2022年10月20日 · Here, we report a strategy to expand the color-adjustable emission range by regulating the doping concentration of Yb 3+ in core@shell (C@S) upconversion nanoparticles (UCNPs) under the excitation of near-infrared (NIR) light at 980 nm and promoting the energy-transfer process.

2014年3月13日 · su y v er等∞’ ¨ 对稀土离子掺杂的N a Y F 4 为基质的上转换荧光材料进行了广泛研究。 稀土离子中， E r“具有十分丰富的能级， 对位于红外区的几个特定波长存在较强的吸收， 而且其绿色荧光具有较高的猝灭浓度， 因此E ， ＋ 是实现红外到可见上转换荧光和激光材料的重要激活剂。 Y b “以其特殊的能级结构和长激发态寿命等特点，可作为优良的敏化离子， 提高上转换效率。 E r 3＋的4 In ， ： 能级、 Y b3＋ 的2L ， ： 能级与激发波长为9 80n m的激光二极 …

2022年3月8日 · In this study, NaYF 4:Yb,Er UCNPs, widely used for luminescence and photophysical studies, were modified with a set of four different coordinatively bound surface ligands, i.e., citrate,...

2023年12月16日 · The codoping of Yb and Er in the core layer could promote the energy transfer from Yb to Er and then enhance the UC intensity. The maximum Sr of 1.02 % K −1 at 313 K and S a of 0.0045 K −1 at 413 K are achieved in the cubic NaYF 4: 20Yb2Er@NaYF 4 core/shell NCs, which show promising applications in the temperature sensing field.

通过 TEM 、 SEM 、 XRD 、 FTIR 、光纤光谱和 Zeta电位 等表征手段提出了多巴胺修饰NaYF4∶Yb，Er的作用机理，多巴胺通过与UCNPs表面的CTAB间的静电吸附作用粘附在UCNPs表面。

Upconversion core/shell nanocrystals with different mean sizes ranging from 15 to 45 nm were prepared via a modified synthesis procedure based on anhydrous rare-earth acetates.

2017年1月20日 · Here, we designed and fabricated the colloidal Au-Ag nanocage@NaYF4@NaYF4:Yb,Er core-shell hybrid with different intermediate thickness (NaYF4) and tunable SPR peaks from visible wavelength...

摘要：染料敏化太阳能电池由于其低成本，易于制造，环境友好，转换效率高等优点而被视为硅基太阳能电池的替代者。然而，染料敏化太阳能电池效率的进一步提高却受到光谱适配效应的严重限制，因为其只能吸收波长为300-800nm范围的光，而占太阳光谱一半能量左右的红外光却不能被其 …

NaYF4:Yb,Er,Tb@NaYF4:Yb,Tb/NH2-MIL-88B (Fe)复合光催化剂的构建用于有效光催化降解抗生素 光催化是一种有效且稳健的降解水环境污染物的策略。 然而，由于抗生素的稳定性突出，其分解仍然是一个令人困惑的问题。

Doping with Ce3+ ions also decreased the AR of the UCNRs from 2.80 to 1.27. In addition, highly transparent polymer composites for 3D volumetric displays were fabricated by blending high-AR β-NaYF4:Yb,Er/Tm UCNRs with polydimethylsiloxane. These composites exhibited bright green and blue upconversion light during excitation with 980 nm light.