Facile synthesis and enhanced luminescent properties of ZnO/HfO2 core-shell nanowires

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	Facile synthesis and enhanced luminescent properties of ZnO/HfO2 core-shell nanowires
	Zhang, Y; Lu, HL; Wang, T; Ren, QH; Gu, YZ; Li, DH; Zhang, DW
刊名	NANOSCALE
	2015
卷号	7 期号:37 页码:15462—15468
关键词	ATOMIC LAYER DEPOSITION SHEATHED MGO NANORODS NEAR-BAND-EDGE SURFACE MODIFICATION ZNO NANOSTRUCTURES OPTICAL-PROPERTIES ZINC-OXIDE GROWTH ARRAYS PHOTOLUMINESCENCE
ISSN号	2040-3364
通讯作者	Lu, HL (reprint author), Fudan Univ, State Key Lab ASIC & Syst, Inst Adv Nanodevices, Sch Microelect, Shanghai 200433, Peoples R China.
英文摘要	The morphological, structural and photoluminescence properties of one-dimensional ZnO/HfO2 core-shell nanowires (NWs) with various thicknesses of HfO2 shell layers are studied in detail in this work. The ZnO NWs have been fabricated by a simple hydrothermal method, which are then coated by thin HfO2 shell layers using atomic layer deposition (ALD). The morphological and structural characterization demonstrates that the HfO2 shells with polycrystalline structures grow on the single-crystalline ZnO NWs conformally. Moreover, the ZnO/HfO2 core/shell NWs show remarkable enhanced ultraviolet (UV) emission with increasing thickness of the HfO2 shell layer compared with bare ZnO NWs. The UV emission intensity for the sample with HfO2 shell thickness of similar to 16 nm is about 9 times higher than that of bare ZnO NWs. It mainly results from the decreased surface states by surface passivation of the HfO2 shell layer as well as a typical type-I band alignment in the ZnO/HfO2 core/shell structure. A model is also proposed to explain the evolution of the wide visible emission band with the relatively low intensity of the core/shell structures. Our results suggest that the ZnO/HfO2 core/shell structures have potential applications for high-efficiency optoelectronic devices such as UV light-emitting diodes and lasers.
收录类别	SCI
语种	英语
WOS记录号	WOS:000361675300055
公开日期	2016-03-08
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/24927]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Zhang, Y,Lu, HL,Wang, T,et al. Facile synthesis and enhanced luminescent properties of ZnO/HfO2 core-shell nanowires[J]. NANOSCALE,2015,7(37):15462—15468.
APA	Zhang, Y.,Lu, HL.,Wang, T.,Ren, QH.,Gu, YZ.,...&Zhang, DW.(2015).Facile synthesis and enhanced luminescent properties of ZnO/HfO2 core-shell nanowires.NANOSCALE,7(37),15462—15468.
MLA	Zhang, Y,et al."Facile synthesis and enhanced luminescent properties of ZnO/HfO2 core-shell nanowires".NANOSCALE 7.37(2015):15462—15468.