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    Investigation of WO3/ZnO thin-film heterojunction-based Schottky diodes for H2 gas sensing (English)

    In: International Journal of Hydrogen Energy ; 39 , 19 ; 10313-10319  ; 2014
    • ISSN:
      0360-3199
    • Article (Journal)  /  Electronic Resource

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    Abstract A comparative study of Schottky diode hydrogen gas sensors based on Pd/WO3/Si and Pd/WO3/ZnO/Si structure is presented in this work. Atomic force microscopy and X-ray photoelectron spectroscopy reveal that the WO3 sensing layer grown on ZnO has a rougher surface and better stoichiometric composition than the one grown on the Si substrate. Analysis of the I–V characteristics and dynamic response of the two sensors when exposed to different hydrogen concentrations and various temperatures indicate that with the addition of the ZnO layer, the diode can exhibit a larger voltage shift of 4.0 V, 10 times higher sensitivity, and shorter response and recovery times (105 s and 25 s, respectively) towards 10,000-ppm H2/air at 423 K. Study on the energy band diagram of the diode suggests that the barrier height is modulated by the WO3/ZnO heterojunction, which could be verified by the symmetrical sensing properties of the Pd/WO3/ZnO/Si gas sensor with respect to applied voltage.

    Highlights A Schottky diode hydrogen sensor based on WO3/ZnO heterojunction was fabricated. The voltage shift is 4.0 V, 10 times higher than the mono-WO3 layer based device. The enhancement is attributed to the rougher and higher quality of WO3 grown on ZnO. The energy band diagram and the symmetrical sensing property are explained.

    Table of contents – Volume 39, Issue 19

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    The tables of contents are generated automatically and are based on the data records of the individual contributions available in the index of the TIB portal. The display of the Tables of Contents may therefore be incomplete.

