DOIAbstract
The excited state dynamics Y1-xDyxPO4 (x= 0.005 - 0.1) single crystals have been investigated as a function of the temperature and of the concentration. When x=0.005 the 4F 9/2 emission decays exponentially with time constant of the order of 480-500 μs. For higher doping levels the curves are non exponential, indicating that energy transfer processes take place. The Inokuti-Hirayama model applied to the analysis of the decay profiles of the 3% doped crystal has allowed to obtain information about the transfer mechanism
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