ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 43, Number 6
JKCSEZ 43(6)
December 20, 1999 

Green-emission intensity of a Zn2-xMnxSi04 phosphor, which is a potential candidate as a green component in PDP device, significantly increases provided that the compound is additionally heat treated at 900℃ after solid state reaction at 1300℃, In order to verify origin of such an intensity enhancement after the additional heat treatment in association with the electronic and local structural change at around Mn ions, the Mn K-edge X-ray absorption spectra were recorded. From the analyses of the preedge peak corresponding to 1s →3d bound state transition and XANES spectrum, it is known that most Mn ions are in +2 oxidation state and substitute Zn ion site regardless of the thermal treatment, In addition, EXAFS analyses revealed that Mn ions formed Mn04 tetrahedral with the Mn-O bond length shortened by 0.01Å and with reduced Debye-Wailer factor in the thermally treated sample.