NaErF_(4):Tm^(3+)在1550nm激发下的上转换发光与光致发热特性

Upconversion Luminescence and Optical Heating of NaErF_(4):Tm^(3+) under 1550nm Excitation

采用水热法制备六方相稀土氟化物微晶(NaErF_(4):Tm^(3+)).在第二生物窗口辐射(1 550 nm)下,其发射高强度的第一生物窗口辐射,即远红光和近红外光.由于自敏化剂Er^(3+)的浓度高达98.5%,所以上转换发光会伴随高强度的光致热效应.研究显示,六方相NaErF_(4):Tm^(3+)微晶是一种潜在的具有“双生物窗口”特征的稀土光加热器.

In this paper, a simple and environment friendly hydrothermal method was used to prepare a hexagonal rare-earth-based fluoride microcrystals NaErF_(4):Tm^(3+). Upon excitation with the second biological window radiation(1 550 nm), it emits high-intensity first biological window radiation, i.e., far-red and near-infrared. Meanwhile, due to the high concentration of self-sensitizer Er^(3+) as high as 98.5%, the upconversion luminescence is accompanied by a strong photothermal effect. Our study shows that the hexagonal NaErF_(4):Tm^(3+) microcrystals is a potential rare-earth-based photoheater with “dual biological window” feature.