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 Pr3+Yb3+: β-YF3 nanocrystals. On excitation of Pr3+ ions with a visible photon at 482nm, Yb3+ ions emit two near-infrared photons at 976nm 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.

© 2008 Optical Society of America

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