Synthesis and temperature-dependent near-band-edge emission of chain-like Mg-doped ZnO nanoparticles
- 6 March 2006
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 88 (10) , 101902
Abstract
Chain-like Mg-doped ZnO nanoparticles were prepared using a wet chemical method combined with subsequent heat treatment. The blueshifted near-band-edge emission of the doped ZnO sample with respect to the undoped one was investigated by temperature-dependent photoluminescence. Based on the energy shift of the free-exciton transition, a band gap enlargement of ∼83meV was estimated, which seems to result in the equivalent shift of the bound-exciton transition. At 50K, the transformation from the donor-acceptor-pair to free-to-acceptor emissions was observed for both the undoped and doped samples. The results show that Mg doping leads to the decrease of the acceptor binding energy.Keywords
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