摘要
Nanocrystals of KMgF3 single-doped and codoped with Ce^3+ or/and Yb^3+ were synthesized separately by the mi-croemulsion method. The X-ray diffraction(XRD) patterns were indexed to show that the KMgF3 crystal system was unchanged. The fluorescent spectra of KMgF3: Ce, Yb polycrystal powders were studied and compared with those of the Ce,Yb doped KMgF3 crystals produced using the high-temperature solid phase method. The diffuse reflection spectra and infrared emission of KMgF3: Ce, Yb were investigated. From the results, the authors could confirm that there were charge transfer processes from Ce^3+ to Yb^3+ in both KMgF3: Ce,Yb nanocrystals and polycrystal powders.
Nanocrystals of KMgF3 single-doped and codoped with Ce^3+ or/and Yb^3+ were synthesized separately by the mi-croemulsion method. The X-ray diffraction(XRD) patterns were indexed to show that the KMgF3 crystal system was unchanged. The fluorescent spectra of KMgF3: Ce, Yb polycrystal powders were studied and compared with those of the Ce,Yb doped KMgF3 crystals produced using the high-temperature solid phase method. The diffuse reflection spectra and infrared emission of KMgF3: Ce, Yb were investigated. From the results, the authors could confirm that there were charge transfer processes from Ce^3+ to Yb^3+ in both KMgF3: Ce,Yb nanocrystals and polycrystal powders.
基金
Supported by the Science Foundation of Changchun City of China(No.2005093)
the Science and Technology Departmentof Jilin Province,P.R.China(No.20050507).