YAG∶Ce,Yb近红外下转换荧光粉中的离子簇集
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摘要
通过457 nm和915 nm连续激光器对固相反应法和溶胶-凝胶法制备的YAG:Ce,Yb荧光粉中的Yb~(3+)近红外发光和可见上转换发光能量转移机制进行了研究。两种激发下,溶胶-凝胶法样品的近红外发光猝灭浓度均在5%左右,发光强度变化曲线趋势相近;固相反应法产物,915 nm直接激发猝灭浓度为5%左右,457 nm间接激发猝灭浓度为10%左右,说明固相反应法掺杂离子分布更不均匀。样品中存在来自Yb~(3+)到杂质离子间能量传递和Yb~(3+)-Yb~(3+)离子对的两种上转换发光;固相反应法产物Yb~(3+)-Yb~(3+)离子对协同发光强于溶胶-凝胶法产物,说明Yb~(3+)离子簇集现象较为明显,可能降低此类材料的实际近红外转换效率。
457 nm and 915 nm continuous lasers were used to study the Yb~(3+) near-infrared luminescence and up-conversion energy transfer mechanisms in YAG:Ce, Yb phosphors synthesized via solid-state reaction and sol-gel method. Under either excitation, sol-gel samples demonstrated the same Yb~(3+) near-infrared luminescence quenching concentration of-5%, with similar trends. In solid-state reaction samples, 915 nm excitation yielded a quenching concentration of -5%, while 457 nm excitation resulted in a quenching concentration of 10%, indicating a less homogeneous distribution of dopant ions. Visible upconversion luminescence from Yb~(3+)-impurity ion and Yb~(3+)-Yb~(3+) ion pairs can be observed. Solid-state reaction samples demonstrate stronger cooperative luminescence from Yb~(3+)-Yb~(3+) ion pairs. The results show that clustering of Yb~(3+) ions is more significant in samples synthesized via solid-state reaction,which could lower the near-infrared down-conversion efficiency of this type of material.
457 nm and 915 nm continuous lasers were used to study the Yb~(3+) near-infrared luminescence and up-conversion energy transfer mechanisms in YAG:Ce, Yb phosphors synthesized via solid-state reaction and sol-gel method. Under either excitation, sol-gel samples demonstrated the same Yb~(3+) near-infrared luminescence quenching concentration of-5%, with similar trends. In solid-state reaction samples, 915 nm excitation yielded a quenching concentration of -5%, while 457 nm excitation resulted in a quenching concentration of 10%, indicating a less homogeneous distribution of dopant ions. Visible upconversion luminescence from Yb~(3+)-impurity ion and Yb~(3+)-Yb~(3+) ion pairs can be observed. Solid-state reaction samples demonstrate stronger cooperative luminescence from Yb~(3+)-Yb~(3+) ion pairs. The results show that clustering of Yb~(3+) ions is more significant in samples synthesized via solid-state reaction,which could lower the near-infrared down-conversion efficiency of this type of material.
引文
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[2] Zhang Y, Li L, Zhang X, et al. Temperature effects on photoluminescence of YAG:Ce3+phosphor and performance in white light-emitting diodes[J]. Journal of Rare Earths, 2008, 26(3):446-449.
[3] Song Zhaoyuan, Shao Qiufeng, Feng Weijian, et al.Judd-Ofelt theory analysis and spectroscopic properties of Er3+-doped cadmium aluminium silicate glass[J].Infrared and Laser Engineering, 2017, 46(2):0220001.(in Chinese)
[4] Zhang Yulu, Hui Yongling, Jiang Menghua, et al.Experimental study of LD-pumped erbium ytterbium co-doped phosphate glass passively Q-switched microlaser[J]. Infrared and Laser Engineering, 2017,46(3):0305004.(in Chinese)
[5] Li Tong, Zhang Meiling, Wang Fei, et al. Fabrication of optical waveguide amplifiers based on bonding-type NaYF4:Er nanoparticles-polymer[J]. Chinese Optics,2017, 10(2):219-225.(in Chinese)
[6] Liu X, Teng Y, Zhuang Y, et al. Broadband conversion of visible light to near-infrared emission by Ce3+, Yb3+-codoped yttrium aluminum garnet[J]. Opt Lett, 2009,34(22):3565-3567.
[7] Fang Z, Cao R, Zhang F, et al. Efficient spectral conversion from visible to near-infrared in transparent glass ceramics containing Ce3+-Yb3+codoped Y3Al5O12nanocrystals[J]. Journal of Materials Chemistry C,2014, 2(12):2204-2211.
[8] Yu D C, Rabouw F T, Boon W Q, et al. Insights into the energy transfer mechanism in Ce3+-Yb3+codoped YAG phosphors[J]. Physical Review B, 2014, 90(16):165126.
[9] Kumar K S, Lou C, Xie Y, et al. Energy transfer in coand tri-doped Y3Al5O12phosphors[J]. Journal of Rare Earths, 2017, 35(8):775-782.
[10] Yang P, Deng P, Yin Z. Concentration quenching in Yb:YAG[J]. Journal of Luminescence, 2002, 97(1):51-54.
[11] Nakazawa E, Shionoya S. Cooperative luminescence in YbPO4[J]. Physical Review Letters, 1970, 25(25):1710.
[12] Maciel G S, Biswas A, Prasad P N. Infrared-to-visible Eu3+energy upconversion due to cooperative energy transfer from an Yb3+ion pair in a sol-gel processed multi-component silica glass[J]. Optics Communications,2000, 178(1):65-69.
[13] Montoya E, Espeso O, BausáL E. Cooperative luminescence in Yb3+:LiNbO3[J]. Journal of Luminescence, 2000, 87:1036-1038.
[14] Qiao X, Tsuboi T. Excimer-like Yb3+-pair and photoluminescence spectra of Yb3+-molybdates[J]. Journal of Alloys and Compounds, 2017, 724:520-527.
[15] Qin W P, Liu Z Y, Sin C N, et al. Multi-ion cooperative processes in Yb3+clusters[J]. Light:Science and Applications, 2014, 3(8):e193.
[16] Auzel F, Meichenin D, Pelle F, et al. Cooperative luminescence as a defining process for RE-ions clustering in glasses and crystals[J]. Optical Materials,1994, 4(1):35-41.
[17] Schaudel B, Goldner P, Prassas M, et al. Cooperative luminescence as a probe of clustering in Yb3+doped glasses[J]. Journal of Alloys and Compounds, 2000,300:443-449.
[18] Pollnau M, Gamelin D R, Lüthi S R, et al. Power dependence of upconversion luminescence in lanthanide and transition-metal-ion systems[J]. Physical Review B, 2000, 61(5):3337-3346.
[19] Suyver J, Aebischer A, Garcia-Revilla S, et al.Anomalous power dependence of sensitized upconversion luminescence[J]. Physical Review B,2005, 71(12):125123.
[20] Kir′yanov A V, Aboites V, Belovolov A M, et al.Visible-to-near-IR luminescence at stepwise upconversion in Yb,Ho:GGG under IR diode pumping[J].Journal of Luminescence, 2003, 102(Supplement C):715-721.
[21] Xu X, Zhao Z, Song P, et al. Optical spectroscopy of Yb3Al5O12single crystal[J]. Spectrochimica Acta Part A:Molecular and Biomolecular Spectroscopy, 2005, 62(1-3):645-648.
[22] Yang L, Song H, Yu L, et al. Unusual power-dependent and time-dependent upconversion luminescence in nanocrystals Y2O3:Ho3+/Yb3+[J]. Journal of Luminescence,2006, 116(1):101-106.