Abstract Er3+ and Yb3+ codoped MoS2 powders have been fabricated by hydrothermal synthesis. The impact of Er3+ and Yb3+ codoping on the structure, morphology, energy band structure and upconversion photoluminescence properties of samples have been studied by XRD, SEM, TEM, XPS and UPL. XRD results reveal that the crystal structure of samples is well matched with the 2H–MoS2, and the crystallinity of MoS2–Er:Yb significantly increases after annealing. The morphology of samples prepared by hydrothermal synthesis presents flower-like balls composed of nanosheets, while the annealed MoS2–Er:Yb samples are the triangular sheet. A small amount of Er3+ and Yb3+ ions doping has little effect on the band structure of MoS2 but the number of carriers. The MoS2–Er:Yb powders show strong green emission at 528 nm, 549 nm and weak red emission at 662 nm under 800 nm and 980 nm laser light pumping, which stem from the Er3+ transition of (2H11/2, 4S3/2)→4I15/2 and 4F9/2 → 4I15/2. Therefore, the MoS2–Er:Yb powders can be a promising material in phosphors, biomedical imaging, dye-sensitized solar cells, etc.

中文翻译：

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Er3+和Yb3+共掺杂MoS2粉末的上转换光致发光

摘要 通过水热合成法制备了 Er3+ 和 Yb3+ 共掺杂的 MoS2 粉末。通过XRD、SEM、TEM、XPS和UPL研究了Er3+和Yb3+共掺杂对样品结构、形貌、能带结构和上转换光致发光性能的影响。XRD 结果表明样品的晶体结构与 2H-MoS2 很好地匹配，并且退火后 MoS2-Er:Yb 的结晶度显着增加。水热合成制备的样品形貌呈现由纳米片组成的花状球体，而退火后的 MoS2–Er:Yb 样品则为三角形片。少量的 Er3+ 和 Yb3+ 离子掺杂对 MoS2 的能带结构影响不大，但对载流子数量影响不大。MoS2–Er:Yb 粉末在 528 nm 处显示出强烈的绿色发射，在 800 nm 和 980 nm 激光泵浦下，549 nm 和 662 nm 处的弱红色发射源于 (2H11/2, 4S3/2)→4I15/2 和 4F9/2 → 4I15/2 的 Er3+ 跃迁。因此，MoS2–Er:Yb 粉末在荧光粉、生物医学成像、染料敏化太阳能电池等方面是一种很有前途的材料。