近紫外光激发KBaGd(MoO_4)_3:Dy~(3+)荧光粉的制备及发光性能
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摘要
采用溶胶-凝胶法制备了KBa Gd(Mo O_4)_3∶Dy~(3+)荧光粉,并借助于扫描电镜(SEM)、X射线粉末衍射(XRD)、激发光谱、发射光谱及荧光衰减曲线等测试手段对其形貌、结构及光谱性能进行了分析。结果显示:与高温固相反应法相比,采用溶胶-凝胶法得到的样品粒径均匀,且形状更加规则。在近紫外光(390 nm)的激发下,KBa Gd(Mo O_4)_3∶Dy~(3+)荧光粉的两个主发射峰分别位于485 nm与577 nm处,样品蓝黄比约为0.7。在KBa Gd(Mo O_4)_3基质中,Dy~(3+)离子的最佳掺杂摩尔分数为10%,引起浓度猝灭的机理是激活离子间的电偶极间相互作用。随着Dy~(3+)离子浓度的升高,样品荧光寿命缩短,且荧光衰减曲线逐渐偏离单指数变化。
KBa Gd(Mo O_4)_3∶Dy~(3+)phosphors were synthesized by sol-gel method,and their morphology,structure and spectral properties were investigated by means of SEM,XRD,excitation and luminescent spectra,as well as luminescent decay curves.The results show that the shape and the particle size distribution of samples synthesized by sol-gel method are more regular and narrower than those synthesized by solid state method.Under the excitation of near UV light(390 nm),the samples exhibit two intensive emission bands around 485 nm and 577 nm,and the value of B/Y is about0.7.In the host of KBa Gd(Mo O_4)_3,the optimum mole fraction of Dy~(3+)is 10%,and the concentration quenching effect is caused by dipole-dipole interactions between Dy~(3+)ions.The luminescent lifetime becomes shorter and the decay curves become nonexponential with the increasing of Dy~(3+)concentration.
KBa Gd(Mo O_4)_3∶Dy~(3+)phosphors were synthesized by sol-gel method,and their morphology,structure and spectral properties were investigated by means of SEM,XRD,excitation and luminescent spectra,as well as luminescent decay curves.The results show that the shape and the particle size distribution of samples synthesized by sol-gel method are more regular and narrower than those synthesized by solid state method.Under the excitation of near UV light(390 nm),the samples exhibit two intensive emission bands around 485 nm and 577 nm,and the value of B/Y is about0.7.In the host of KBa Gd(Mo O_4)_3,the optimum mole fraction of Dy~(3+)is 10%,and the concentration quenching effect is caused by dipole-dipole interactions between Dy~(3+)ions.The luminescent lifetime becomes shorter and the decay curves become nonexponential with the increasing of Dy~(3+)concentration.
引文
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[2]SONG M J,WU M Y,ZHOU W W,et al..Growth,structure and spectral properties of Dy3+-doped Li3Ba2La3(Mo O4)8crystal for potential use in solid-state yellow lasers[J].J.Alloys Compd.,2014,607(15):110-117.
[3]WANG G Q,GONG X H,CHEN Y J,et al..Synthesis and photoluminescence properties of near-UV pumped yellowemitting Li3Ba2La3(WO4)8∶Dy3+phosphors[J].Opt.Mater.,2014,36(7):1255-1259.
