کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1675624 | 1008982 | 2006 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Studies on blue and red photoluminescence from Al2O3:Ce3+:Mn2+coatings synthesized by spray pyrolysis technique Studies on blue and red photoluminescence from Al2O3:Ce3+:Mn2+coatings synthesized by spray pyrolysis technique](/preview/png/1675624.png)
Al2O3:Ce3+:Mn2+ films deposited by the spray pyrolysis technique show blue and red emissions under ultraviolet light excitation. The blue emission is due to the de-excitation of Ce3+ ions from their excited state 5d to the split ground state 2F. The usually weak red emission attributed to 3d→3d de-excitation of Mn2+ is enhanced through an efficient energy transfer from Ce3+ to Mn2+ ions. The quantum efficiency of this transfer is near to 100%. SEM and RBS have been used to analyze the surface morphology and chemical composition of Ce- and Mn-doped Al2O3 films. The films were also characterized by the X-ray photoelectron spectroscopy technique, and it was found that a considerable amount of Mn ions remains linked to chlorine while Ce is mostly in an oxidized state.
Journal: Thin Solid Films - Volume 515, Issue 2, 25 October 2006, Pages 607–610