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Role of Oxygen Vacancies in the Electrical Properties of WO3−x NanoMicrorods with Identical Morphology
Joint Authors
Fu, Xiuli
Peng, Zhijian
Shen, Zhenguang
Zhao, Zengying
Wen, Jian
Qian, Jingwen
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-05-13
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
Tungsten oxide (WO3−x) crystalline nano/microrods with identical morphology but different contents of oxygen vacancies were prepared by thermally evaporating fixed amount of WO3 powder in reductive atmosphere from different amounts of S power at 1150°C in a vacuum tube furnace, in which both sources were loaded in separate ceramic boat.
With increasing amount of S powder, a series of tungsten oxides, WO3, WO2.90, W19O55 (WO2.89), and W18O49 (WO2.72), could be obtained.
And devices were fabricated by screen-printing the obtained WO3−x crystals on ceramic substrates with Ag-Pd interdigital electrodes.
With increasing content of oxygen vacancies, the devices fabricated with WO3−x crystals present a negative to positive resistance response to relative humidity.
Under dry atmosphere, for the devices with increasing x, the strong response to light changed from short to long wavelength; under light irradiation, the conducting ability of the devices was enhanced, due to the more efficient separation and transportation of the photogenerated carriers; and under simulated solar irradiation, the photocurrent intensity of the W18O49 device was roughly 8 times, about 500 times, and even 1000 times larger than that of the W19O55, WO2.90, and WO3 one, respectively.
With the versatile optoelectrochemical properties, the obtained WO3−x crystals have the great potential to prepare various humidity sensors and optoelectrical devices.
American Psychological Association (APA)
Shen, Zhenguang& Zhao, Zengying& Wen, Jian& Qian, Jingwen& Peng, Zhijian& Fu, Xiuli. 2018. Role of Oxygen Vacancies in the Electrical Properties of WO3−x NanoMicrorods with Identical Morphology. Journal of Nanomaterials،Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1194818
Modern Language Association (MLA)
Shen, Zhenguang…[et al.]. Role of Oxygen Vacancies in the Electrical Properties of WO3−x NanoMicrorods with Identical Morphology. Journal of Nanomaterials No. 2018 (2018), pp.1-12.
https://search.emarefa.net/detail/BIM-1194818
American Medical Association (AMA)
Shen, Zhenguang& Zhao, Zengying& Wen, Jian& Qian, Jingwen& Peng, Zhijian& Fu, Xiuli. Role of Oxygen Vacancies in the Electrical Properties of WO3−x NanoMicrorods with Identical Morphology. Journal of Nanomaterials. 2018. Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1194818
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1194818