Abstract Europium doped Y2O3spherical nanoparticles with the diameter ~10 nmobtained via cw laser vaporization are shown to crystallize in monoclinic symmetry class (C2/m space group). The size of nanoparticles established via HRTEM coincides with coherent scattering region established by XRD. Luminescence spectrum in the vicinity of ultranarrow transition demonstrates three peaks consistent with three inequivalent positions of Eu3+ ion in monoclinic Y2O3 lattice. Hypersensitive transition dominates in the spectrum, admitting the lack of inversion symmetry at Cs sites occupied by Eu3+. The spectrum of hypersensitive transition is expanded to the red part of spectrum due intense transitions terminating at higher-lying components of crystal-field-split 7F2 energy level. Obtaining chromaticity coordinates (0.669, 0.331)and absolute quantum yield (~21%) is possible using red phosphor based on monoclinic Y2O3:Eu3+.

中文翻译：

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通过激光汽化产生的单斜 Y2O3:Eu 纳米磷光体的发光

摘要 通过连续激光汽化获得的直径~10 nm 的铕掺杂 Y2O3 球形纳米粒子显示为单斜对称类（C2/m 空间群）结晶。通过 HRTEM 建立的纳米粒子的尺寸与通过 XRD 建立的相干散射区域一致。超窄跃迁附近的发光光谱表明三个峰与 Eu3+ 离子在单斜 Y2O3 晶格中的三个不等价位置一致。超敏感跃迁在光谱中占主导地位，承认在 Eu3+ 占据的 Cs 位点缺乏反演对称性。由于强烈跃迁终止于晶体场分裂 7F2 能级的较高成分，因此超敏跃迁的光谱扩展到光谱的红色部分。获取色度坐标 (0.669, 0.