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Start Over Author "Hai-Peng Lu" Topic materials chemistry
3 results on '"Hai-Peng Lu"'

3. Room temperature hydrogen sensor with ultrahigh-responsive characteristics based on Pd/SnO2/SiO2/Si heterojunctions

Author

Qingzhong Xue, Cuicui Ling, Zifeng Yan, Zhide Han, Fujun Xia, Long-Jiang Deng, and Hai-Peng Lu

Subjects
Materials science, business.industry, Response characteristics, Metals and Alloys, Heterojunction, 02 engineering and technology, Sputter deposition, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Hydrogen sensor, Surface energy, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Materials Chemistry, Optoelectronics, Electrical and Electronic Engineering, Operating voltage, 0210 nano-technology, business, Selectivity, Instrumentation
Abstract

A series of Pd/SnO2/SiO2/Si heterojunction sensors were produced using magnetron sputtering method. It is found that the Pd/SnO2/SiO2/Si heterojunction exhibits ultrahigh H2 response of ∼17363% to 1.0% H2 at room temperature, and has fast response and recovery, excellent stability and selectivity. Therefore, this kind of heterojunction may be a promising candidate for effective H2 detection at room temperature. The H2 response characteristics and the optimum operating voltage of the sensors is modulated by the interface barrier potential between SnO2 and Si, which can be understood by the interfacial energy band characteristics of the Pd/SnO2/SiO2/Si heterojunction.

Published
2016
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