Abstract
The photoluminescence characteristics of undoped and TbCl3-doped zinc oxide films deposited by the spray pyrolysis technique are reported. Undoped films present the characteristic blue-green emission peak at ∼508 nm observed in single-crystal and powder ZnO. The TbCl3-doped films present a luminescence peak at ∼540 nm. The light emission of the doped films decreases with time of exposure of the sample to the excitation light. The phenomenon is interpreted in terms of a simple model in which a competitive process of hole trapping and phototrapping occurs at a radiative recombination center generated by the TbCl3.
Original language | English |
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Pages (from-to) | 2378-2381 |
Number of pages | 4 |
Journal | Journal of Applied Physics |
Volume | 63 |
Issue number | 7 |
DOIs | |
State | Published - 1988 |
Externally published | Yes |