绿光SrAl_2O_4∶Eu~(2+),Dy~(3+)到近红外光LiGa_5O_8∶Cr~(3+)的余辉能量传递及近红外余辉增强
|
摘要
相较于蓝绿光长余辉材料,近红光长余辉材料不仅种类少,其性能也相对较差。本文探索基于余辉能量传递的机理,实现将绿光长余辉材料Sr Al_2O_4∶Eu~(2+),Dy~(3+)的余辉能量传递给近红外光长余辉材料Li Ga_5O_8∶Cr~(3+),以此来增强Li Ga_5O_8∶Cr~(3+)的余辉性能。实验首先采用高温固相法分别合成Sr Al_2O_4∶Eu~(2+),Dy~(3+)和LiGa_5O_8∶Cr~(3+),然后再按不同的质量比例混合均匀,最后测试混合材料的余辉光谱性能。实验结果表明,与Sr Al_2O_4∶Eu~(2+),Dy~(3+)混合后,来自于Li Ga_5O_8∶Cr~(3+)的718 nm近红外余辉增强;不同比例下混合后Li Ga_5O_8∶Cr~(3+)的余辉光谱增强效果不一,其中两者比例为1∶1时,能量传递效率最佳,Li Ga_5O_8∶Cr~(3+)的余辉最强。最后在监测Li Ga_5O_8∶Cr~(3+)的余辉718 nm的热释曲线中呈现了明显的Sr Al_2O_4∶Eu~(2+),Dy~(3+)的热释峰,是两者之间存在能量传递的重要证据。该结果阐明了两种长余辉材料间余辉能量传递的可行性,为改善近红外长余辉材料余辉性能提供了一种有潜力的方法。
Near-infrared persistent luminescent materials are catching extensive attention for their distinctive features in bio-imaging application. However,comparison with the excellent afterglow properties of green and blue persistent luminescent materials,the afterglow of near-infrared persistent luminescent material is urgent to be improved. This paper proposed a persistent energy transfer enhancement strategy to improve the near-infrared afterglow of LiGa_5O_8∶Cr~(3+)through the radiative energy transfer from SrAl_2O_4∶Eu~(2+),Dy~(3+)to LiGa_5O_8∶Cr~(3+). In this work,SrAl_2O_4∶Eu~(2+),Dy~(3+)and LiGa_5O_8∶Cr~(3+)were synthesized by solid state reaction,and then the afterglow properties were characterized for the composites with various weight ratios. The results show that the near-infrared( 718 nm) afterglow decay time of the SrAl_2O_4∶Eu~(2+),Dy~(3+)/LiGa_5O_8∶Cr~(3+)composites became longer than pure Li Ga_5O_8∶Cr~(3+),under the excitation of 348 nm. Moreover,the afterglow enhancement was different for various weight ratios composites. When the ratio was 1∶ 1,the afterglow at 718 nmof LiGa_5O_8∶ Cr~(3+)was strongest,indicating the most efficiency of energy transfer. In addition,the TL peaks belonging to SrAl_2O_4∶Eu~(2+),Dy~(3+)were recorded in the TL curve,by monitoring at 718 nm.This is a substantial proof for the persistent energy transfer from SrAl_2O_4∶Eu~(2+),Dy~(3+)to LiGa_5O_8∶Cr~(3+). These results demonstrate the feasibility of the persistent energy transfer between two long afterglow luminescent materials,and provide a potential approach to improve the afterglow properties of near-infrared persistent luminescent materials.
