Abstract
Quantum cutting downconversion involving the emission of two near-infrared photons for each blue photon absorbed is realized in transparent glass ceramics with embedded : nanocrystals. On excitation of ions with a visible photon at , ions emit two near-infrared photons at through an efficient cooperative energy transfer from to , 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.
© 2008 Optical Society of America
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