کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1812086 | 1025607 | 2011 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Temperature dependence of photoluminescence and magnetic properties in Yb3+-doped ZnS nanocrystals Temperature dependence of photoluminescence and magnetic properties in Yb3+-doped ZnS nanocrystals](/preview/png/1812086.png)
Zinc sulfide semiconductor nanocrystals doped with Yb3+ ions have been prepared through a chemical precipitation method using PVP (polyvinylpyrrolidone) as a capping agent. The structure of the nanoparticles has been analyzed by X-ray diffraction (XRD). The average size of the nanoparticles is found to be 3.7±0.4 nm. Photoluminescence spectra were recorded for doped ZnS nanoparticles as a function of temperature between 9 and 300 K. The results suggest that two emission bands have been observed at different temperatures. The width of 1.269 eV peak increases as temperature is raised. A shift of lower energy emission band has been observed with the change of temperature. Moreover, the magnetic measurement showed that the sample exhibits paramagnetic behavior.
Journal: Physica B: Condensed Matter - Volume 406, Issue 17, 1 September 2011, Pages 3318–3321