中文摘要：

水热法合成了均匀管状Tm^3＋，Ho^3＋和Yb^3＋三掺的YPO4微纳米管，在波长为980nm的近红外光激发下能够发射出红绿蓝三条可见光谱带以及中心波长位于795nm的近红外发射带，从而实现上转换白光发射。通过TEM，XRD和荧光光谱等表征手段对合成的Tm^3＋，Ho^3＋和Yb^3＋三掺YPO4微纳米管进行了结构和性能分析，结果表明，合成的YPO4微纳米管为纯净六方相，水热反应温度对荧光材料的发射光谱有较明显的影响，然而对材料物相的影响却不大。在相同反应温度下，随着掺杂稀土离子浓度的升高，相应发射峰的强度并不是单调的增强，而是由于浓度猝灭和交叉弛豫等因素呈现非单调性的变化。探讨了可能的上转换发射机制。这种上转换发射强度可调控荧光材料在三维固体显示、上转换荧光照明以及荧光探测等领域有潜在的应用。

英文摘要：

Tm^3＋, Ho^3＋ , Yb^3＋ co-doped YPO4 micro-nano tubes were synthesized by hydrothermal method. Under the 980 nm near infrared（NI） excitation, the micro-nano tubes emitted red, green, blue visible light and a near infrared emission centered at 795 nm. The optical properties and structure of the synthesized Tm^3＋ , Ho^3＋ , Yb^3＋ co-doped YPO4 micro-nano tubes were characterized by testing the TEM, XRD and fluorescence spectra. The results showed that the micro-nano tubes are pure hexagonal phase. The hydrotherrnal temperature had obvious effect on fluorescence spectra but little effect on phase. The intensity of the emission peaks didn＇t increase with the concentration of doping ions monotonously under the same reaction temperature, but changed non-monotonously due to the concentration quenching and cross relation. The possible upconversion（UC） mechanism was discussed in this paper. This UC emission intensity controllable fluorescent material has potential application in three dimension solid display, UC illumination, fluorescence detection and some other fields.