Scintillator- Oriented Investigation of Y3Al5O12:Ce, Tb Powders

摘要

The spectral and kinetic characteristics of YAG: Ce, Tb powders (with Tb3+ concentration varying up to 100%, relative to Y) using cathode-ray and UV excitations were determined. The energy diagram of YAG: Ce, Tb was constructed and energy transfer processes in the compound were studied. The most effective resonance energy transfer takes place at Tb3+ concentrations of 20%. There is no evidence of Ce3+. Tb3+ energy back transfer for (Y, Tb) AG: Ce even in high resolution spectra. The optimal Tb3+ content for maximum light output of YAG: Ce, Tb was determined to be 20% and for lowest afterglow 100%. (C) 2015 The Electrochemical Society. All rights reserved.