Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
78825 | Solar Energy Materials and Solar Cells | 2011 | 4 Pages |
Near-infrared (NIR) downconversion (DC) has been observed in a Dy3+-doped GdVO4 phosphor, where one ultraviolet-blue photon can be split efficiently into two NIR photons. Underlying mechanism for the process of NIR-DC is analyzed in terms of absorption spectrum, static and dynamic photoemission and monitored excitation spectra. Internal quantum efficiency is obtained up to 111% on the basis of experimental and theoretical calculation results. This enables the phosphor promising in significant enhancement of spectral response of silicon solar cells, particularly in the range of 200–500 nm.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Efficient near-infrared downconversion, involving the conversion of a UV-blue photon into two near-infrared photons, has been observed in GdVO4:Dy3+ phosphors. ► Internal quantum efficiency of the phosphors has been obtained up to 111% on the basis of the Judd–Ofelt theory and experimental lifetime. ► The phosphor might be promising in significant enhancement of spectral response of photovoltaic cells.