Visible to ultraviolet up-conversion in a novel rare earth-free up-converting phosphor

作     者：En Zhou Liu Jun Fan Xiao Yun Hu Wen Qian Hou Hong Zhe Dai 

作者机构：School of Chemical EngineeringNorthwest UniversityXi'an 710069China Department of PhysicsNorthwest UniversityXi'an 710069China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2012年第23卷第1期

页      面：117-120页

核心收录：

学科分类：080902[工学-电路与系统] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the National Natural Science Foundation of China(No.20876125) the Research Fund for the Doctoral Program of Higher Education(No.20096101110013) Northwest University Graduate Cross-discipline Funds(Nos.09YJC24 and 09YJC27) 

主　　题：Up converting phosphor Luminescence properties Fluorides CaF_2 

摘      要：A novel up-converting phosphor,Na_xAl_yF_（x＋3y）/CaF2（0.3 〈 x 〈 0.5,0 〈 y 〈 0.1） composite,is prepared by a hydrothermal process at 180°C and an annealing treatment at 500℃.X-ray diffraction（XRD） pattern indicates that Na_xAl_yF_（x＋3y）/CaF_2 is a composite consisting of NaF,Na_3 AlF_6,and CaF_*** up-conversion luminescence properties of this phosphor are investigated by fluorescence *** show that Na_xAl_yF_（x＋3y）/CaF_2 exhibits visible-to-ultraviolet up-conversion luminescence *** emission peaks at 316 and 336 nm are observed when excited by 610 nm,the luminescence lifetime of the emissions is great than 18 ms,and the internal fluorescence quantum yield is 4.2%.Additionally,the luminescent mechanism of this phosphor is also mentioned.