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用化学共沉淀法制备了ZrO2:Er3+Yb3+纳米晶粉体,所制备的纳米晶粉体具有较强的室温上转换发射和红外发射.研究了样品的晶体结构和上转换发光性质随着Yb3+掺杂浓度和煅烧温度的变化关系.通过X射线衍射谱分析发现,经800℃煅烧2h后得到的ZrO2:Er3+Yb3+纳米晶是四方相和单斜相的混合结构,经950℃煅烧2h后得到的样品以单斜相为主,随着Yb3+浓度的增加四方相增多.对800℃煅烧下Er3+,Yb3+共掺的样品,随着Yb3+浓度的增加,绿光和红光上转换发射强度都增大,但是红光上转换发射谱发射强度的增长幅度明显要强于绿光上转换发射谱发射强度的增长幅度.对样品上转换发射谱的分析发现,上转换红光、绿光的发射都是双光子过程.
The ZrO2: Er3 + Yb3 + nanocrystalline powders were prepared by chemical coprecipitation method, and the prepared nanocrystalline powders have strong transition emission and infrared emission at room temperature.The crystal structure and up-conversion luminescence properties of the samples were investigated with Yb3 + The results show that the ZrO2: Er3 + Yb3 + nanocrystals obtained after calcination at 800 ℃ for 2h are a mixture of tetragonal and monoclinic phases, and after calcination at 950 ℃ for 2h The samples were mainly monoclinic, and the tetragonal phase increased with the increase of Yb3 + concentration.With the increase of Yb3 + concentration, both the emission intensities of green and red light were But the increase of emission intensity of the upconversion emission spectrum is obviously stronger than that of the emission spectrum of green upconversion emission spectrum.The analysis of the up-conversion emission spectrum of the sample shows that both up-conversion red emission and green emission emission Is a two-photon process.