Abstract
AbstractSteady‐state and time‐resolved emission and excitation spectra and luminescence decay kinetics were studied at 4.2‐350 K under excitation in the 2.5‐15 eV energy range for the undoped and Ce3+‐doped Lu3Al5O12 (LuAG) single crystalline films grown by Liquid Phase Epitaxy method. The spectral bands arising from the single Pb2+‐based centers were identified. Competition between Pb2+ and Ce3+ ions in the processes of energy transfer from the LuAG crystal lattice was evidenced. Due to overlap of the 3.61 eV emission band of Pb2+ centers with the 3.6 eV absorption band of Ce3+ centers, an effective energy transfer from Pb2+ ions to Ce3+ ions occurs, resulting in the appearance of slower component in the luminescence decay kinetics of Ce3+ centers and decrease of the Ce3+‐related luminescence intensity. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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