Green emitting novel Terbium oxalate decahydrate nanophosphor (Tb₂(C₂O₄)₃.10H₂O) with particle size in the range 2–4 nm, was synthesized by microwave assisted co-precipitation method. The structure and particle size of the sample were elucidated by X-ray powder diffraction and TEM analysis. The photoluminescence excitation spectra of the terbium oxalate nanophosphor exhibited several peaks in the 200-500 nm range of DUV to visible region with the strongest one at 369 nm in n-UV region and these excitation peaks matches well with the emission peaks of commercially available LED sources. The emission spectra recorded at the representative excitations exhibit intense and sharp green emission (⁵D₄→⁷F₅, at 543 nm) owing to the heavy population of ⁵D₄ level at the expense of ⁵D₃ level of Terbium ion. The decay curve is fitted to single exponential function with a decay time of 0.82 ms. The chromaticity co-ordinate is found to be (0.25, 0.54) and is located in green region with a colour purity of 68%. The experimental observations revealed that the synthesized ultrafine terbium oxalate nanocrystal is a suitable candidate as green emitting phosphor.

通过微波辅助共沉淀法合成了绿色新型的草酸十水合草酸纳米磷（Tb ₂（C ₂ O ₄）₃ .10H ₂ O），粒径为2-4 nm。通过X射线粉末衍射和TEM分析来阐明样品的结构和粒度。草酸ter纳米磷光体的光致发光激发光谱在DUV到可见光区域的200-500 nm范围内表现出多个峰，在n-UV区域中的369 nm处表现出最强的峰，这些激发峰与市售LED的发射峰相匹配。资料来源。在代表性激发下记录的发射光谱显示出强烈而尖锐的绿色发射（⁵D ₄ → ⁷ F ₅，在543 nm处），这是由于⁵ D ₄能级的大量填充而以⁵ D ₃能级的ion离子为代价。衰减曲线拟合单个指数函数，衰减时间为0.82 ms。色度坐标为（0.25，0.54），位于绿色区域，色纯度为68％。实验观察表明，合成的草酸fine超细纳米晶是适合作为绿色荧光粉的候选物。