中文摘要：

采用静电纺丝与气相还原氮化相结合的方式制备了用于白光LED的CaSi2O2N2：Eu^2＋荧光纤维。通过调节纺丝溶液溶剂的配比,得到了空心结构的Ca-Si-O-Eu纳米纤维和CaSi2O2N2：Eu^2＋荧光纳米纤维。样品在微观上保持中空纤维结构,宏观上也保持薄膜的状态。利用X射线衍射对样品物相结构进行分析,Ca-Si-O-Eu中空纤维在1300℃保温5 h后得到层状结构的CaSi2O2N2,Eu^2＋离子的掺入没有改变CaSi2O2N2的主晶相。在400 nm激发光照射下CaSi2O2N2：Eu^2＋荧光纤维在550 nm附近具有一个宽发射峰,对应着Eu^2＋离子4f^65d→4f^7跃迁。与CaSi2O2N2：Eu^2＋荧光粉或普通荧光纤维膜比较,制备的中空荧光纤维膜有更高的发射光强度。

英文摘要：

Hollow Eu^2＋ doped CaSi2O2N2 and Ca-Si-O-Eu nanofibers were prepared through electrospinning combined with gas-reduction-nitridation method. The Ca-Si-O-Eu precursor was smooth and uniform, has a length arrange from ten to hundred micrometers. The as-obtained sample not only keeps the hollow structure but also assembles to a film. XRD patterns reveal that the sample nitrided under 1300℃ for 5 h are crystallized well and maintained CaSi2O2N2 phase after Eu^2＋ doping. The emission spectra of Eu^2＋ doped CaSi2O2N2 under the 400 nm ultraviolet light irradiation has a board peak centered at 550 nm, which results from Eu^2＋ 5d-4f transition. In comparison with CaSi2O2N2：Eu phosphor powders and fiber film, the hollow CaSi2O2N2：Eu phosphor fiber film has stronger emission intensity under PL measurement.