Development of a novel Eu3+-doped tantalate red-emitting phosphor for w-LEDs application

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外文摘要：Two novel phosphors LiBa4(1-x)Eu4xTa3O12(H-LBTO∶xEu3+)and Li0.25Ba1-xEuxTa0.75O3(C-LBTO∶xEu3+)were prepared successfully by a molten salt method.The transformation between these two structures was realized by changing the sintering temperature or changing the Eu3+ions concentration,which was also demonstrated by the X-ray diffraction(XRD),scanning electron microscopy(SEM),diffuse reflec-tance spectra(DRS),and photoluminescence excitation(PLE)analyses.Both the sintering temperature and the Eu3+ions doping concentration have significant impact on the formation of the crystal phase.All these phosphors sintered at 1023 K exhibit two major luminescence lines at 594 and 614 nm under near-UV light of 395 nm excitation,corresponding to Eu3+ions typical transitions of 5D0→7F1 and 5D0→7F2.The optimum concentration of Eu3+ions is 9 mol％for C-LBTO:xEu3+samples and the quenching interaction type is the nearest-neighbor ion interaction.The thermal stability of the C-LBTO:0.09Eu3+sample was investigated in detail and the device application further suggests that C-LBTO:0.09Eu3+can be used as a red phosphor for near-UV excited w-LEDs in lighting.

外文关键词：

PhosphorTantalateLED deviceRare earths

作者：

Fan Zeng、Jingjing Ru、Bing Zhao、Feiyun Guo、Jianzhong Chen

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作者单位：

College of Chemistry and Materials,Fujian Province University Key Laboratory of Green Energy and Environment Catalysis,Ningde Normal University,Ningde,352100,China

School of Environment and Resources,School of Carbon Neutral and Modern Industry,Fujian Normal University,Fuzhou,350007,China

College of Information and Mechanical & Electrical Engineering,Ningde Normal University,Ningde,352100,China

College of Chemistry,Fuzhou University,Fuzhou,350108,China

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基金：

Foundation of Fujian Provincial DepartmentInnovative Research Team of Ningde Normal UniversityFujian Provincial Department of Education

项目编号：

2021J0111492023T03JAT210469

出版年：

2024

DOI：

10.1016/j.jre.2023.07.014