Synthesis and luminescence properties of ZnO:Tb~(3+) nanotube arrays via electrodeposited method

摘要

ZnO:Tb~(3+) nanotube arrays were prepared using anodic alumina membranes (AAMs) via electrodeposited method. The diameter and thickness of the ZnO:Tb~(3+) nanotubes are about 80 and 15 nm, respectively. The XRD patterns indicate that Tb~(3+) ions may occupy Zn sites or interstitial in the ZnO crystal lattice. A discussion of the precipitate deposited on the AAMs was made. It can be concluded that the ZnO:Tb~(3+) nanotubes result from the decomposition of the mixtures of oxalates and hydroxides. The PL emission spectrum shows that a new UV emission band centered at 344 nm emerges and the PL emission intensity of ZnO decreases with the increase of the Tb ~(3+) concentration. Based on the results, an energy-level schematic drawing for the electron transition processes in the ZnO:Tb~(3+) nanotube arrays is proposed.