Abstract
AbstractFacile and effective synthesis strategy is dramatically desirable for basic studies and practical applications of Eu2+ luminescent materials. In this work, facile chemical lithiation is used for reduction of trivalent Eu3+ ions into divalent Eu2+ ions in Eu1/3Zr2(PO4)3 crystal structure using nBu‐Li solution at room temperature. VUV/Vis luminescence properties, X‐ray absorption near edge structure (XANES), and magnetic properties were used to characterize the valence state of Eu ions in crystal structure of host lattice. The emission light color changes from orange‐red [Eu1/3Zr2(PO4)3] to blue‐green [LixEuIIxEuIII1/3–xZr2(PO4)3], and the samples are paramagnetic after this facile chemical lithiation. The ultra‐fast decay time (<50 ns) of Li0.286EuII0.286EuIII0.047Zr2(PO4)3 is attributed to the luminescence quenching effects of Eu3+ and Eu2+ co‐existing in the crystal structure. All the results indicate that this chemical lithiation method is a facile and effective method for Eu2+ luminescent materials fabrication and LixEuIIxEuIII1/3–xZr2(PO4)3 is a potential luminescent material.
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