Quantum Cutting Downconversion in Tb3+,Yb3+ Codoped Sr3AlO4F Phosphor

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A near Infrared (NIR) quantum cutting (QC) Sr3AlO4F:Tb3+,Yb3+ phosphor was synthesized by the conventional high temperature solid-state reaction. The luminescence spectra both in visible (VIS) and NIR regions and decay lifetime curves of Tb3+ have been measured to prove energy transfer (ET) from Tb3+ to Yb3+. Quantum efficiency (QE) related to Yb3+ concentration was calculated and the highest QE was found to be 135% hen Yb3+ doped concentration at 20%. The present Tb3+ and Yb3+ co-doped Sr3AlO4F phosphor may be a promising candidate to modify the spectral of the solar light.

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172-175

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April 2013

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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