Yu Zhimin, Yang Yang, Sun Jiaming
School of Materials Science and Engineering, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, Tianjin 300350, China.
Nanomaterials (Basel). 2023 Mar 11;13(6):1013. doi: 10.3390/nano13061013.
Y(GdBi)BO phosphors (x = 0, 0.2, 0.4, 0.6, 0.8, and 1.0, YGB) were obtained via high-temperature solid-state synthesis. Differentiated phases and micro-morphologies were determined by adjusting the synthesis temperature and the activator content of Gd ions, verifying the hexagonal phase with an average size of ~200 nm. Strong photon emissions were revealed under both ultraviolet and visible radiation, and the effectiveness of energy transfer from Bi to Gd ions was confirmed to improve the narrow-band ultraviolet-B (UVB) (P→S) emission of Gd ions. The optimal emission was obtained from YGdBiBO phosphor annealed at 800 °C, for which maximum quantum yields (QYs) can reach 24.75% and 1.33% under 273 nm and 532 nm excitations, respectively. The optimal QY from the Gd-Bi co-doped YGB phosphor is 75 times the single Gd-doped one, illustrating that these UVB luminescent phosphors based on co-doped YBO orthoborates possess bright UVB emissions and good excitability under the excitation of different wavelengths. Efficient photon conversion and intense UVB emissions indicate that the multifunctional Gd-Bi co-doped YBO orthoborate is a potential candidate for skin treatment.
通过高温固态合成法制备了Y(GdBi)BO荧光粉（x = 0、0.2、0.4、0.6、0.8和1.0，YGB）。通过调节合成温度和Gd离子的激活剂含量来确定不同的相和微观形貌，证实其为平均尺寸约200 nm的六方相。在紫外光和可见光辐射下均观察到强烈的光子发射，并且证实了从Bi到Gd离子的能量转移效率提高了Gd离子的窄带紫外B（UVB）（P→S）发射。从800 °C退火的YGdBiBO荧光粉获得了最佳发射，在273 nm和532 nm激发下，其最大量子产率（QYs）分别可达24.75%和1.33%。Gd-Bi共掺杂YGB荧光粉的最佳QY是单掺杂Gd荧光粉的75倍，这表明这些基于共掺杂YBO原硼酸盐的UVB发光荧光粉在不同波长激发下具有明亮的UVB发射和良好的激发性。高效的光子转换和强烈的UVB发射表明多功能Gd-Bi共掺杂YBO原硼酸盐是皮肤治疗的潜在候选材料。
