Abstract
Yb3+/Nd3+ singly and co-doped Na2GdMg2V3O12 phosphors with near-infrared (NIR) emission were synthesized via sol-gel method. The phase purity and structure of samples were characterized by X-ray diffraction (XRD), the photoluminescence emission (PL) and excitation (PLE) spectra along with decay curves were also measured. Near infrared (NIR) emissions (850–1150 nm) from acceptors Yb3+ or Nd3+ matching well with the response curve of the silicon solar cell were obtained, in which VO4 3− groups acted as sensitizers by capturing near ultraviolet photons which are not absorbed efficiently by silicon solar cell and transferred them to Yb3+/Nd3+ by energy transfer processes. The NIR emission intensities of the Nd3+-Yb3+co-doped samples Na2GdMg2V3O12 were enhanced greatly in comparison with that of Nd3+/Yb3+ singly doped samples, and the possible energy transfer processes were also discussed in detail. Results indicate that the obtained samples are potential solar spectral down-conversion (DC) convertors to enhance the conversion efficiency of the silicon solar cells.
Original language | English |
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Pages (from-to) | 12988-12994 |
Number of pages | 7 |
Journal | Ceramics International |
Volume | 42 |
Issue number | 11 |
DOIs | |
Publication status | Published - 15 Aug 2016 |
Keywords
- Energy transfer
- Near-infrared
- Phosphor
- Vanadate garnet