SrBPO5∶Ho3+荧光粉的制备、性能及第一性原理计算  

Preparation,properties and first-principles calculation of SrBPO5:Ho3+ phosphor

作　　者：姜吉琼[1,3] 邹正光[2,3] 李延伟[1] JIANG Ji-qiong;ZOU Zheng-guang;LI Yan-wei(College of Chemistry and Bioengineering,Guilin University of Technology,Guilin 541006,China;College of Materials Science and Engineering,Guilin University of Technology,Guilin 541006,China;College of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China)

机构地区：[1]桂林理工大学化学与生物工程学院,广西桂林541006 [2]桂林理工大学材料科学与工程学院,广西桂林541006 [3]广西大学化学化工学院,南宁530004

出　　处：《桂林理工大学学报》2019年第4期938-943,共6页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(51664012;51562006;51464009);广西自然科学基金项目(2017GXNSFAA198117);广西电化学与磁化学功能材料重点实验室项目(EMFM20181117);广西教育厅科研基金项目(2013YB117)

摘　　要：运用高温固相法合成SrBPO5∶Ho^3+,用X射线衍射仪(XRD)、能谱仪(EDS)以及荧光光度计(PL)对合成产物的结构、组成和发光性质进行了研究。结果表明:少量掺杂Ho不会影响基质的晶体结构,Ho均匀分布在基质材料中;荧光材料呈现出Ho^3+的特征发射,发光区域在绿色区域,当掺杂量为0.03 mol时发射强度最大;掺杂后计算得到SrBPO5∶Ho^3+的VBM和CBM之间的带隙值为5.53 eV,相对掺杂前略微减少,且SrBPO5∶Ho^3+体系属于直接带隙结构,有利于发光;Ho的掺杂在费米能级附近引起杂质能级。SrBPO5∶Ho^3+ was synthesized by high temperature solid phase method.The microstructure,composition,and luminescent performance of the as-prepared SrBPO5∶Ho^3+ were analyzed by X-ray diffraction(XRD),energy dispersive spectroscopy(EDS),and fluorophotometer(PL).The measurement results demonstrated that a small amount of Ho doping does not affect the phase structure of SrBPO5 matrix.Ho dopant was uniformly distributed on the matrix material.The SrBPO5∶Ho^3+ sample exhibited the characteristic emission of Ho^3+ and the luminescent region was in the green region.In particular,the emission intensity reached maximum when Ho doping amount was 0.03 mol.The calculated band gap between VBM and CBM of SrBPO5∶Ho^3+ was 5.53 eV,which is slightly lower than that for the undoped SrBPO5.Band structure analysis reveals SrBPO5∶Ho^3+ has a direct band gap structure,which facilitates luminescence performance.In addition,the Ho dopant introduces impurity energy levels near the Fermi level of SrBPO5∶Ho^3+.

关 键 词：稀土 SrBPO5∶Ho^3+ 荧光粉 发光 绿光 

分 类 号：O482.31[理学—固体物理]