本文提出了一种新型结构气敏元件,即N-P型半导体组合气敏元件。理论分析表明,该种元件可实现灵敏度的倍增,从而有效地提高气敏元件的灵敏度,实现ppb级的检测。此外,在一定条件下,该种元件还可提高选择性和热稳定性,缩短初期弛豫时间。 In this paper, a new type of gas sensor is proposed, which is N-P type semiconductor gas sensor. Theoretical analysis shows that this kind of element can realize the doubling of the sensitivity, so as to effectively improve the sensitivity of the gas sensor and realize the ppb level detection. In addition, under certain conditions, the kind of components can also improve the selectivity and thermal stability, shorten the initial relaxation time.