Pr^(3+),Yb^(3+)共掺YPO_4下转换材料的制备及其转光效率  

Downconversion Materials Preparation and The Research of Conversion Efficiency in Pr^(3+),Yb^(3+) Co-doped YPO_4

作　　者：李开宇[1] 王如志[1] 曲铭浩[1] 张影[1] 严辉[1] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124

出　　处：《发光学报》2012年第5期486-491,共6页Chinese Journal of Luminescence

基　　金：国家自然科学基金(51032002;11074017;11174021);北京市"学术创新团队建设计划"项目(PHR201007101);北京市科技新星计划(2008B10);北京市自然科学基金(1102006);北京工业大学基础研究基金资助项目

摘　　要：采用固相反应法制备了Pr3+,Yb3+共掺杂的YPO4下转换发光粉体,并在450 nm光激发条件下,研究了Yb3+不同摩尔分数(0%,1%,2%,4%,20%,30%)对转光效率的影响。结果表明:不同Yb3+浓度的样品,其荧光峰强度不同,这可能是由于Pr3+-Yb3+之间Yb3+浓度不同存在能量传递效率差异的原因。研究也发现了样品的下转换发光,其能量传递过程为:Pr3+:3P0→Yb3+:2F5/2+2F5/2。荧光光谱测试结果表明,Yb3+的最佳掺杂摩尔分数为2%。Pr3+,Yb3+共掺杂的YPO4材料在提高太阳能电池光电转换效率方面具有潜在的应用。Pr3＋,Yb3＋ co-doped YPO4 downconversion phosphor powders were prepared by solid state reaction.When excitation at 450 nm,the effects of different Yb3＋ mole fractions（0%,1%,2%,4%,20%,30%） on the conversion efficiency are studied.Results shows that because of the difference of energy transfer efficiency between Pr3＋ and Yb3＋,the samples with various Yb3＋ doping concentrations have different fluorescence intensity.It is also found that the energy transfer process of the downconversion luminescence in samples is Pr3＋：3P0→Yb3＋：2F5/2＋2F5/2.From photoluminescence spectra measurement,the optimal doping mole fraction of Yb3＋ is 2%.The results indicate that Pr3＋,Yb3＋ co-doped YPO4 downconversion phosphor is a kind of potential material which may be used to improve the solar cell efficency.

关 键 词：下转换 稀土离子 YPO4 太阳能电池 

分 类 号：O482.31[理学—固体物理]