Alsam Amani A, Kaynar U H, Aydin H, Coban M B, Canimoglu A, Can N
Jazan University, College of Science, Department of Physical Sciences, Chemistry Division, P.O. Box 114, 45142, Jazan, Saudi Arabia.
Bakırcay University, Faculty of Engineering and Architecture, Department of Fundamental Sciences, Menemen, Izmir, Turkiye; Bakırçay University, Biomedical Technologies Design Application and Research Center, Menemen, Izmir, Turkiye.
Appl Radiat Isot. 2025 Mar;217:111635. doi: 10.1016/j.apradiso.2024.111635. Epub 2024 Dec 11.
This study investigates the structural and luminescent properties UV radiation of Tb³⁺-doped K₇CaY₂(B₅O₁₀)₃ (KCYBO) phosphors prepared using a microwave-assisted sol-gel method, with a focus on the impact of Na⁺ co-doping. Tb³⁺ ions were effectively integrated as evidenced by X-ray diffraction (XRD) and Rietveld analysis, without disrupting the crystal structure. Photoluminescence (PL) analysis showed intense green emissions at 542 nm, which are due to the D₄ → F₅ transition in Tb³⁺. Optimal luminescence was observed at 3 wt% Tb³⁺, beyond which concentration quenching effect was driven by non-radiative cross-relaxation between adjacent Tb³⁺ ions. Na⁺ co-doping enhanced PL intensity by improving energy transfer and reducing non-radiative losses. CIE chromaticity coordinates demonstrated a tunable color shift towards warmer tones with increasing Na⁺ concentration. Thermal stability was assessed through the Arrhenius equation, with an activation energy of 0.31 eV, indicating the material's potential for high-temperature optoelectronic applications.
本研究调查了采用微波辅助溶胶 - 凝胶法制备的掺Tb³⁺的K₇CaY₂(B₅O₁₀)₃（KCYBO）荧光粉的结构和发光特性以及紫外线辐射情况，重点关注Na⁺共掺杂的影响。X射线衍射（XRD）和Rietveld分析表明Tb³⁺离子有效地整合到晶体结构中，且未破坏晶体结构。光致发光（PL）分析显示在542 nm处有强烈的绿色发射，这是由于Tb³⁺中的D₄ → F₅跃迁所致。在Tb³⁺含量为3 wt%时观察到最佳发光效果，超过此含量，相邻Tb³⁺离子之间的非辐射交叉弛豫导致浓度猝灭效应。Na⁺共掺杂通过改善能量转移和减少非辐射损失提高了PL强度。CIE色度坐标表明，随着Na⁺浓度的增加，颜色向暖色调发生可调谐的偏移。通过阿伦尼乌斯方程评估了热稳定性，激活能为0.31 eV，表明该材料在高温光电子应用方面具有潜力。
