All-inorganic halide perovskites, as a dominant member
of the perovskite
family, have been proven to be excellent semiconductors due to the
great successes for solar cells, light-emitting diodes, photodetectors,
and nanocrystal photocatalysts. Despite the remarkable advances in
those fields, there are few research studies focusing on gas and humidity-sensing
performances, especially for pure CsPbBr3 and heterogeneous
CsPbBr3@MoS2 composites. Here, we first report
a valuable CsPbBr3 sensor prepared by electrospinning,
and the excellent gas sensing performances are investigated. The CsPbBr3 sensor can quickly and effectively detect ethanolamine at
room temperature. The response time is only 16 s, and the response
to 100 ppm ethanolamine is as high as 29.87, besides the excellent
repeatability and good stability. The theoretical detection limit
is estimated to be 21 ppb. Furthermore, considering the irreplaceable
role of heterostructures in regulating the electronic structure and
supporting rich reaction boundaries, we also actively explored the
EA sensitivity of inorganic CsPbBr3-based heterogeneous
composites CsPbBr3@MoS2. At the same time, the
roles of the critical capping agents OA and OAm are systematically
investigated. This work demonstrates the great potential of all-inorganic
halide perovskites in promising volatile organic compound detection.
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