基于稀土掺杂上转换纳米晶的混合调节荧光色度的研究

Study on the Hybrid Regulation of Fluorescence Chromaticity Based on Rare Earth Doped Upconversion Nanocrystals

本研究利用980 nm激光作为激发光,通过稀土上转换过程实现上转换荧光发射。利用热分解法制备NaYF4:Yb,Tm和NaYF4:Yb,Er纳米晶,获得尺寸小、粒径均匀的纳米晶。通过二者混合,进一步结合稀土离子的上转换荧光光谱探究CIE色度值,获得白光输出。采用点胶法来制作的球冠型涂层结构,此加工方法又因制造工艺比较简单、成本低、操作的重复性能好等等而被用户广泛的应用在全彩LED显示领域的实际工业化应用生产中。

In this study,980 nm laser light was used as excitation light,and upconversion fluorescence emission was achieved through the rare earth upconversion process.Nanocrystals of NaYF4:Yb,Tm and NaYF4:Yb,Er were prepared by thermal decomposition method,and nanocrystals with small size and uniform particle size were obtained.By mixing the two,further combining the upconversion fluorescence spectrum of rare earth ions to explore the CIE chromaticity value,and obtaining white light output.The spherical crown coating structure produced by the dispensing method is widely used by users for practical industrial applications in the field of full color LED display due to its simple manufacturing process,low cost,and good repeatability of operation.