Near-infrared persistent luminescent materials are catching extensive attention for their distinctive features in bio-imaging application. However,comparison with the excellent afterglow properties of green and blue persistent luminescent materials,the afterglow of near-infrared persistent luminescent material is urgent to be improved. This paper proposed a persistent energy transfer enhancement strategy to improve the near-infrared afterglow of LiGa_5O_8∶Cr~(3+)through the radiative energy transfer from SrAl_2O_4∶Eu~(2+),Dy~(3+)to LiGa_5O_8∶Cr~(3+). In this work,SrAl_2O_4∶Eu~(2+),Dy~(3+)and LiGa_5O_8∶Cr~(3+)were synthesized by solid state reaction,and then the afterglow properties were characterized for the composites with various weight ratios. The results show that the near-infrared( 718 nm) afterglow decay time of the SrAl_2O_4∶Eu~(2+),Dy~(3+)/LiGa_5O_8∶Cr~(3+)composites became longer than pure Li Ga_5O_8∶Cr~(3+),under the excitation of 348 nm. Moreover,the afterglow enhancement was different for various weight ratios composites. When the ratio was 1∶ 1,the afterglow at 718 nmof LiGa_5O_8∶ Cr~(3+)was strongest,indicating the most efficiency of energy transfer. In addition,the TL peaks belonging to SrAl_2O_4∶Eu~(2+),Dy~(3+)were recorded in the TL curve,by monitoring at 718 nm.This is a substantial proof for the persistent energy transfer from SrAl_2O_4∶Eu~(2+),Dy~(3+)to LiGa_5O_8∶Cr~(3+). These results demonstrate the feasibility of the persistent energy transfer between two long afterglow luminescent materials,and provide a potential approach to improve the afterglow properties of near-infrared persistent luminescent materials.
引文
[1]WU S,PAN Z,CHEN R,et al..Long Afterglow Phosphorescent Materials[M].Berlin:Springer International Publishing,2017.
[2]CHAE K W,PARK T R,CHEON C I,et al..Persistent luminescence of Sr Al2O4∶Eu,Dy thin films on alumina and sapphire substrates[J].Sci.Adv.Mater.,2018,10(3):362-366.
[3]CHEN Z,GUO X,GE M.Warm-toned,color-tunable,and highly emissive long lasting phosphorescent composite:PM-MA/RECC@Sr Al2O4∶Eu2+,Dy3+[J].J.Lumin.,2017,194:200-207.
[4]LONG J,YUAN X,MA C,et al..Strongly enhanced luminescence of Sr4Al14O25∶Mn4+phosphor by co-doping B3+and Na+ions with red emission for plant growth LEDs[J].RSC Adv.,2018,8(3):1469-1476.
[5]PAN L P,LIU S L,ZHANG X L,et al..Optimization method for blue Sr2MgSi2O7∶Eu2+,Dy3+phosphors produced by microwave synthesis route[J].J.Alloys Compd.,2017,737:39-45.
[6]HAI O,JIANG H Y,ZHANG Q,et al..Effect of cooling rate on the microstructure and luminescence properties of Sr2MgSi2O7∶Eu2+,Dy3+materials[J].Luminescence,2017,32(8):1442-1447.
[7]LUO H,BOS A J J,DORENBOS P.Charge carrier trapping processes in RE2O2S(RE=La,Gd,Y and Lu)[J].JPCC,2017,121(16):8760.
[8]LU F Q,SU J,ZHANG Q Y,et al..Influence of oxygen vacancy on persistent luminescence in Zn Ga2O4∶Cr3+and identification of electron carriers[J].Opt.Mater.Express,2017,7(3):734.
[9]XUE F H,HU Y H,FAN L M,et al..Cr3+-activated Li5Zn8Al5Ge9O36:a near-infrared long-afterglow phosphor[J].J.Am.Ceram.Soc.,2017,100(7):3070-3079.
[10]杨小平,崔瑞瑞,张弛,等.新型近红外超长余辉材料Zn3Al2Ge2O10∶Cr3+的发光性能[J].发光学报,2014,35(3):300-305.YANG X P,CUI R R,ZHANG C,et al..Luminescence properties of a novel near-infrared super-long afterglow material Zn3Al2Ge2O10∶Cr3+[J].Chin.J.Lumin.,2014,35(3):300-305.(in Chinese)
[11]SMET P,AVCI N,POELMAN D.Red persistent luminescence in rare-earthcodoped Ca2Si S4∶Eu2+[J].J.Lumin.,2008,129(10):1140-1143.
[12]ABE S,UEMATSU K,TODA K,et al..Luminescent properties of red long persistence phosphors,Ba Mg2Si2O7∶Eu2+,Mn2+[J].J.Alloys Compd.,2006,408(3):911-914.
[13]XU S,WANG Z,LI P,et al..White-emitting phosphor Ba2B2O5∶Ce3+,Tb3+,Sm3+:luminescence,energy transfer,and thermal stability[J].J.Am.Ceram.Soc.,2017,100:2069-2080.
[14]LIN L,YIN M,SHI C,et al..Luminescence properties of a new red long-lasting phosphor:Mg2Si O4∶Dy3+,Mn2+[J].Cheminform,2008,455(1-2):327-330.
