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      Visible quantum cutting in GdF3:Eu(3+) nanocrystals via downconversion.

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          Abstract

          GdF3:Eu(3+) nanocrystals (NCs) and nanorods were synthesized by a microemulsion-mediated hydrothermal process. The structure, shape and particle size were characterized by means of x-ray diffraction (XRD) and transmission electron microscopy (TEM). The vacuum ultraviolet (VUV) spectrum of GdF3:Eu(3+) NCs shows that the Gd(3+) ion can absorb one VUV photon excited in the (6)GJ levels and relaxes through two-step energy transfer to Eu(3+), yielding two visible photons at room temperature. The visible quantum efficiency of GdF3:Eu(3+) NCs was calculated to be close to 170% by the peak intensity ratio of correlative transition emission under VUV excitation at 160 nm.

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          Author and article information

          Affiliations
          [1 ] College of Life Science, Dalian Nationalities University, Dalian 116600, People's Republic of China.
          Journal
          Nanotechnology
          Nanotechnology
          IOP Publishing
          0957-4484
          0957-4484
          Mar 28 2006
          : 17
          : 6
          S0957-4484(06)11233-7
          10.1088/0957-4484/17/6/017
          26558571

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