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

Area of Science:

• Materials Science
• Chemical Sensing
• Semiconductor Physics

Background:

• All-inorganic halide perovskites are established semiconductors with applications in solar cells and LEDs.
• Research on their gas and humidity-sensing capabilities, particularly for CsPbBr3 and CsPbBr3@MoS2 composites, remains limited.

Purpose of the Study:

• To develop and investigate the gas-sensing performance of an electrospun CsPbBr3 sensor.
• To explore the ethanolamine (EA) sensitivity of CsPbBr3@MoS2 heterostructures.
• To evaluate the influence of capping agents (OA and OAm) on sensing properties.

Main Methods:

• Fabrication of a CsPbBr3 sensor using electrospinning.
• Testing the sensor's response to ethanolamine at room temperature.
• Investigating the sensing characteristics of CsPbBr3@MoS2 composites.

Main Results:

• The CsPbBr3 sensor demonstrated rapid and effective detection of ethanolamine at room temperature (16 s response time, 29.87 response to 100 ppm EA).
• Excellent repeatability, stability, and a theoretical detection limit of 21 ppb were achieved.
• CsPbBr3@MoS2 composites were explored for EA sensitivity, with capping agent roles investigated.

Conclusions:

• All-inorganic halide perovskites, specifically CsPbBr3, exhibit significant potential for volatile organic compound (VOC) detection.
• The developed CsPbBr3 sensor offers a promising platform for sensitive and selective gas sensing applications.
• Heterostructure engineering and capping agent optimization can further enhance perovskite-based gas sensors.