Journal
OPTICS LETTERS
Volume 33, Issue 16, Pages 1884-1886Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.33.001884
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Funding
- Natural Science Foundation of China [50672098]
- Science and Technology Project of Fujian [2007HZ0002-2]
- NERCOCM [2005DC105003]
- SKLSC [20080039]
- FJIRSM [SZD07004]
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Quantum cutting downconversion involving the emission of two near-infrared photons for each blue photon absorbed is realized in transparent glass ceramics with embedded Pr3+/Yb3+: beta-YF3 nanocrystals. On excitation of Pr3+ ions with a visible photon at 482 nm, Yb3+ ions emit two near-infrared photons at 976 nm through an efficient cooperative energy transfer from Pr3+ to Yb3+, with optimal quantum efficiency close to 200%. The development of the near-infrared quantum cutting transparent glass ceramic could open a route to enhance the energy efficiency of the silicon solar cell by converting one blue solar photon to two near-infrared ones. (C) 2008 Optical Society of America.
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