کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5402454 | 1392734 | 2010 | 6 صفحه PDF | دانلود رایگان |
We investigated the optical properties of a Cr2+:ZnSe film deposited by radiofrequency magnetron co-sputtering and compared them with those of a single crystal. The mid-infrared room temperature photoluminescence spectra under direct (1850Â nm) and indirect (458Â nm) excitation revealed that chromium has been incorporated in the Cr2+ active state. The difference of Cr2+ fluorescence lifetime values (measured between 10 and 400Â K) between both samples was attributed to the presence in the film of firstly a large amount of chromium in a valence state different from the Cr2+ active state and secondly structural defects in the ZnSe host matrix. Visible photoluminescence measurements were carried out in order to identify these structural defects.
Journal: Journal of Luminescence - Volume 130, Issue 8, August 2010, Pages 1449-1454