【摘 要】
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The luminescent properties of Gd3PO7:Eu were investigated in UV and VUV regions. This phosphor has such strong emissions around 618.5 nm under UV excitation, es
【机 构】
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Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry Chinese Aca
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The luminescent properties of Gd3PO7:Eu were investigated in UV and VUV regions. This phosphor has such strong emissions around 618.5 nm under UV excitation, especially around 209nm, that it has a better colour saturation than that of Y2O3:Eu. It could be a new potential red phosphor for lamp and other applications with UV-excitation source or even for displaying devices. In the VUV excitation spectrum of Eu3+ emissions, energy absorptions by Gd3+, Gd-O and PO34- have been observed, on which it can be inferred that there are three kinds of energy transferring processes to Eu3+ ions. The energy absorptions of Gd3+, Gd-O and PO34- are induced by 4 f → 4 f transitions, a bandgap transition of Gd3PO7 and intramolecular (2t2 → 2a, 3t2) transition, respectively.The energy transfer efficiency of the PO34- intramolecular transition is lower compared with that of the bandgap transition (Gd-O).
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