Abstract

Yb3+-doped glass and glass ceramic containing ZnO nanocrystals were prepared by the melting–quenching method and subsequent heat treatment. Intense near-IR emission around 1000nm that originated from the transition of Yb3+:F5/22F7/22 was generated as a result of energy transfer from oxygen interstitials in ZnO nanocrystals to Yb3+ with energy transfer efficiency of about 10%. The quantum yield for the near-IR emission of Yb3+ under the excitation of 390nm was about 16.7%. These materials have potential application in achieving high-efficiency Si solar cells via spectrum modification.

© 2011 Optical Society of America

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