The luminescent materials SrB4O7: Eu and BaB8O13: Eu were synthesized, and the valence states of europium in the materials were measured by means of XANES at Eu-L3 edge. It is found that the Eu3+ and Eu2+ ions are all...The luminescent materials SrB4O7: Eu and BaB8O13: Eu were synthesized, and the valence states of europium in the materials were measured by means of XANES at Eu-L3 edge. It is found that the Eu3+ and Eu2+ ions are all present in the materials, and more Eu3+ ions can be reduced in SrB4O7: Eu than in BaB8O13:Eu. The excitation and emission spectra of Eu3+ in SrB4O7: Eu and BaB8O13:Eu were determined.展开更多
基金Project supported by the State Key Project of Basic Research (Project 973) (No. G1998061312), the National Natural Science Foundation of China (No. 29771029) and the Foundation of Laboratory of Beijing Synchrontron Radiation, Institute of High Energy Phy
文摘The luminescent materials SrB4O7: Eu and BaB8O13: Eu were synthesized, and the valence states of europium in the materials were measured by means of XANES at Eu-L3 edge. It is found that the Eu3+ and Eu2+ ions are all present in the materials, and more Eu3+ ions can be reduced in SrB4O7: Eu than in BaB8O13:Eu. The excitation and emission spectra of Eu3+ in SrB4O7: Eu and BaB8O13:Eu were determined.
