Pyrolytic synthesis and Eu3+→Eu2+ reduction process of blue-emitting perovskite-type BaLiF3:Eu thin films

Reduction of Eu2+-activated nanoparticles by unique TCRA treatment

“…According to Blasse [15] concerned with energy transfer, the critical distance between activating ions can be estimated using the cation number in the unit cell, unit cell volume and the critical concentration. Taking the 0.02 (2 mol%) for the present doped Eu 2+ ion, the critical distance calculated as 16Å, and this value is close to 16 and 18Å of other Eu 2+ ion-doped luminescent materials: BaLiF 3 [4] and SrAl 2 O 4 [16], respectively.…”

“…A number of researches have been reported to focus on the synthetic methods and characterizations of rare earth fluoride and rare earth doped alkaline-earth fluoride using the HF [1], trifluoro-acetates [2][3][4][5] and 1,1,1-trifluoro-5-methyl-2,4-hexanedione [6]. Above all, the luminescent [7,8], scintillation properties [9,10] and applications to the solar cell [11] have been studied for Eu doped CaF 2 single crystal.…”

EPR Investigation on a Quantitative Analysis of Eu(II) and Eu(III) in LiCl/KCl Eutectic Molten Salt

“…3 The Eu(III) ion, which was added as an initial material, was spontaneously reduced to Eu(II) to some extent. 10,11 It is well-known that Eu(III) is chemically reduced in a molten salt media according to the following reaction: 12,13 2 EuCl 3 ↔ 2 EuCl 2 + Cl 2 However, quantitative information on this reduction has not been reported yet. The EPR technique established in this work was applied to evaluate the thermodynamics for reduction of Eu(III) in a LiCl-KCl eutectic melt at 723 K. On the contrary that the Eu(III) ion added as a initial material was spontaneously reduced to Eu(II) to some extent, an oxidation of Eu(II) was not observed when Eu(II) was added into a LiCl-KCl eutectic molten salt at 723 K as an initial material.…”

Chemical processing for inorganic fluoride and oxyfluoride materials having optical functions

“…Perovskite-type BaLiF 3 can be synthesized in a similar way [28]. The reaction temperature of 600 8C necessary for producing a single-phase BaLiF 3 is lower than that for a conventional solid- state reaction or a melting method.…”