Investigation of Volt-Ampere Characteristics of a Gas Sensitive Sensor Based on Tin Dioxide

Abstract

The volt-ampere characteristics of the sensitive elements of gas sensors are investigated and plotted in coordinates corresponding to various mechanisms of the transfer current. It has been established that the prevailing mechanism of current transfer in the section from 0 to 6 V is Om’s law, in the interval (3 - 6) V the Mott’s law is fulfilled, and at higher voltages deviations from these laws are observed. It is determined that the laws of Om and Mot confirm the mechanism of the flow of currents limited by the space charge.

Keywords

• Tin dioxide
• Sensor
• Heterojunction
• Gas sensing
• Sensitive element PACS: 78.30.Am