Facile synthesis and enhanced luminescent properties of ZnO/HfO2 core-shell nanowires.
作者： Yuan Zhang , Hong-Liang Lu , Tao Wang , Qing-Hua Ren , Yu-Zhu Gu
DOI: 10.1039/C5NR03656A
关键词:
摘要: The morphological, structural and photoluminescence properties of one-dimensional ZnO/HfO2 core–shell nanowires (NWs) with various thicknesses HfO2 shell layers are studied in detail this work. ZnO NWs have been fabricated by a simple hydrothermal method, which then coated thin using atomic layer deposition (ALD). morphological characterization demonstrates that the shells polycrystalline structures grow on single-crystalline conformally. Moreover, core/shell show remarkable enhanced ultraviolet (UV) emission increasing thickness compared bare NWs. UV intensity for sample ∼16 nm is about 9 times higher than It mainly results from decreased surface states passivation as well typical type-I band alignment structure. A model also proposed to explain evolution wide visible relatively low structures. Our suggest potential applications high-efficiency optoelectronic devices such light-emitting diodes lasers.
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