Yb~(3+)共掺杂Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+)长余辉发光材料的制备与性能研究
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摘要
通过高温固相法制备了Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+),Yb~(3+)长余辉发光材料。采用XRD、SEM、激发光谱、发射光谱和余辉衰减曲线对Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+),Yb~(3+)长余辉发光材料的微观结构以及光学性能进行了表征,研究结果表明Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+),Yb~(3+)长余辉发光材料的晶体结构和显微结构均未发生明显变化。Yb~(3+)的引入使得Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+)显示出更优良的荧光性能和余辉性能,不同Yb~(3+)掺量对长余辉发光材料的陷阱深度和电子传输速率有显著影响。实验表明,当Yb~(3+)掺杂量为0.03时,Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+),Yb~(3+)的荧光光谱相对强度最强,且表现出最佳的余辉衰减性能。
Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+),Yb~(3+)long afterglow phosphors were prepared via high-temperature solid state reaction.Microstructure and optical properties of Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+),Yb~(3+) long afterglow phosphors were characterized through XRD,SEM,excitation spectrum,emission spectrum and decay curves.The results show that the crystal structure and microstructure of Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+),Yb~(3+) have not changed significantly.The addition of Yb~(3+) ions shows a remarkable change in fluorescent properties and afterglow performance.The introduction of Yb~(3+)makes Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+),Yb~(3+) have better fluorescence performance and afterglow properties.Different Yb~(3+) doping amounts have a significant effect on the trap depth and electron transport rate of the long afterglow phosphors.When the doping amount of Yb~(3+)equals to 0.03,experiments show that the Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+),Yb~(3+)has the strongest fluorescence intensity and the best afterglow attenuation performance.
Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+),Yb~(3+)long afterglow phosphors were prepared via high-temperature solid state reaction.Microstructure and optical properties of Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+),Yb~(3+) long afterglow phosphors were characterized through XRD,SEM,excitation spectrum,emission spectrum and decay curves.The results show that the crystal structure and microstructure of Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+),Yb~(3+) have not changed significantly.The addition of Yb~(3+) ions shows a remarkable change in fluorescent properties and afterglow performance.The introduction of Yb~(3+)makes Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+),Yb~(3+) have better fluorescence performance and afterglow properties.Different Yb~(3+) doping amounts have a significant effect on the trap depth and electron transport rate of the long afterglow phosphors.When the doping amount of Yb~(3+)equals to 0.03,experiments show that the Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+),Yb~(3+)has the strongest fluorescence intensity and the best afterglow attenuation performance.
引文
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[3] LI Y,WANG Y,XU X,GONG Y.Effects of non-stoichiometry on crystallinity,photoluminescence and afterglow properties of Sr2MgSi2O7∶Eu2+,Dy3+ phosphors[J].Journal of Luminescence,2009,129(10):1 230-1 234.
[4] WU H,HU Y,WANG Y,et al.Influence on the luminescence properties of the lattice defects in Sr2MgSi2O7∶Eu2+,M (M = Dy3+,La3+,or Na1+)[J].Journal of Alloys and Compounds,2010,497(1-2):330-335.
[5] FURUSHO H,H?LS? J,LAAMANEN T,et al.Probing lattice defects in Sr2MgSi2O7∶Eu2+,Dy3+[J].Journal of Luminescence,2008,128(5-6):881-884.
[6] LI F,LI Z,WANG X,et al.Crystal structure and luminescent property of flaky-shaped Sr4Al14O25∶Eu2+,Dy3+ phosphor doped with Er3+ ions[J].Journal of Alloys and Compounds,2016,692:10-21.
[7] CAI Y,LI F,CHANG S,et al.Er3+ co-doped Sr1.956MgSi2O7∶0.004Eu2+,0.04Dy3+ phosphors and enhancement of luminescent properties[J].Journal of Materials Science:Materials in Electronics,2018,29(11):8 952-8 957.
[8] KRISHNAN R,THIRUMALAI J.Correction:Synthesis and up/down conversion luminescence properties of Na0.5R0.5 MoO4:Ln3+(R3+=La,Gd),(Ln3+=Eu,Tb,Dy,Yb/Er) thin phosphor films grown by pulsed laser deposition technique[J].RSC Advances,2014,4:64 258-64 266.
[9] CHEN R,WANG Y,HU Y,et al.Modification on luminescent properties of SrAl2O4∶Eu2+,Dy3+ phosphor by Yb3+ ions doping[J].Journal of Luminescence,2008,128(7):1 180-1 184.
[10] WANG X,LI F,ZUO G,et al.Enhanced afterglow properties of Nd3+ co-doped Sr2MgSi2O7∶Eu2+,Dy3+ synthesized by sol-gel method[J].Ceramics International,2016,42(16):19 441-19 444.
[11] WU H,HU Y,WANG Y,et al.Influence on luminescent properties of the Sr2MgSi2O7∶Eu2+ by Dy3+ Nd3+ co-doping[J].Journal of Alloys and Compounds,2009,486(1-2):549-553.
[12] LI Y,WANG Y.Enhancement of long-persistence by Ce3+ co-doping in Sr2MgSi2O7∶Eu2+,Dy3+ blue phosphor[J].Journal of Physics:Conference Series,2009,152(1):1-6.
[13] LI Y,WANG Y,YU G,et al.Enhanced long-persistence of Sr2MgSi2O7∶Eu2+,Dy3+ phosphors by codoping with Ce3+[J].Journal of the Electrochemical Society,2009,156(4):J77-J80.
[14] 陈将,江国健,周鹏,等.燃烧合成Eu2+,Eu3+,Dy3+掺杂硅酸镁锶材料及其性能研究[J].陶瓷学报,2017,38(1):59-62.
[15] PAN W,NING G,LIN Y,et al.A new co-activator Gd2O3 to Eu2O3 and Dy2O3 doped alkaline earth silicate phosphors[J].Journal of Rare Earths,2007,25:305-309.
[16] SINGH D,TANWAR V,SIMANTILLEKE A P,et al.Rapid synthesis and enhancement in down conversion emission properties of BaAl2O4∶Eu2+,RE3+ (RE3+=Y,Pr) nanophosphors[J].Journal of Materials Science:Materials in Electronics,2016,27(3):2 260-2 266
[17] BLASSE G.Fluorescence of Eu2+-activated alkaline-earth aluminates[J].Philips Research Reports,1968,23:201-206.
[18] SHIRAKURA S,TODA K,IMANARI Y,et al.Sol-gel synthesis of long persistent phosphor Sr2MgSi2O7∶Eu,Dy thin film[J].Journal of the Ceramic Society of Japan,2005,113(1 319):484-487.