[15]LIANG Y,LIU F,CHEN Y,et al..Red/near-infrared/short-wave infrared multi-band persistent luminescence in Pr3+-doped persistent phosphors[J].Dalton Trans.,2017,46(34):11149-11153.
[16]LI Y,LI Y Y,SHARAFUDEEN K,et al..A strategy for developing near infrared long-persistent phosphors:taking MAl O3∶Mn4+,Ge4+(M=La,Gd)as an example[J].J.Mater.Chem.C,2014,2(11):2019-2027.
[17]LI X,TANG X,WANG Z,et al..Structural,persistent luminescence properties and trap characteristics of an orthosilicate phosphor:Li Ga Si O4∶Mn2+[J].J.Alloys Compd.,2017,721:512-519.
[18]吴冬妮,崔瑞瑞,龚新勇,等.新型红色荧光粉Na La0.7(MoO4)(2-x)(WO4)x∶0.3Eu3+的制备及发光性质研究[J].发光学报,2016,37(3):274-279.WU D N,CUI R R,GONG X Y,et al..Synthesis and photoluminescence properties of Na La0.7(MoO4)(2-x)(WO4)x∶0.3Eu3+novel red phosphor[J].Chin.J.Lumin.,2016,37(3):274-279.(in Chinese)
[19]CHERMONT Q,CHANAC C,SEGUIN J,et al..Nanoprobes with near-infrared persistent luminescence for in vivo imaging[J].Proc.Natl.Acad.Sci.USA,2007,104(22):9266-9271.
[20]CHEN Z,ZHENG W,HUANG P,et al..Lanthanide-doped luminescent nano-bioprobes for the detection of tumor markers[J].Nanoscale,2015,7(10):4274-4290.
[21]LI Y,GECEVICIUS M,QIU J.Long persistent phosphors-from fundamentals to applications[J].Chem.Soc.Rev.,2016,45(8):2090-2136.
[22]MATSUZAWA T,AOKI Y,TAKEUCHI N,et al..A new long phosphorescent phosphor with high brightness,Sr Al2O4∶Eu2+,Dy3+[J].J.Electrochem.Soc.,1996,143:2670-2673.
[23]CLERCQ O Q Q D,MARTIN L I D J,KORTHOUT K E,et al..Probing the local structure of the near-infrared emitting persistent phosphor Li Ga5O8∶Cr3+[J].J.Mater.Chem.C,2017,5(4):10861-10868.
[24]SHI R,QI M,NING L,et al..Combined experimental and ab initio study of site preference of Ce3+in Sr Al2O4[J].JPCC,2015,119(33):19326-19332.
[2]CHAE K W,PARK T R,CHEON C I,et al..Persistent luminescence of Sr Al2O4∶Eu,Dy thin films on alumina and sapphire substrates[J].Sci.Adv.Mater.,2018,10(3):362-366.
[3]CHEN Z,GUO X,GE M.Warm-toned,color-tunable,and highly emissive long lasting phosphorescent composite:PM-MA/RECC@Sr Al2O4∶Eu2+,Dy3+[J].J.Lumin.,2017,194:200-207.
[4]LONG J,YUAN X,MA C,et al..Strongly enhanced luminescence of Sr4Al14O25∶Mn4+phosphor by co-doping B3+and Na+ions with red emission for plant growth LEDs[J].RSC Adv.,2018,8(3):1469-1476.
[5]PAN L P,LIU S L,ZHANG X L,et al..Optimization method for blue Sr2MgSi2O7∶Eu2+,Dy3+phosphors produced by microwave synthesis route[J].J.Alloys Compd.,2017,737:39-45.
[6]HAI O,JIANG H Y,ZHANG Q,et al..Effect of cooling rate on the microstructure and luminescence properties of Sr2MgSi2O7∶Eu2+,Dy3+materials[J].Luminescence,2017,32(8):1442-1447.
[7]LUO H,BOS A J J,DORENBOS P.Charge carrier trapping processes in RE2O2S(RE=La,Gd,Y and Lu)[J].JPCC,2017,121(16):8760.
[8]LU F Q,SU J,ZHANG Q Y,et al..Influence of oxygen vacancy on persistent luminescence in Zn Ga2O4∶Cr3+and identification of electron carriers[J].Opt.Mater.Express,2017,7(3):734.
