Electron traps in Tb3+-doped CaA12O4

D. Jia, Xiao Jun Wang, W. M. Yen

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Abstract

Tb3+ -doped CaA12O4 samples were prepared and studied. The 5D3,4 to 7FJ (J = 6, 5, 4,...) afterglow emissions of Tb3+ with a persistence time of 1 h are observed. Photoconductivity experiment determined that the ground state of Tb3+ is 0.4 eV above the top of the CaA12O4 valence band. Two thermoluminescence peaks (-3 and 114 °C) and two thermal stimulated current peaks (-5 and 119 °C) were also detected. The results indicated that the traps at -3 °C (1.08 eV) are close to Tb3+ emission centers, while the traps at 114 °C (0.66 eV) are far away from the centers.

Original languageEnglish
Pages (from-to)241-244
Number of pages4
JournalChemical Physics Letters
Volume363
Issue number3-4
DOIs
StatePublished - Sep 9 2002

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