+,Mn2+ co-doped samples was changed obviously with the addition of Ce3+.The luminescent intensity of the Zn3(BO3)2 samples doped with 0.5% in mole Ce3+ and 0.7% in mole Mn2+ reaches the maximum value.更多还原