[9]XUE F H,HU Y H,FAN L M,et al..Cr3+-activated Li5Zn8Al5Ge9O36:a near-infrared long-afterglow phosphor[J].J.Am.Ceram.Soc.,2017,100(7):3070-3079.
[10]杨小平,崔瑞瑞,张弛,等.新型近红外超长余辉材料Zn3Al2Ge2O10∶Cr3+的发光性能[J].发光学报,2014,35(3):300-305.YANG X P,CUI R R,ZHANG C,et al..Luminescence properties of a novel near-infrared super-long afterglow material Zn3Al2Ge2O10∶Cr3+[J].Chin.J.Lumin.,2014,35(3):300-305.(in Chinese)
[11]SMET P,AVCI N,POELMAN D.Red persistent luminescence in rare-earthcodoped Ca2Si S4∶Eu2+[J].J.Lumin.,2008,129(10):1140-1143.
[12]ABE S,UEMATSU K,TODA K,et al..Luminescent properties of red long persistence phosphors,Ba Mg2Si2O7∶Eu2+,Mn2+[J].J.Alloys Compd.,2006,408(3):911-914.
[13]XU S,WANG Z,LI P,et al..White-emitting phosphor Ba2B2O5∶Ce3+,Tb3+,Sm3+:luminescence,energy transfer,and thermal stability[J].J.Am.Ceram.Soc.,2017,100:2069-2080.
[14]LIN L,YIN M,SHI C,et al..Luminescence properties of a new red long-lasting phosphor:Mg2Si O4∶Dy3+,Mn2+[J].Cheminform,2008,455(1-2):327-330.
[15]LIANG Y,LIU F,CHEN Y,et al..Red/near-infrared/short-wave infrared multi-band persistent luminescence in Pr3+-doped persistent phosphors[J].Dalton Trans.,2017,46(34):11149-11153.
[16]LI Y,LI Y Y,SHARAFUDEEN K,et al..A strategy for developing near infrared long-persistent phosphors:taking MAl O3∶Mn4+,Ge4+(M=La,Gd)as an example[J].J.Mater.Chem.C,2014,2(11):2019-2027.
[17]LI X,TANG X,WANG Z,et al..Structural,persistent luminescence properties and trap characteristics of an orthosilicate phosphor:Li Ga Si O4∶Mn2+[J].J.Alloys Compd.,2017,721:512-519.
[18]吴冬妮,崔瑞瑞,龚新勇,等.新型红色荧光粉Na La0.7(MoO4)(2-x)(WO4)x∶0.3Eu3+的制备及发光性质研究[J].发光学报,2016,37(3):274-279.WU D N,CUI R R,GONG X Y,et al..Synthesis and photoluminescence properties of Na La0.7(MoO4)(2-x)(WO4)x∶0.3Eu3+novel red phosphor[J].Chin.J.Lumin.,2016,37(3):274-279.(in Chinese)
[19]CHERMONT Q,CHANAC C,SEGUIN J,et al..Nanoprobes with near-infrared persistent luminescence for in vivo imaging[J].Proc.Natl.Acad.Sci.USA,2007,104(22):9266-9271.
[20]CHEN Z,ZHENG W,HUANG P,et al..Lanthanide-doped luminescent nano-bioprobes for the detection of tumor markers[J].Nanoscale,2015,7(10):4274-4290.
[21]LI Y,GECEVICIUS M,QIU J.Long persistent phosphors-from fundamentals to applications[J].Chem.Soc.Rev.,2016,45(8):2090-2136.
[22]MATSUZAWA T,AOKI Y,TAKEUCHI N,et al..A new long phosphorescent phosphor with high brightness,Sr Al2O4∶Eu2+,Dy3+[J].J.Electrochem.Soc.,1996,143:2670-2673.
[23]CLERCQ O Q Q D,MARTIN L I D J,KORTHOUT K E,et al..Probing the local structure of the near-infrared emitting persistent phosphor Li Ga5O8∶Cr3+[J].J.Mater.Chem.C,2017,5(4):10861-10868.
[24]SHI R,QI M,NING L,et al..Combined experimental and ab initio study of site preference of Ce3+in Sr Al2O4[J].JPCC,2015,119(33):19326-19332.