Photoluminescence enhancement of ZnO nanowire arrays by atomic layer deposition of ZrO2 layers and thermal annealing
作者： Yuan Zhang , Hong-Liang Lu , Tao Wang , Qing-Hua Ren , Hong-Yan Chen
DOI: 10.1039/C6CP01900E
关键词: Atomic layer deposition 、 Blueshift 、 Thermal treatment 、 Crystallite 、 Nanowire 、 Optoelectronics 、 Photoluminescence 、 Annealing (metallurgy) 、 Materials science 、 Passivation 、 Nanotechnology
摘要: The effects of shell thickness and rapid thermal annealing on photoluminescence properties one-dimensional ZnO/ZrO2 core/shell nanowires (NWs) are studied in this work. structures were synthesized by coating thin ZrO2 layers the surface ZnO NWs using atomic layer deposition. morphological structural characterization studies reveal that shells have a polycrystalline structure, which uniformly conformally coated high quality single-crystal NWs. As compared with bare NWs, show remarkable continuous enhancement ultraviolet (UV) emission intensity increasing up to 10 nm. great improvement mechanism UV arises from passivation efficient carrier confinement effect type-I system. Moreover, it is observed after increases temperature. dominant exciton (SX) nanostructures has been detected low temperature spectra. A blue shift NBE peak as well varied decay rate SX also found growth further treatment. Our results suggest could be widely implemented optical electronic devices future.
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