Quantum cutting downconversion in Tb~(3+),Yb~(3+) codoped Sr_3AIO_4F phosphor

摘要

A near Infrared (NIR) quantum culling (QC) Sr_3A10_4F:Tb~(3+),Yb~(3+) 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 Tb~(3+) have been measured to prove energy transfer (ET) from Tb~(3+) to Yb~(3+). Quantum efficiency (QE) related to Yb~(3+) concentration was calculated and the highest QE was found to be 135% hen Yb~(3+) doped concentration at 20%. The present Tb~(3+) and Yb~(3+) co-doped Sr_3AlO_4F phosphor may be a promising candidate to modify the spectral of the solar light.