Zhang Gangyi, Qiang Qinping, Du Shanshan, Wang Yuhua
Department of Materials Science, School of Physical Science and Technology, Lanzhou University Lanzhou 730000 PR China
Key Laboratory for Special Function Materials and Structural Design of the Ministry of Education, Lanzhou University Lanzhou 730000 China.
RSC Adv. 2018 Mar 5;8(17):9512-9518. doi: 10.1039/c7ra13759a. eCollection 2018 Feb 28.
GdSrAlO:Yb/Er micro-particles were synthesized by a simple solid state method. The structure, morphology, size and upconversion luminescence features have been characterized. These results indicated that GdSrAlO has a contracted tetragonal cell and has irregular block shaped particles with sizes of about 5 μm. During upconversion, green (H, S → I) (527 nm, 549 nm) and red (F → I) (665 nm) emissions had been observed, both of which occurred a two-photon population process. In addition, green UC emission characteristics were studied, and it was found that its temperature ranged from 293 K to 473 K and the sensitivity was 0.0054 K at 473 K. This indicated that GdSrAlO:Yb/Er micro-particles may have potential application in high temperature environments for safety signs.
采用简单的固相法合成了GdSrAlO:Yb/Er微粒。对其结构、形貌、尺寸和上转换发光特性进行了表征。结果表明，GdSrAlO具有收缩的四方晶胞，颗粒呈不规则块状，尺寸约为5μm。在上转换过程中，观察到绿色（H，S→I）（527nm，549nm）和红色（F→I）（665nm）发射，两者均发生双光子布居过程。此外，研究了绿色上转换发光特性，发现其温度范围为293K至473K，在473K时灵敏度为0.0054K。这表明GdSrAlO:Yb/Er微粒在高温环境下用于安全标志可能具有潜在应用。
