کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1489730 | 992311 | 2011 | 4 صفحه PDF | دانلود رایگان |
Yb3+/Er3+ codoped Ca0.65La0.35F2.35 materials with intense red emission via upconversion were prepared by a high temperature solid-state method. Based on the upconversion luminescence properties investigations, it was found that, under 980 nm excitation, Ca0.65La0.35F2.35:20 mol.%Yb3+, xEr3+ showed intense red upconversion luminescence, which was ascribed to 4F9/2 → 4I15/2 transition of Er3+, although both green and red emissions could be detected. It was also found that the green and red emissions originated the two photon processes, and the ground-state absorption (GSA), excited-state absorption (ESA) and energy transfer (ET) processes between Er3+/Yb3+ ions and Er3+/Er3 ions were involved in the enhanced red emission mechanism.
Under 980 nm excitation, Ca0.65La0.35F2.35:20 mol.%Yb3+, xEr3+ showed intense red upconversion luminescence, which was ascribed to 4F9/2 → 4I15/2 transition of Er3+. The ground-state absorption (GSA), excited-state absorption (ESA) and energy transfer (ET) processes between Er3+/Yb3+ ions and Er3+/Er3 ions were involved in the enhanced red emission mechanism. .Figure optionsDownload as PowerPoint slideResearch highlights▶ Yb3+/Er3+ codoped Ca0.65La0.35F2.35 materials with intense red emission via upconversion were prepared by a high temperature solid-state method. ▶ Ca0.65La0.35F2.35:20 mol.%Yb3+, xEr3+ showed intense red upconversion luminescence, which was ascribed to 4F9/2 → 4I15/2 transition of Er3+. ▶ The green and red emissions are two-photon processes, while both energy transfers between Yb3+/Er3+ and Er3+/Er3+ are involved in the red emission mechanism of the Ca0.65La0.35F2.35:20 mol.%Yb3+, xEr3+ materials.
Journal: Materials Research Bulletin - Volume 46, Issue 4, April 2011, Pages 543–546