Vu Nguyen, Minh Ngo Khac Khong, Hien Thai Thi Dieu, Roan Pham Duc, Giang Lam Thi Kieu, Huong Nguyen Thanh, Khuyen Hoang Thi, Lien Pham Thi, Tien Dinh Manh, Kien Nguyen Trung, Nhiem Dao Ngoc
Institute of Materials Sciences, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Street Hanoi 100000 Vietnam
Can Tho University of Technology 256 Nguyen Van Cu Street Can Tho City 900000 Vietnam.
Nanoscale Adv. 2025 May 27;7(13):4077-4086. doi: 10.1039/d4na01052c. eCollection 2025 Jun 24.
Eu materials were synthesized a simple combustion method. Material characterization illustrated the formation of spherical particles with a tetragonal crystal structure and a uniform size of 20 nm, although aggregation was observed. Fluorescence spectroscopy was then employed to explore the optical characteristics, revealing key insights into the luminescent behavior of the as-prepared materials. A detailed examination of the branching ratio of the D → F electronic transition relative to the D → F transition was performed, which is closely tied to the symmetry of the local environment of the Eu activators. This investigation utilized Judd-Ofelt theory to calculate intensity and emission parameters. Additionally, the fluorescence lifetime of the material was measured under various V/P ratios, elucidating the relationship between these variables. Finally, the emission color and correlated color temperature (CCT) of the synthesized material were evaluated through the CIE 1931 chromaticity diagram, confirming its potential for use in optical applications based on its tunable emission characteristics.
Eu材料通过一种简单的燃烧方法合成。材料表征表明形成了具有四方晶体结构且尺寸均匀为20 nm的球形颗粒，不过观察到了团聚现象。然后采用荧光光谱法探究光学特性，揭示了所制备材料发光行为的关键见解。对相对于D→F跃迁的D→F电子跃迁的分支比进行了详细研究，这与Eu激活剂局部环境的对称性密切相关。该研究利用Judd-Ofelt理论计算强度和发射参数。此外，在不同的V/P比下测量了材料的荧光寿命，阐明了这些变量之间的关系。最后，通过CIE 1931色度图评估了合成材料的发射颜色和相关色温（CCT），基于其可调发射特性证实了其在光学应用中的潜力。
