CsPbBr₃-Based Nanostructures for Room-Temperature Sensing of Volatile Organic Compounds

Abstract

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.

Compositional engineering of ZnBr2-doped CsPbBr3 perovskite nanocrystals: insights into structure transformation, optical performance, and charge-carrier dynamics

“…Lead-halide perovskite nanocrystals (LHPNC) have been considered next-generation light-emitting semiconductors with promising applications in optoelectronics, such as photovoltaic cells, 1 photodetectors, 2 low-threshold lasers, 3 light-emitting diodes (LEDs) for solid-state lighting and display technologies, 4 anticounterfeiting, 5 sensors 6 and X-ray scintillators 7 because of their narrow PL, tunable bandgap, near unity photoluminescence quantum yield (PLQY), reduced fluorescent blinking, high defect tolerance, and efficient radiative recombination, which is achieved through the confinement of excitons in small sizes. 8 Significant advances have been made in the synthesis of LHPNCs using various techniques, which have enabled precise control of their composition, size, and shape to produce emission that spans the entire spectrum, from near-ultraviolet (UV) to near-infrared.…”

Ambient Stable CsPbBr3/ZnO Nanostructures for Ethanolamine Sensing

“…All-inorganic halide perovskites (AIHPs, CsPbX 3 , X = Cl, Br, and I), as a unique branch of perovskite materials with adjustable optical band gap, the highly effective carrier mobility, low exciton binding energy, wide band absorption and so forth, − have aroused great attention and research interest for their important applications of solar cells, photodetectors, lasers, light-emitting diodes (LEDs), and gas sensors. − Compared with other AIHPs, CsPbBr 3 looks particularly well-positioned within the life and health threatening volatile organic compound (VOC) sensing detection . Chen et al prepared inorganic halide perovskite CsPbBr 3 for high-performance acetone sensing .…”

“…6−9 Compared with other AIHPs, CsPbBr 3 looks particularly well-positioned within the life and health threatening volatile organic compound (VOC) sensing detection. 10 Chen et al prepared inorganic halide perovskite CsPbBr 3 for high-performance acetone sensing. 11 The response value to 1 ppm acetone is 0.03, and the response and recovery time are 9.8 and 5.8 s, respectively.…”

Three-Dimensional van der Waals Heterostructure-Based Nanocages as Supersensitive 3-Hydroxy-2-butanone Gas Sensors at Room Temperature

“…The unique sensing performance could be designed through the axial connection of the porphyrin ring and central metal oxide, which allowed for being applied in such hi-tech applications as gas sensors . Therefore, composite materials with a high specific area and modifiable function were still highly sought after for developing high-performance room-temperature gas sensors . In this work, a strategy based on 3D nanoporous tetra-4-aminophenyl porphyrin-based covalent organic frameworks@SnO 2 @multiwalled carbon nanotubes (TAPP-COFs@SnO 2 @MWCNTs) nanocage structural sensing materials as supersensitive gas sensors for detecting 3H-2B, built with van der Waals heterostructure-based composite nanotubes, was demonstrated.…”