Sm3+掺杂(Na0.2Bi0.2Ba0.2Sr0.2Ca0.2)TiO3高熵粉体的制备及其荧光性能研究

采用固相法制备了稀土Sm³⁺(0~0.10 mol)掺杂的(Na_0.2Bi_0.2Ba_0.2Sr_0.2Ca_0.2)TiO₃高熵荧光粉。研究发现，随着Sm³⁺掺杂量的增加，(Na_0.2Bi_0.2Ba_0.2Sr_0.2Ca_0.2)TiO₃高熵粉体逐渐出现了Sm₂Ti₂O₇杂相，其发光强度发生明显变化。当Sm³⁺掺杂量为0.04 mol时，(Na_0.2Bi_0.2Ba_0.2Sr_0.2Ca_0.2)TiO₃高熵粉体具有单一的钙钛矿结构，且各元素组分分布均匀，并表现出最佳的荧光性能。当掺杂Sm³⁺后，(Na_0.2Bi_0.2Ba_0.2Sr_0.2Ca_0.2)TiO₃高熵荧光粉均表现出色彩较纯的黄光发射。在近紫外的激发下，(Na_0.2Bi_0.2Ba_0.2Sr_0.2Ca_0.2)TiO₃-0.04Sm高熵荧光粉的的色坐标为(0.515 9,0.471 5)，色温为2 469 K，色纯度为83.0%。这表明(Na_0.2Bi_0.2Ba_0.2Sr_0.2Ca_0.2)TiO₃高熵荧光粉在白光LED用的黄光荧光粉中具有很大的应用潜力。

Study on Preparation and Fluorescence Properties of Sm3+Doped(Na0.2Bi0.2Ba0.2Sr0.2Ca0.2)TiO3 High Entropy Phosphor

The rare earth Sm³⁺doped (Na_0.2Bi_0.2Ba_0.2Sr_0.2Ca_0.2)TiO₃ high-entropy phosphor (0~0.10 mol) were prepared by solid-state method. The study found that with the increase of Sm³⁺concentration, the second phase of Sm2Ti2O7 gradually appeared in (Na_0.2Bi_0.2Ba_0.2Sr_0.2Ca_0.2)TiO₃ high entropy powder, and its luminous intensity changed obviously. When the Sm³⁺ions concentration was 0.04mol, a single perovskite structure of the (Na_0.2Bi_0.2Ba_0.2Sr_0.2Ca_0.2)TiO₃ high-entropy powder had a single perovskite structure, and the components of each element were evenly distributed, and exhibited the best fluorescence performance. The (Na_0.2Bi_0.2Ba_0.2Sr_0.2Ca_0.2)TiO₃ high-entropy phosphors showed the pure yellow light emission by doping Sm³⁺ions. Under the excitation near ultraviolet light, the color coordinates of (0.515 9,0.471 5), the color temperature of 2 469 K, and the color purity of 83.0% for (Na_0.2Bi_0.2Ba_0.2Sr_0.2Ca_0.2)TiO₃-0.04Sm high-entroy phosphor were obtained. The results show that the (Na_0.2Bi_0.2Ba_0.2Sr_0.2Ca_0.2)TiO₃ high-entropy phosphors have great potential applications in yellow phosphor for white LED.