The Advanced Application of Halide Perovskite Materials for Gas Sensor

Area of Science:

• Materials Science
• Chemical Engineering
• Sensor Technology

Background:

• Chemiresistive gas sensors are crucial for health, safety, and environmental monitoring.
• Existing sensors face limitations like high operating temperatures, low sensitivity, and poor selectivity.
• Perovskite materials show promise due to their unique electronic and optical properties.

Purpose of the Study:

• To review recent advancements in perovskite-based gas sensors.
• To analyze the impact of material design and architecture on sensor performance.
• To explore applications in detecting hazardous gases and volatile organic compounds.

Main Methods:

• Systematic analysis of perovskite material design and engineering.
• Dissection of crystal structures and micro/nano-architectures.
• Examination of sensing mechanisms for various gases (H2S, NH3, NOx, CO/CO2, VOCs).

Main Results:

• Perovskite properties significantly influence sensitivity, selectivity, response/recovery time, and stability.
• Successful detection of diverse hazardous gases and VOCs demonstrated.
• Challenges include instability, selectivity issues, and lead toxicity.

Conclusions:

• Lead-free perovskites are a critical research focus for overcoming toxicity and environmental concerns.
• Synergistic innovation in lead-free materials and device engineering is essential.
• Development of robust, high-performance, and sustainable gas sensors is the ultimate goal.