YVO₄:Eu³⁺ phosphors have been subject of studies in recent years because of their intense luminescence, their various applications in lighting devices and, recently, because of their potential use in biological probes resulting from their low toxicity. Achieving YVO₄:Eu³⁺ nanophosphors with size less than 20 nm has been a difficult task due to the annealing treatments used during their synthesis. In this work we synthesized nanophosphors with average crystallite sizes up to 6 nm by a simple chemical coprecipitation method at room temperature without subsequent annealing treatment. Using Rietveld refinement, the formation of Y_1-xEu_xVO₄ solid solutions, where Eu³⁺ occupies the positions of Y³⁺ in the host crystal, is verified. Emission lines from activator depend on the synthesis method used and the local environment of Eu³⁺ which is different in bulk phosphors and nanophosphors; furthermore, decay time is shorter for bulk phosphors and not for nanophosphors as might be expected. The crystallite size achieved, the simplicity of the synthesis method and the identified luminescent properties offer a range of new applications for synthesized nanophosphors.

YVO ₄：Eu ³⁺磷光体由于其强烈的发光，在照明设备中的各种应用以及最近由于其低毒性而在生物探针中的潜在应用而成为近年来的研究对象。由于尺寸小于20 nm的YVO ₄：Eu ³⁺纳米磷光体的合成过程中需要进行退火处理，因此实现这一目标一直是一项艰巨的任务。在这项工作中，我们通过简单的化学共沉淀法在室温下合成了微晶平均粒径最大为6 nm的纳米磷光体，而无需随后的退火处理。使用Rietveld精炼，形成Y _1-x Eu _x VO ₄验证了固溶体，其中Eu ³⁺在主体晶体中占据Y ³⁺的位置。活化剂的发射线取决于所用的合成方法和Eu ³⁺的局部环境，这在本体荧光粉和纳米荧光粉中有所不同。此外，对于体态磷光体而言，衰减时间更短，而对于纳米磷光体而言，衰减时间则不如预期的那样。所获得的微晶尺寸，合成方法的简便性和确定的发光特性为合成的纳米磷光体提供了一系列新的应用。