کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1495473 | 992936 | 2012 | 5 صفحه PDF | دانلود رایگان |
Nanostructured undoped and samarium doped ceria thin nanocolumnar films are electrodeposited onto (FTO) glass substrates at low-temperature (30 °C) with a subsequent thermal annealing at 600 °C for 1 h. Films are obtained from mixed Sm3+/Ce3+ aqueous nitrate solutions, applying a −0.8 V/(SCE) potential for 1 h. Cubic fluorite type ceria nanostructured films of high crystal quality are synthesized as confirmed by X-ray diffraction and Raman spectroscopy. SEM analysis demonstrates that doping with Sm improves the quality of the film with respect to crack formation. The incorporation and activation of the Sm3+ ions in the ceria host as well as the Stark splitting of the manifolds responsible for emission in the red-orange spectral range are investigated by means of photoluminescence spectroscopy.
► Nanostructured undoped and Sm doped ceria thin films are grown on FTO glass substrates by electrodeposition.
► Doping with Sm improves the quality of the film with respect to crack formation.
► Analysis of luminescence spectrum is indicative of a predominant incorporation of the Sm ions into the Ce sites.
► Stark splitting analysis suggests that some samarium ions are situated in non-equivalent crystallographic sites.
Journal: Optical Materials - Volume 34, Issue 11, September 2012, Pages 1897–1901