水热法制备Na₃PO₄:Ce³⁺/Tb³⁺/Er³⁺纳米荧光粉及其发光性能的研究

Preparation of Na₃PO₄:Ce³⁺/Tb³⁺/Er³⁺ Nanophosphor by Hydrothermal Method and Study on Its Luminescent Properties

摘要: 本文用水热法制备了Na₃PO₄:Ce³⁺/Tb³⁺/Er³⁺纳米荧光粉末，并通过吸收光谱、荧光光谱对其进行表征。在980 nm激发光激发下，粉末样品同时发出蓝、绿、红三波段光，对应的发射峰分别位于436 nm，545 nm，692 nm；同时通过调节激发光功率，发现在不同的激发光功率激发下，各波段的发光强度发生明显变化，这也反应出Ce³⁺与Tb³⁺/Er³⁺离子之间的能量传递过程。因此，通过调节激发光激发功率，可获得不同色度的白光样品。此样品可应用于白光LED的光电应用中。

Abstract: The Na₃PO₄:Ce³⁺/Tb³⁺/Er³⁺ nanophosphors were prepared by the hydrothermal method. Under the excitation of 980 nm exciting light, the obtained Na₃PO₄:Ce³⁺/Tb³⁺/Er³⁺ nanophosphors emitted blue, green, red three waves of light, the corresponding emission peaks were at 436 nm, 545 nm and 692 nm, respectively. The increase in white light emission with the increase of excitation power, which indicates the efficient energy inter-ion transfer from Ce³⁺ to Tb³⁺/Er³⁺ ions. Furthermore, the observed the intense white light emission is suggestive exploration for the present phosphor for potential optoelectronic applications such as white light-emitting phosphor for LED.