[4]宁青菊,王邦卿,郭芳芳,等.Ca2Si O3Cl2∶Dy3+单一基质白光荧光粉的制备及发光特性[J].功能材料,2012,43(9):1126-1129.NING Q J,WANG B Q,GUO F F,et al..Preparation and luminescent properties of the single white emitting phosphors Dy3+doped Ca2Si O3Cl2[J].J.Funct.Mater.,2012,43(9):1126-1129.(in Chinese)
[5]姜永章,夏海平,张加忠,等.单晶体α-Na YF4∶Dy3+的制备及光谱特性[J].光子学报,2015,44(8):0816001.JIANG Y Z,XIA H P,ZHANG J Z,et al..Growth and optical spectra of Dy3+dopedα-Na YF4single crystal[J].Acta Photon.Sinica,2015,44(8):0816001.(in Chinese)
[6]石琳琳,孙佳石,翟梓会,等.组合优化设计制备Y3+/Dy3+共掺Bi2Zn B2O5新型荧光粉的发光性质[J].光子学报,2014,43(11):1116002.SHI L L,SUN J S,ZHAI Z H,et al..Luminescence property in novel Y3+/Dy3+co-doped Bi2Zn B2O5phosphors by assembled optimal design[J].Acta Photon.Sinica,2014,43(11):1116002.(in Chinese)
[7]吴疆,张萍,蒋春东,等.近紫外光激发单一基质白光荧光粉Ca3Y2Si3O12∶Dy3+的制备及发光特性[J].发光学报,2014,35(9):1046-1050.WU J,ZHANG P,JIANG C D,et al..Preparation and luminescent properties of single host white phosphors Ca3Y2Si3O12∶Dy3+excited by near UV light[J].Chin.J.Lumin.,2014,35(9):1046-1050.(in Chinese)
[8]杨志平,刘鹏飞,宋延春,等.白光LED用Ba3La(PO4)3∶Dy3+荧光粉的制备与发光性能[J].发光学报,2013,34(1):35-39.YANG Z P,LIU P F,SONG Y C,et al..Preparation and luminescent properties of Ba3La(PO4)3∶Dy3+phosphor for white LEDs[J].Chin.J.Lumin.,2013,34(1):35-39.(in Chinese)
[9]SUN C L,TU C Y.Photoluminescence characteristics of Dy3+doped Y3Ga5O12phosphors for white light emitting diodes[J].Mater.Express,2012,2(2):145-150.
[10]DENG Y M,YI S P,WANG Y H,et al..Synthesis and photoluminescence characteristics of Ln3+(Ln=Sm,Er and Dy)-doped Ba Gd2(Mo O4)4phosphors[J].Opt.Mater.,2014,36(8):1378-1383.
[11]高飞,梁利芳,郭崇峰.LED用红色发光材料Li3Ba2Ln3-xEux(Mo O4)8的制备及性能[J].发光学报,2009,30(5):610-616.GAO F,LIANG L F,GUO C F.Preparation and luminescence of red light emitting phosphors based on Li3Ba2Ln3-xEux-(Mo O4)8by sol-gel method[J].Chin.J.Lumin.,2009,30(5):610-616.(in Chinese)
[12]SHANG M M,LI G G,KANG X J,et al..Synthesis and luminescent properties of Li3Ba2Y3(Mo O4)8∶Ln3+(Ln=Eu,Tb,Dy)phosphors for UV-LEDs[J].J.Electrochem.Soc.,2011,158(5):H565-H571.
[13]MENG X M,LIN Z B,ZHANG L Z,et al..Structure and spectral properties of Nd3+-doped KBa Gd(Mo O4)3crystal with a disorder structure[J].Cryst Eng Comm.,2011,13(12):4069-4073.
[14]YU Y,HUANG Y S,ZHANG L Z,et al..Growth and spectral assessment of Yb3+-doped KBa Gd(Mo O4)3crystal:a candidate for ultrashort pulse and tunable laser[J].Plos One,2013,8(1):e54450.
[15]YU Y,HUANG Y S,ZHANG L Z,et al..Assessment of structure and spectral characteristics of new laser crystal Nd3+∶KBa Y(Mo O4)3[J].J.Alloys Compd.,2015,651(5):164-169.
[16]OFELT G S.Intensities of crystal spectra of rare-earth ions[J].J.Chem.Phys.,1962,37(3):511-520.
[17]CAVALLI E,BOVERO E,BELLETTI A.Optical spectroscopy of Ca Mo O4∶Dy3+single crystals[J].J.Phys.:Condes.Matter,2002,14(20):5221-5228.
[18]DEXTER D L,SCHULMAN J H.Theory of concentration quenching in inorganic phosphors[J].J.Chem.Phys.,1954,22(6):1063-1070.
[19]杨志平,宋延春,韩月,等.白光LED用KNa Ca(PO4)2∶Dy3+材料的制备与发光特性研究[J].功能材料,2012,43(13):1692-1695.YANG Z P,SONG Y C,HAN Y,et al..Luminescent properties of KNa Ca2(PO4)2∶Dy3+phosphor for white LED[J].J.Funct.Mater.,2012,43(13):1692-1695.(in Chinese)
[20]ZHOU J H,YU X,WANG T,et al..A single-phased white-emitting Ca2Ga2Ge O7∶Dy3+phosphor with different charge compensation ions[J].J.Rare Earths,2017,35(3):241-246.