Facile Microwave-Assisted Synthesis of Lanthanide Doped CaTiO3 Nanocrystals

Journal of the Brazilian Chemical Society

Sandra C. Pereira¹  Alberthmeiry T. Figueiredo¹  Cristiano M. Barrado¹  Marcelo H. Stoppa¹  Yashashchandra Dwivedi¹  Maximo S. Li¹  Elson Longo¹ 

关键词: luminescence;    spectroscopy;    lanthanide elements;    defect emissions;    nanophosphors;   

DOI  :  10.5935/0103-5053.20150229

来源: SciELO

【 摘 要 】

This article discusses a simple approach for the microwave-assisted synthesis of good quality nanosized calcium titanate crystals doped with trivalent Tm and Yb lanthanide ions. The prepared nanoparticles had a microcube-like structure and a crystallite size of ca. 47 nm. The structure of the nanocrystals was analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and their spectroscopic behavior was examined at a laser excitation wavelength of 350.7 nm. It was found that doping CaTiO3 nanocrystals with Yb and Tm leads to about 250-fold brighter photoluminescence (PL) emissions in the blue and near-infrared regions than that emitted by pure CaTiO3 nanocrystals. The PL emission was correlated with the structural disorder.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License