Numerical Analysis of Roles of Depletion Layer Width in Semiconductor Gas Sensor Using the Gradient-Distributed Oxygen Vacancy Model
Journal Title: Materials Science-Medžiagotyra - Year 2019, Vol 25, Issue 1
Abstract
The roles of depletion layer width in semiconductor gas sensors are quantitatively discussed based on the model of gradient-distributed oxygen vacancies. Several literatures are employed to provide experimental basis of the relationship between depletion layer width and gas sensing characteristics of semiconductor devices. Four series of gas sensors are illustrated and their depletion layer widths are controlled by three different techniques, such as controlling of the dopant amount, sintering in various procedures and usage of various dopants. The model shows a good applicability in analyzing the roles of the depletion layer width in semiconductor gas sensors, as long as the grain radius is larger than the depletion layer width, especially when it is controlled by the doping amount of the foreign elements.
Authors and Affiliations
Jianqiao LIU, Wencong GENG, Guohua JIN, Zhaoxia ZHAI
Keywords
Related Articles
- EP ID EP452511
- DOI 10.5755/j01.ms.25.1.19129
- Views 62
- Downloads 0
Turbulence Imaging Simulation Based on Electrically Tunable Polymer Dispersed Liquid Crystals Cell
In this study, the scattering properties of polymer dispersed liquid crystals (PDLC) and its optical features for use in turbulence image simulation are presented. A PDLC cell composed of a liquid crystal/monomer mixture...
Effect of Er Addition on the High Temperature Strength of Al-Si-Cu-Ni-Mg-Fe Piston Alloys by T5 and T6 Heat Treatment
In this study, the dependence of Er addition (0 – 0.49 wt.%) on the microstructural evolution and related tensile strength at high temperature (HT) were investigated for the eutectic Al-Si piston alloys. The results show...
Defects Promoted Topotactic Transformation from Co(OH)2 Nanodiscs to Co3O4 Nano Octahedra
Topotactic transformation was one of the most frequently related processes in the synthesis process of cobalt oxide nanomaterials. Microstructural evolution studies of this process inform and enable the process of contro...
Effect of Microstructure on the Compressive Mechanical Properties of Ti-20Zr-6.5Al-4V Alloy
The effect of microstructure on the mechanical properties of Ti-20Zr-6.5Al-4V alloy after solution and aging treatment was investigated by compression tests. The results showed that the microstructure was consisted of a...
Modeling and 3D Simulation of the Mould Compression and Resin Flow for Force-Controlled Compression Resin Transfer Moulding
Since the existence of the complicated coupling between mould compression and resin flow, the full 3D simulation of the filling process in force-controlled compression resin transfer moulding (CRTM) has not been realized...