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Spectral modifications from visible sunlight to near-infrared emission have been studied extensively to improve the conversion efficiency of crystalline silicon solar cell [1, 2].In this study, transparent glass ceramic (GC) containing Ce3+-Yb3+codoped Y3Al5O12 nanocrystals was prepared.Efficient energy transfer from Ce3+ ions to Yb3+ ions was confirmed by the luminescence spectrum and fluorescent lifetime measurements; the mechanism was investigated and demonstrated to be a single-photon process rather than a two-photon process.Greatly enhanced near-infrared emission was achieved from the GC excited by the simulated sunlight from 400 to 800 nm compared with that from as-prepared glass.These results demonstrate that the GCs may have potential applications as spectral convertors to enhance the photoelectric conversion efficiency of c-Si solar cells.