用溶剂热法合成Yb^3+、Er^3+共掺的NaYF4纳米上转换材料,研究了去离子水、乙醇两种反应溶剂对材料性能的影响.用X射线衍射光谱、扫描电镜和荧光光谱等测试手段对材料性能进行了对比分析.结果表明:以乙醇为溶剂并加入一定比例的EDTA,所制备的上转换材料能发射较强的、可被太阳电池吸收的可见光.
Nanoparticles of Yb^3+, Er^3+ -codoped sodium yttrium fluoride were prepared by solventthermal method. The properties of the prepared materials were characterized. The up-conversion lumines- cent properties of the NaYF4:Yb^3+, Er^3+ nanoparticles were investigated. The effect of deionized water and ethanol as reaction medium on the performance of the up-conversion materials was studied. The results showed that the up-conversion nanoparticles had relatively high up-conversion effect when ethanol was used as reaction medium and simultaneously ethylenediaminetetraacetic acid (EDTA) was also added. The up-conversion phosphors emit visible light which could be well utilized by solar cells.