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LaPO_4: Er microspheres with high NIR luminescent quantum yield

机译:LaPO_4:具有高NIR发光量子产率的Er微球

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摘要

Er-doped LaPO_4 microspheres have been synthesized by spray pyrolysis and the near infrared (NIR) properties have been characterized. It has been found that, following an adequate post-annealing treatment, the emission properties are remarkably improved. The NIR luminescence intensity is highly enhanced and its decay time increases to a value almost coincident with the reported radiative lifetime, which implies that the quantum yield approaches η ≈ 100%. This improvement in luminescence characteristics is probably related to the suppression of residual OH~- radicals, that otherwise act as NIR luminescence quenchers, and to the increase in material's crystallinity.
机译:通过喷雾热解合成了掺Er的LaPO_4微球,并表征了近红外(NIR)性能。已经发现,在充分的退火后处理之后,发射性能显着改善。 NIR发光强度大大提高,其衰减时间增加到几乎与报道的辐射寿命一致的值,这意味着量子产率接近η≈100%。发光特性的这种改善可能与抑制残留的OH_-自由基有关,后者可作为NIR发光猝灭剂,并与材料的结晶度提高有关。

著录项

  • 来源
    《Materials Chemistry and Physics》 |2013年第3期|666-671|共6页
  • 作者单位

    Departamento de Fisica de Materiales, C-04, Facultad de Ciencias, Universidad Autonoma de Madrid, Avda. Francisco Tomds y Valiente 7, 28049 Madrid, Spain;

    Departamento de Fisica de Materiales, C-04, Facultad de Ciencias, Universidad Autonoma de Madrid, Avda. Francisco Tomds y Valiente 7, 28049 Madrid, Spain;

    Instituto de Ciencia de Materiales de Sevilla, CSIC-US, c/Americo Vespucio 49, Isla de la Cartuja, 41092 Sevilla, Spain;

    Instituto de Ciencia de Materiales de Sevilla, CSIC-US, c/Americo Vespucio 49, Isla de la Cartuja, 41092 Sevilla, Spain;

    Departamento de Fisica de Materiales, C-04, Facultad de Ciencias, Universidad Autonoma de Madrid, Avda. Francisco Tomds y Valiente 7, 28049 Madrid, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nanostructures; Chemical synthesis; Photoluminescence spectroscopy; Optical properties; Electron microscopy (STEM, TEM and SEM); Thermogravimetric analysis (TGA);

    机译:纳米结构;化学合成;光致发光光谱法;光学性质;电子显微镜(STEM;TEM和SEM);热重分析(TGA);

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