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; Lu, HL (reprint author), Fudan Univ, State Key Lab ASIC & Syst, Inst Adv Nanodevices, Sch Microelect, Shanghai 200433, Peoples R China.
2015
发表期刊NANOSCALE
ISSN2040-3364
卷号7期号:37页码:15462—15468
文章类型期刊文献
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.
关键词Atomic Layer Deposition Sheathed Mgo Nanorods Near-band-edge Surface Modification Zno Nanostructures Optical-properties Zinc-oxide Growth Arrays Photoluminescence
收录类别SCI
语种英语
WOS记录号WOS:000361675300055
引用统计
被引频次:10[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/24927
专题中科院上海应用物理研究所2011-2018年
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.
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.,...&Lu, HL .(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.
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