Halefoglu Yusuf Ziya, Oglakci M, Yuksel M, Canimoglu A, Topaksu M, Can N
Cukurova University, Faculty of Arts, Department of Ceramic, 01330, Adana, Turkey.
Physics Department, Cukurova University, Arts-Sciences Faculty, 01330, Adana, Turkey.
Appl Radiat Isot. 2019 Dec;154:108876. doi: 10.1016/j.apradiso.2019.108876. Epub 2019 Aug 22.
In this study, we performed X-ray diffraction (XRD) and environmental scanning electron microscope (ESEM) techniques to examine the structure and morphological observation of the samples and thermoluminescence (TL) experiments to extract the trapping parameters and dosimetric properties of LaAlBO phosphors doped with Eu at various doping concentrations. Diffraction patterns of obtained sample were well consistent JCPDS card No 98-009-7945, indicating the formation of pure phase. The TL kinetic parameters were estimated by CGCD software. TL glow curves of LaAlBO:Eu consist of 12 trap levels and exhibited dominantly first order kinetics. Photoluminescence (PL) emission was observed in the range 400-800 nm for LaAlBO phosphor doped with Eu. The dominant emission of Eu corresponding to the electric dipole transition D → F is located at 616 nm. The sharp emission properties exhibited demonstrate that the LaAlBO is a suitable host for rare-earth ion doped phosphor material. It is observed that for the variable concentration of Eu on PL studies, the PL intensity augments with increase in the dopant concentration and the concentration quenching was found after 1 mass% of Eu. The PL experimental results reveal that LaAlBO:Eu phosphor as an red emitting phosphor may be promising luminescence materials for the optoelectronic applications.
在本研究中，我们采用X射线衍射（XRD）和环境扫描电子显微镜（ESEM）技术对样品进行结构和形态观察，并通过热释光（TL）实验来提取不同掺杂浓度下Eu掺杂的LaAlBO荧光粉的俘获参数和剂量学性质。所得样品的衍射图谱与JCPDS卡片编号98 - 009 - 7945完全一致，表明形成了纯相。TL动力学参数通过CGCD软件估算。LaAlBO:Eu的TL发光曲线由12个陷阱能级组成，主要呈现一级动力学。对于掺杂Eu的LaAlBO荧光粉，在400 - 800 nm范围内观察到光致发光（PL）发射。Eu对应的电偶极跃迁D→F的主要发射位于616 nm处。所展示的尖锐发射特性表明LaAlBO是稀土离子掺杂荧光粉材料的合适基质。观察到在PL研究中，随着Eu浓度的变化，PL强度随掺杂剂浓度的增加而增强，并且在Eu含量为1质量%后发现浓度猝灭。PL实验结果表明，LaAlBO:Eu荧光粉作为一种红色发射荧光粉，可能是用于光电子应用的有前景的发光材料。
