Strzep Adam, Watras Adam, Zawisza Katarzyna, Boutinaud Philippe, Wiglusz Rafal J
Institute of Low Temperature and Structure Research, Polish Academy of Sciences , P.O. Box 1410, 50-950 Wroclaw 2, Poland.
Université Clermont Auvergne , SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France.
Inorg Chem. 2017 Sep 18;56(18):10914-10925. doi: 10.1021/acs.inorgchem.7b01089. Epub 2017 Aug 28.
In the present work, a precipitation method was employed to prepare nanosized YAsO doped with Eu ions. The raw nanomaterials have been thermally treated in a temperature range between 500 and 900 °C for 3 h. The XRD analysis demonstrated that the powders were single-phase nanopowders with high crystallite dispersion. Our studies were focused on relating the luminescence properties of the Eu dopant to the nanocrystallite (NC) size. The average NC size varied accordingly between 15 and 45 nm. We have found that the size effect is manifested mainly in the expansion of the cell volume and broadening of XRD peaks, as indicated by Rietveld analysis. Moreover, the emission and excitation spectra, although typical for Eu ions, demonstrated some degree of variability with calcination temperatures and doping concentration. To explain these differences, a detailed analysis of luminescence spectra by the Judd-Ofelt theory has been performed.
在本工作中，采用沉淀法制备了掺杂铕离子的纳米尺寸YAsO。对原始纳米材料在500至900°C的温度范围内进行了3小时的热处理。X射线衍射（XRD）分析表明，这些粉末是具有高微晶分散度的单相纳米粉末。我们的研究重点是将铕掺杂剂的发光特性与纳米微晶（NC）尺寸相关联。平均NC尺寸相应地在15至45纳米之间变化。我们发现，如里特韦尔德分析所示，尺寸效应主要体现在晶胞体积的扩大和XRD峰的变宽上。此外，发射光谱和激发光谱虽然是铕离子的典型光谱，但随着煅烧温度和掺杂浓度的变化呈现出一定程度的差异。为了解释这些差异，已通过贾德 - 奥费尔特理论对发光光谱进行了详细分析。
