State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
Phys Chem Chem Phys. 2023 May 10;25(18):12668-12683. doi: 10.1039/d3cp00030c.
Semiconductor materials with wide bandgaps are extensively employed for gas detection due to their advantages of low cost, high sensitivity, fast speed, excellent stability, and distinctive selectivity. Previous studies have reported on different kinds of semiconductor materials and their complex synthesis procedures. However, the research progress on gas-sensitive mechanisms seriously lags behind the performance improvement. The research route of the gas-sensing mechanism is not clear, resulting in an unclear development direction of novel sensitive materials. This review aims to summarize existing approaches and their progress on the interpretation of gas-sensing mechanisms in semiconductors, such as the calculations based on density functional theory, semiconductor physics, and experiments. Ultimately, a reasonable route for the mechanism investigation has been proposed. It guides the development direction of novel materials and reduces the cost of screening highly selective materials. Overall, this review can provide helpful guidance concerning the gas-sensitive mechanism for scholars.
具有宽能隙的半导体材料由于其成本低、灵敏度高、速度快、稳定性好、选择性好等优点，被广泛应用于气体检测。先前的研究已经报道了不同种类的半导体材料及其复杂的合成程序。然而，气体敏感机制的研究进展严重滞后于性能的提高。气体传感机制的研究途径不明确，导致新型敏感材料的发展方向不明确。本综述旨在总结现有的解释半导体气体传感机制的方法及其进展，如基于密度泛函理论、半导体物理和实验的计算。最终，提出了一种合理的机制研究途径。它指导了新型材料的发展方向，并降低了筛选高选择性材料的成本。总的来说，这篇综述为学者们提供了有关气体敏感机制的有益指导。
