Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1808767 | Physica B: Condensed Matter | 2015 | 4 Pages |
Abstract
Host sensitized near-infrared emitting phosphor Na2YMg2(VO4)3:Yb3+ was fabricated by a sol-gel method. Efficient broad emission is observed under ultraviolet excitation ranging from 240Â nm to â400Â nm and this luminescence originates from ligand-metal charge transfer of 2p of O2â to 3d of V5+. Under excitation of ultraviolet light in the broad absorption band, intense near-infrared emission of Yb3+ around 974Â nm is observed for Yb3+-doped Na2YMg2(VO4)3. Through study of photoluminescence spectra, fluorescence decay curves and concentration-dependent luminescence, mechanism of energy transfer from VO4 group to Yb3+ was proposed to rationalize the downconversion process. This phosphor with performance of ultra-violet to near-infrared downconversion could have potential application in improving efficiency of silicon-based solar cell.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Yong Li, Xiantao Wei, Hongmei Chen, Yan Pan, Yuexia Ji,