科研之友
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摘要
BaGd2ZnO5: Dy3+, Yb3+ was successfully synthesized by the sol-gel method. The crystal structure and morphology of the samples were characterized by X-ray powder diffraction (XRD) and scanning electron microscope. Under 3 W 971 nm near-infrared laser excitation, the near-infrared emission of phosphors was intense. The dependence of the up-conversion emission intensities of the phosphors on the working power of laser diode was obtained as an evidence for the energy transfer from Yb3+ to Dy3+. In comparison, under excitation of 354 nm light, the near-infrared quantum cutting for the BaGd2ZnO5: Dy3+, Yb3+ samples is proved by the emission spectra. The corresponding quantum cutting mechanisms are discussed through the energy level. The maximum quantum efficiency calculated approaches 158.0%. This study has the prospect to be applied in silicon-based solar cells to promote the conversion efficiency.
- 出版日期2014-2
- 单位河北大学
