CsPbBr3 modified polyacrylonitrile gas sensor for room temperature detection of ethanolamine

Polymers have broad application potential in the field of gas sensing, yet research on their sensitisation mechanisms remains limited. In this work, non-conductive polyacrylonitrile (PAN) was converted from a linear to a polyconjugated structure by heat treatment, thereby imparting conductivity. CsPbBr 3 was further introduced to optimise the electronic structure and surface properties, significantly improving the sensitivity to ethanolamine (EA). The resultant CsPbBr 3 /PAN sensor demonstrated exceptional gas selectivity, exhibiting a response value of up to 5.09 at 100 ppm EA. Remarkably, the sensor exhibited a response time of merely 72   s without the need for temperature or ultraviolet irradiation assistance, and it retained stability for a period of two months. This study provides a novel approach to enhancing the gas sensitivity of polymers through electronic structure regulation and material structure optimisation, offering significant theoretical and practical insights for the design and development of high-performance gas sensors.