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Ce3+, Yb3+ co-doped Y3Al5O12 iflms were prepared by pulse laser deposition. X-ray diffraction, X-ray photoelectron spectroscopy, photoluminescence spectra were used to characterize their structural and luminescent properties. Near-infrared quantum cutting from the iflms was observed via a cooperative energy transfer from Ce3+ to Yb3+ ions. The high quantum efficiency of the films implies that Ce3+,Yb3+ co-doped Y3Al5O12 iflms have potential application by tuning the solar spectrum to enhance the efifciency of silicon solar cells.

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