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    9943
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    Hamad, Yousif M. / Hamad, Tarek A. / Agll, Abdulhakim Amer A. / Bapat, Sushrut G. / Bauer, Charles / Clum, Andrew / Shivaprasad, Nandish / Thomas, Mathew / Sheffield, John W. et al. | 2014
    9962
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    Zafar, Sayem / Dincer, Ibrahim et al. | 2014
    9973
    Comparative study of artificial intelligence techniques for sizing of a hydrogen-based stand-alone photovoltaic/wind hybrid system
    Maleki, Akbar / Askarzadeh, Alireza et al. | 2014
    9985
    Oxide content optimized ZnS–ZnO heterostructures via facile thermal treatment process for enhanced photocatalytic hydrogen production
    Hong, Eunpyo / Kim, Jung Hyeun et al. | 2014
    9994
    Fermentative H2 production using a switchgrass steam exploded liquor fed to mixed anaerobic cultures: Effect of hydraulic retention time, linoleic acid and nitrogen sparging
    Veeravalli, Sathyanarayanan S. / Chaganti, Subba Rao / Lalman, Jerald A. / Heath, Daniel D. et al. | 2014
    10003
    Using a statistical approach to model hydrogen production from a steam exploded corn stalk hydrolysate fed to mixed anaerobic cultures in an ASBR
    Shanmugam, Saravanan R. / Chaganti, Subba Rao / Lalman, Jerald A. / Heath, Daniel et al. | 2014
    10016
    High-performance biofilm photobioreactor based on a GeO2–SiO2–chitosan-medium-coated hollow optical fiber
    Liao, Qiang / Zhong, Nian-Bing / Zhu, Xun / Chen, Rong et al. | 2014
    10028
    Regulating feedback inhibition caused by the accumulated acid intermediates during acidogenic hydrogen production through feed replacement
    Srikanth, S. / Venkata Mohan, S. et al. | 2014
    10041
    Evaluation of ultrasonication as a treatment strategy for enhancement of biohydrogen production from complex distillery wastewater and process optimization
    Gadhe, Abhijit / Sonawane, Shriram S. / Varma, Mahesh N. et al. | 2014
    10051
    A newly isolated Rhodobacter sphaeroides HY01 with high hydrogen production performance
    Yang, Honghui / Zhang, Jing / Wang, Xueqing / Jiangtao, Feng / Yan, Wei / Liejin, Guo et al. | 2014
    10061
    Performance characteristics of Mo–Ni/Al2O3 catalysts in LPG oxidative steam reforming for hydrogen production
    Malaibari, Zuhair O. / Amin, Ashraf / Croiset, Eric / Epling, William et al. | 2014
    10074
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    10090
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    10101
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    10108
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    10121
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    10135
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    10141
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    Xu, Long / Duan, lin'e / Tang, Mingchen / Liu, Pei / Ma, Xiaoxun / Zhang, Yulong / Harris, H. Gordon / Fan, Maohong et al. | 2014
    10154
    CO2 methanation combined with NH3 decomposition by in situ H2 separation using a Pd membrane reactor
    Miyamoto, Manabu / Hayakawa, Risa / Makino, Yasutaka / Oumi, Yasuhiro / Uemiya, Shigeyuki / Asanuma, Minoru et al. | 2014
    10161
    First-principles study of single atom adsorption on capped single-walled carbon nanotubes
    Shao, Xiji / Luo, Haijun / Cai, Jianqiu / Dong, Changkun et al. | 2014
    10169
    In situ monitoring of the volume change and cracking of a MgTi hydride electrode
    Etiemble, A. / Idrissi, H. / Roué, L. et al. | 2014
    10175
    Interface effects in NaAlH4–carbon nanocomposites for hydrogen storage
    Gao, Jinbao / Ngene, Peter / Herrich, Monika / Xia, Wei / Gutfleisch, Oliver / Muhler, Martin / de Jong, Krijn P. / de Jongh, Petra E. et al. | 2014
    10184
    Effect of multi-wall carbon nanotubes supported palladium addition on hydrogen storage properties of magnesium hydride
    Yuan, Jianguang / Zhu, Yunfeng / Li, Ying / Zhang, Ling / Li, Liquan et al. | 2014
    10195
    Hydrogen storage and demand to increase wind power onto electricity distribution networks
    Carr, Stephen / Premier, Giuliano C. / Guwy, Alan J. / Dinsdale, Richard M. / Maddy, Jon et al. | 2014
    10208
    The characteristics of regenerative energy for PEMFC hybrid system with additional generator
    Kim, Byeong Heon / Kwon, Oh Jung / Song, Jun Seok / Cheon, Seung Ho / Oh, Byeong Soo et al. | 2014
    10216
    A passive lithium hydride based hydrogen generator for low power fuel cells for long-duration sensor networks
    Strawser, D. / Thangavelautham, J. / Dubowsky, S. et al. | 2014
    10230
    Influence of ageing on the dynamic behaviour and the electrochemical characteristics of a 500 We PEMFC stack
    Moçotéguy, Philippe / Ludwig, Bastian / Steiner, Nadia et al. | 2014
    10245
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    Chen, Wei-Chen / Tsai, Dah-Shyang / Tseng, Lin-Wei / Yang, Li-Rong / Le, Minh-Vien et al. | 2014
    10253
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    Yin, Fengxiang / Li, Guoru et al. | 2014
    10258
    High efficient aqueous-film rotating disk photocatalytic fuel cell (RDPFC) with triple functions: Cogeneration of hydrogen and electricity with dye degradation
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    10267
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    10275
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    10284
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    10293
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    The role of induced @a'-martensite on the hydrogen-assisted fatigue crack growth of austenitic stainless steels
    Chen, T. C. / Chen, S. T. / Tsay, L. W. et al. | 2014
    10303
    The effects of temperature and oxygen pressure on the initial oxidation of stainless steel 441
    Chen, Zhiyuan / Wang, Lijun / Li, Fushen / Chou, Kuo Chih / Sun, Zaihong et al. | 2014
    10313
    Investigation of WO3/ZnO thin-film heterojunction-based Schottky diodes for H2 gas sensing
    Liu, Y. / Yu, J. / Lai, P.T. et al. | 2014
    10320
    Corrigendum to “Comparative study of large-scale hydrogen storage technologies: Is hydrate-based storage at advantage over existing technologies?” [Int J Hydrogen Energy 39 (2014) 1888−18894]
    Ozaki, Makoto / Tomura, Shigeo / Ohmura, Ryo / Mori, Yasuhiko H. et al. | 2014
    iii
    Editorial Board
    | 2014

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