立方相NaYF_4∶Ce^(3+)材料的合成及上转换发光性能  

Hydrothermal Synthesis and Up-conversion Luminescent Properties of NaYF_4∶Ce^(3+) Cubic Phase

作　　者：陈喜蓉[1] 陈早明[2] 胡德远[1] 

机构地区：[1]江西理工大学冶金与化学工程学院,赣州341000 [2]江西理工大学工程研究院,赣州341000

出　　处：《材料导报》2012年第8期11-13,共3页Materials Reports

基　　金：江西省教育厅科研项目(gjj11122);江西理工大学博士启动基金(02939)

摘　　要：以氟化钠、硝酸钇、硝酸铈为原料,采用水热法和共沉淀法合成棒状NaYF4∶Ce3+材料,利用XRD、SEM、红外光谱、荧光光谱分析仪对其结构和发光性能进行表征。结果表明,制备样品均为立方相结构,表面含有以化学吸附方式存在的EDTA分子。经水热法制备样品的上转换发射发射出波长在404.5nm和436nm处的蓝光,以及波长在520.5nm和539nm处的绿光。NaYF4 ： Ce^3＋ luminescent materials were synthesized by hydrothermal method and copreciptation using sodium fluoride, yttrium nitrate, cerous nitrate as raw materials. The obtained samples were characterized by X- ray powder diffraction（XRD）, scanning electron microscopy（SEM）, Fourier transform infrared （FT-rR） spectra and luminescence spectrum. The XRD resulting of NaYF4 ： Ce^3＋ materials are mainly cubic phase and the FT-IR spectra prove the presence of EDTA at the surface of crystals. Under continuous-wave excitation of 980nm laser, the NaYF ： Ce^3＋ samples prepared by hydrothermal exhibit strong up conversion light. The blue emission from Ce3＋ at 404.5nm and at 436nm, the green emission at 520. 5nm and at 539nm,indicative of the great potential for the NaYF4 ： Ce3＋ samples to be used on solar cell.

关 键 词：上转换光 水热法 Ce3+ 蓝光发射 绿光发射 

分 类 号：O482.31[理学—固体物理]