Document Detail

Intrinsic and interfacial effect of electrode metals on the resistive switching behaviors of zinc oxide films.
MedLine Citation:
PMID:  25274278     Owner:  NLM     Status:  Publisher    
Exploring the role of electrode metals on the resistive switching properties of metal electrode/oxide/metal electrode sandwiched structures provides not only essential information to understand the underlying switching mechanism of the devices, but also useful guidelines for the optimization of the switching performance. A systematic study has been performed to investigate the influence of electrodes on the resistive switching characteristics of zinc oxide (ZnO) films in this contribution, in terms of both the intrinsic and interfacial effects. It has been found that the low-resistance state resistances (ΩLRS) of all the investigated devices are below 50 Ω, which can be attributed to the formation of highly conductive channels throughout the ZnO films. On the other hand, the high-resistance state resistances (ΩHRS) depend on the electronegativity and ionic size of the employed electrode metals. Devices with electrode metals of high electronegativity and large ionic size possess high ΩHRS values, while those with electrode metals of low electronegativity and small ionic size carry low ΩHRS values. A similar trend of the set voltages has also been observed, while the reset voltages are all distributed in a narrow range close to ±0.5 V. Moreover, the forming voltages of the switching devices strongly depend on the roughness of the metal/ZnO and/or ZnO/metal interface. The present work provides essential information for better understanding the switching mechanism of zinc oxide based devices, and benefits the rational selection of proper electrode metals for the device performance optimization.
W H Xue; W Xiao; J Shang; X X Chen; X J Zhu; L Pan; H W Tan; W B Zhang; Z H Ji; G Liu; X-H Xu; J Ding; R-W Li
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-10-02
Journal Detail:
Title:  Nanotechnology     Volume:  25     ISSN:  1361-6528     ISO Abbreviation:  Nanotechnology     Publication Date:  2014 Oct 
Date Detail:
Created Date:  2014-10-3     Completed Date:  -     Revised Date:  2014-10-3    
Medline Journal Info:
Nlm Unique ID:  101241272     Medline TA:  Nanotechnology     Country:  -    
Other Details:
Languages:  ENG     Pagination:  425204     Citation Subset:  -    
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