Abstract

To reduce energy losses by thermalization of charge carriers in a silicon solar cell, quantum-cutting luminescent materials are desired for the efficient downconversion of UV-visible radiation into near-IR radiation. In this Letter, quantum cutting involving emission of two near-IR photons for each UV-blue photon absorbed is demonstrated in Nd3+/Yb3+:β-YF3 nanocrystals embedded in transparent bulk-glass ceramics. Upon excitation of an Nd3+ ion with a UV-blue photon, Yb3+ ions emit two near-IR photons through an efficient two-step energy transfer from Nd3+ to Yb3+ with Nd3+:4F3/2 acting as the intermediate state.

© 2010 Optical Society of America

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