کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
236368 | 465668 | 2013 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Influence of TTAB on morphology and photoluminescence of GdVO4:Eu3 + powders in a wide pH range Influence of TTAB on morphology and photoluminescence of GdVO4:Eu3 + powders in a wide pH range](/preview/png/236368.png)
We demonstrate that the critical issue of controllable growth of GdVO4:Eu3 + crystal particles is solved by “tetradecyltrimethyl ammonium bromide (TTAB)” in a variable pH range. The microstructure, morphology, and luminescence property of the phosphors were investigated by X-ray powder diffraction (XRD), scanning electronic microscopy (SEM), transmission electron microscopy (TEM), and photoluminescence spectroscopy (PL). The results suggested that the surfactant TTAB was a key factor for determining the morphology of final GdVO4:Eu3 + crystals. The influence of pH on the nucleation rate was studied as well. The PL results indicated that the PL property of the GdVO4:Eu3 + phosphors was crucially impacted by the micro-structure and morphology. All the phosphors mainly showed strong red emissions at 615 and 618 nm originating from the hypersensitive transition 5D0 → 7F2 of Eu3 + ions. The nano-sized phosphors showed prominent PL properties due to the grain size effect. The crystalline state and the microstructure of the products also affected the PL performance.
Figure optionsDownload as PowerPoint slide
Journal: Powder Technology - Volume 249, November 2013, Pages 475–481