簡単な溶液プロセスにより合成したCe^<3+>ドープMIIIMVO_4(MIII:La,Y;MV:V,P)ナノ結晶のフォトルミネッセンス特性(<特集>水溶液科学に立脚したセラミックス合成プロセス)

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Nanometer-sized M^<III>M^VO_4 (M^<III>:La, Y; M^V:V, P) particles doped with Ce^<3+> ions were prepared from alkaline alcohol-water mixture with M^<III> (NO_3)_3, CeCl_3 and H_3PO_4 (or NH_4VO_4) under reflux (355K). The maximum peak position of photoluminescent emissions for M^<III>M^VO_4:Ce particles centered around 350-450nm were strongly affected by host anions (PO_4^<3->, VO_4^<3->) in contrast to host cations (La^<3+>, Y^<3+>). The maximum external quantum efficiency in this work was 18.3% for LaPO_4 nanocrystals doped with 0.5mol% of Ce^<3+> ions, whereas those of M^<III>VO_4:Ce were extremely low since most of Ce^<3+> ions added in the ethanol-water mixture were oxidized to Ce^<4+> ions under reflux.
社団法人日本セラミックス協会の論文
2007-12-01