Yang C.-Y.Som S.Das S.Lu C.-H.2019-05-132019-05-13201709574522https://scholars.lib.ntu.edu.tw/handle/123456789/407348The photoluminescence and cathodoluminescence properties of new silicate oxyapatite phosphors ZnGd4Si3O13: Tb3+, Mn2+ were investigated in this study. The Rietveld refinement indicated that the prepared phosphors exhibited a hexagonal structure with space group P63/m (no. 176). Under UV excitation, ZnGd4Si3O13: Mn2+ phosphors presented a red emission band due to the T1(4G)¡V6A1(6S) transition of Mn2+ ions, while ZnGd4Si3O13: Tb3+ showed several emission lines at 490, 544, 585 and 621?nm attributed to the 5D4¡÷7FJ (J = 6, 5, 4, 3) transitions of Tb3+ ions. The co-doping of Tb3+ ions into ZnGd4Si3O13: Mn2+ resulted in a 100% enhancement of the photoluminescence intensity for Mn2+ ions through a dipole¡Vdipole energy transfer mechanism. On the other hand, the energy transfer process from the sensitizers (Tb3+) to the activators (Mn2+) led to a decrease in Tb3+ emission as co-doping Mn2+ ions into ZnGd4Si3O13: Tb3+. Increasing the concentration of Mn2+ ions from x = 0.02 to x = 0.08 for Zn2?xMnxGd3TbSi3O13 efficiently enhanced the energy transfer efficiency from 90 to 98%. Under the electron-beam excitation, the emission spectra of phosphors were similar to those observed under UV excitation. However, a deviation of CIE coordinates was found under the electron-beam excitation due to the relatively unapparent energy transfer between Tb3+ and Mn2+ ions. The present results suggested a new series of color-tunable phosphors which can be used for both photoluminescence and cathodoluminescence applications. ? 2017, Springer Science+Business Media New York.[SDGs]SDG7journal article10.1007/s10854-017-6651-x2-s2.0-85015240214https://www.scopus.com/inward/record.uri?eid=2-s2.0-85015240214&doi=10.1007%2fs10854-017-6651-x&partnerID=40&md5=0767d02d050c71c81d524c731458b12c