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微观组织及晶体结构对Y_6WO_(12):Eu^(3+)荧光性能的影响(英文) 被引量:2

Dependence of Photoluminescence Properties of Y_6WO_(12):Eu^(3+) Phosphors on Microstructure and Crystal Structure
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摘要 本文采用柠檬酸复合物法合成了立方及菱方结构的Y_6WO_(12):Eu^(3+)多晶样品.采用X-射线衍射、拉曼、稳态荧光及瞬态衰减测试手段对样品的晶体结构、荧光性能进行了表征.结果表明立方及菱方结构的荧光粉中的WO_6基团和Eu^(3+)离子分别可被近紫外光和蓝光所激发,但WO_6基团在室温下不产生荧光.荧光粉的光致发光光谱以Eu^(3+)离子的~5D_0-~7F_2 或 ~5D_0-~7F1跃迁所产生的红光发射为主.随着荧光粉焙烧温度及晶体结构的变化,荧光粉的激发、发射和瞬态衰减光谱相应的发生系统变化.本文从W^(6+)and Eu^(3+)离子晶体环境变化的角度对发光性能的变化进行了计论. Polycrystalline Y 6WO 12:Eu 3+phosphors in cubic and rhombohedral phases were synthesized by using a citrate-complexation method.The structural and photoluminescence(PL)properties of the as-prepared phosphors were characterized by powder X-ray diffraction(XRD),Raman,stable-state PL and temporal decay.It was revealed that the phosphors in both cubic and rhombohedral phases could be excited by near-UV and blue light via WO 6 groups and Eu 3+ions,respectively.However,the WO 6 groups show no luminescence at room temperature,and the PL is dominated by the red-emitting of Eu 3+ions 5 D 0-7 F 2 or 5 D 0-7 F 1 transition.At the same time,the PL excitation,emission and temporal decay spectra of the phosphors vary systematically with the calcination temperature as well as the crystal structure.The evolution was discussed from the standing point of the local environment of W 6+and Eu 3+ions.
作者 李怀勇 房璐 李淼淼 孙文芝 位登虎 李艳 马康熙 王雅好 LI Huai-yong;FANG Lu;LI Miao-miao;SUN Wen-zhi;WEI Den-hu;LI Yan;MA Kang-xi;WANG Ya-hao(School of Materials Science and Engineering,Liaocheng University,Liaocheng 252059,China)
出处 《聊城大学学报(自然科学版)》 2018年第3期38-45,共8页 Journal of Liaocheng University:Natural Science Edition
基金 国家自然科学基金项目(51302125,51802137) 山东省自然科学基金项目(ZR2017QB017) 聊城大学大学生科技文化创新基金项目(26312171913,26312171920)资助
关键词 钨酸盐 铕离子 荧光性能 能量传递 tungstates europium ion red luminescence energy transfer
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