Chingangbam Elizabeth, Wangkhem Ranjoy, Singh N Shanta, Yaiphaba N
Department of Chemistry, Manipur University, Canchipur, 795003, India.
Department of Physics, National Institute of Technology Manipur, Langol, 795004, India.
J Fluoresc. 2025 Jul;35(7):5475-5486. doi: 10.1007/s10895-024-03926-z. Epub 2024 Sep 14.
Bi(0, 1, 3, 5, 7, 10, 12 and 15 at.%) co-doped YPO:Eu have been hydrothermally synthesized. Bi (x ≥ 1 at.%) co-doping in YPO:Eu renders mixed crystalline phase of tetragonal to hexagonal. Pure tetragonal phase of Bi co-doped YPO:Eu could be achieved upon annealing at 900 °C. The luminescence intensity is improved significantly upon annealing at 900 °C. This is due to the reduction of quenching pathways such as water molecules, dangling bonds, etc. The probability of magnetic dipole and electric dipole transitions is observed to be altered. As-prepared samples show near blue emission, while 900 °C annealed samples exhibit red emission, which could be a potential candidate for display, sensing and biological labelling, etc.
已通过水热法合成了Bi（原子百分比为0、1、3、5、7、10、12和15）共掺杂的YPO:Eu。在YPO:Eu中Bi（x≥1原子百分比）共掺杂会使四方相到六方相的混合晶相出现。Bi共掺杂的YPO:Eu在900℃退火后可获得纯四方相。在900℃退火后发光强度显著提高。这是由于诸如水分子、悬空键等猝灭途径的减少。观察到磁偶极和电偶极跃迁的概率发生了变化。制备的样品显示出近蓝光发射，而900℃退火的样品表现出红光发射，这可能是用于显示、传感和生物标记等的潜在候选材料。
