Luminescent properties of Tm3−xLuxAl5O12:Ce single crystalline films

Abstract The work devoted to the investigation of a new luminescent and scintillation material based on the single crystalline films (SCFs) of Tm 3−x Lu x AG:Ce garnet; x = 0–1.5, grown by LPE method from PbO based flux. The best scintillation properties are achieved for SCFs of Tm 1.5 Lu 1.5 Al 5 O 12 :Ce composition. We have found that direct Tm → Ce and backside Ce → Tm energy transfer processes are observed in Tm 1.5 Lu 1.5 Al 5 O 12 :Ce. Due to elimination of traps in the 300–450 °C range, the relatively fast scintillation decay is realized in highly doped Tm 1.5 Lu 1.5 Al 5 O 12 :Ce SCFs. For this reason, Tm doping can be considered as a suitable way for improvement of the scintillation efficiency in other Ce 3+ doped garnet compounds.