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材料导报  2019, Vol. 33 Issue (12): 1939-1944    https://doi.org/10.11896/cldb.18040010
  无机非金属及其复合材料 |
溶剂热法合成La1.9Y0.06Mo2O9∶Eu3+Sm3+荧光粉及其能量传递机理
侯芹芹1, 江元汝2, 甘俊羊2, 赵亚娟2, 赵彬2, 韩彤3
1 西安建筑科技大学华清学院,西安 710043
2 西安建筑科技大学理学院,西安 710055
3 西北工业集团,西安 710043
Synthesis and Energy Transfer Mechanism of La1.9Y0.06Mo2O9∶Eu3+Sm3+ Phosphor by Solvent Thermal Method
HOU Qinqin1, JIANG Yuanru2, GAN Junyang2, ZHAO Yajuan2, ZHAO Bin2, HAN Tong3
1 Xi’an University of Architecture and Technology Huaqing Collage, Xi’an 710043
2 School of Science, Xi’an University of Architecture and Technology, Xi’an 710055
3 Northwest Industrial Group, Xi’an 710043
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摘要 以乙二醇为溶剂,采用溶剂热法合成La1.9Y0.06Mo2O9∶Eu3+Sm3+系列荧光粉。通过X射线衍射(XRD)、扫描电镜(SEM)及荧光光谱(PL)研究了La1.9Y0.06Mo2O9∶Eu3+Sm3+荧光粉的晶体结构、不同溶剂比下的形貌及其能量传递机理。XRD结果表明,La1.9Y0.06Mo2O9∶Eu3+Sm3+荧光粉为空间点群P213的立方结构,结晶度高,稀土离子的掺入、溶剂的添加没有改变荧光粉的晶相结构;SEM结果表明,样品为蒲公英3D球形粒子,结构呈网状,壁厚比较薄,形貌规整、尺寸均匀,直径约为8 μm,分散度好。La1.9Y0.06Mo2O9∶16%Eu3+x%Sm3+荧光粉中,Sm3+的共掺有效地改善了Eu3+浓度猝灭现象,Eu3+物质的量浓度为16%时,荧光粉的荧光强度最大,Eu3+浓度增加至20%时,荧光粉才发生浓度猝灭现象。La1.9-Y0.06Mo2O9∶16%Eu3+3%Sm3+在465 nm激发波长下,发射Eu3+的4f特征光谱,其荧光强度约为La1.9Y0.06Mo2O9∶8%Eu3+强度的7倍,说明Sm3+的加入能够有效地增强荧光强度。同时La1.9Y0.06Mo2O9: xEu3+在591 nm、616 nm处强而窄的峰位置未发生变化,且强度明显增加,5D0-7F2的电偶极跃迁仍然最强,发射出典型的红光。La1.9Y0.06Mo2O9∶16%Eu3+y%Sm3+在405 nm激发下,依旧发射Eu3+的4f特征光谱,说明Sm3+能够有效地将能量传递给Eu3+,传递效率约为55%。它们之间的能量传递属于偶级-偶级相互作用(d-d)。
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侯芹芹
江元汝
甘俊羊
赵亚娟
赵彬
韩彤
关键词:  溶剂热  3D蒲公英球形粒子  钐、铀共掺  能量传递  浓度猝灭    
Abstract: La1.9Y0.06Mo2O9∶Eu3+Sm3+ series phosphor powder was synthesized by solvothermal method with ethylene glycol as solvent. The crystal texture, morphology under different solvent ratios and the energy transfer mechanism of La1.9Y0.06Mo2O9∶Eu3+Sm3+ phosphor powder were researched through XRD, SEM and PL.The XRD results showed that: La1.9Y0.06Mo2O9∶Eu3+Sm3+ phosphor powder was the cubic structure of the space point group P123 with a high degree of crystallinity. The doping of rare earth ion and adding of solvent did not change the crystal structure of phosphor powder. SEM found that the sample was dandelion 3D spherical particle with net structure, thin wall, regular shape, uniform size and good dispersion. Its diameter was around 8 μm. In La1.9Y0.06Mo2O9∶Eu3+Sm3+ phosphor powder, the co-doping of Sm3+ effectively improved the concentration quenching of Eu3+. When the concentration of Eu3+ was 16%, fluorescence intensity reached the maximum value, and the concentration quenching occurred when the concentration was increased to 20%. At 465 mm excitation wavelength, 4f characteristic spectrum of Eu3+ was emitted, and La1.9Y0.06Mo2O9∶16%Eu3+3%Sm3+ was about 7 times intensity of La1.9Y0.06Mo2O9∶8%Eu3+. The fluorescence intensity was effectively enhanced by the doping of Sm3+. Meanwhile, the strong but narrow peak position at 591 nm and 616 nm did not change, electric dipole transition of5D0-7F2 remained the strongest, and typical red light was emitted. And under the 405 nm stimulation, the 4f characteristic spectrum of Eu3+ was still emitted, which illustrated that the energy was effectively transferred to Eu3+, with the transfer efficiency of about 55%. The energy transfer belonged to dipole-dipole interaction (d-d).
Key words:  solvothermal method    dandelion 3D spherical particle    Eu3+Sm3+ co-doping    energy transfer    concentration quenching
                    发布日期:  2019-05-31
ZTFLH:  TQ171  
基金资助: 国家自然科学基金(21205092);陕西省教育厅高校教改项目(17BY127);陕西省科技攻关项目(2017GY-178);陕西省专项科研计划项目(16JK2091);西安建筑科技大学华清学院重点教改项目(JG1701)
通讯作者:  1157705332@qq.com   
作者简介:  侯芹芹, 2010年6月毕业于西安建筑科技大学,获得工学硕士学位。工作于西安建筑科技大学华清学院,讲师,主要研究方向为功能材料的合成及其应用。江元汝,西安建筑科技大学教授,陕西省化学会常务理事,无机化学专业委员会副主任。现有8项国家发明专利,其中2项为第一发明人,出版教材、专著5部,发表论文80余篇。主要研究方向为功能材料化学,环境友好过程控制。
引用本文:    
侯芹芹, 江元汝, 甘俊羊, 赵亚娟, 赵彬, 韩彤. 溶剂热法合成La1.9Y0.06Mo2O9∶Eu3+Sm3+荧光粉及其能量传递机理[J]. 材料导报, 2019, 33(12): 1939-1944.
HOU Qinqin, JIANG Yuanru, GAN Junyang, ZHAO Yajuan, ZHAO Bin, HAN Tong. Synthesis and Energy Transfer Mechanism of La1.9Y0.06Mo2O9∶Eu3+Sm3+ Phosphor by Solvent Thermal Method. Materials Reports, 2019, 33(12): 1939-1944.
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http://www.mater-rep.com/CN/10.11896/cldb.18040010  或          http://www.mater-rep.com/CN/Y2019/V33/I12/1939
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