通过添加表面活性剂PEG-1000并优化NaAc的用量及反应温度,以水热法制备了γ-ScOOH∶5% Eu、γ-ScOOH+α-ScOOH∶5% Eu、α-ScOOH∶5% Eu及Sc₂O₃∶5% Eu片状、棒状和花状形貌粉体。结果表明,在254 nm的光激发下,所有样品发射出了615 nm的红光,其中,Sc₂O₃∶Eu粉体具有最强的红光发射,这是因为ScOOH中有较多的羟基,其声子能量高(约1 550 cm^-1),导致更多的光子能量损失,从而导致发光减弱;同时,高温煅烧提高了Sc₂O₃∶Eu的结晶性,进一步增强了发光。

Through incorporating PEG-1000 surfactant,and optimizing NaAc dosage and reaction temperature,γ-ScOOH∶5% Eu,γ-ScOOH+α-ScOOH∶5% Eu,α-ScOOH∶5% Eu,and Sc₂O₃∶5% Eu powders with plate-like,rod-like,and flower-like morphologies are successfully synthesized via a hydrothermal method.The results indicate that under 254 nm light excitation,all samples emit red light at 615 nm.Among them,Sc₂O₃∶Eu powder exhibits the strongest red emission,which is attributed to the higher hydroxyl content in ScOOH,which leads to greater phonon energy (approximately 1 550 cm^-1),resulting in increased photon energy loss and consequently weaker luminescence.Additionally,high-temperature calcination improves the crystallinity of Sc₂O₃∶Eu,further enhancing its luminescent property.

刘杰(1999-),男,硕士生,研究方向为稀土掺杂上转换发光纳米材料,prodigal9524@163.com;刘敏(1981-),女,博士,副教授,研究方向为稀土掺杂上转换发光纳米材料,通讯联系人,liumin1106@ustc.edu.cn。