Eco-friendly MA₃Bi₂I₉ perovskite thin films based ammonia sensor

Abstract

Organic-Inorganic Perovskite Halides (OIPH) have emerged as a wonder material with growing interest in sensors detecting various toxic gases. However, lead toxicity represents a potential obstacle and therefore finding lead free cost-effective compatible materials for gas sensing applications is essential. In this work, Methylammonium Bismuth Iodide i. e. (CH3NH3)3Bi2I9 (MABI) perovskite thin films-based ammonia (NH3) sensor was synthesized using antisolvent assisted one-step spin coating method. The MABI sensor shows a linear relationship between the responsivity and concentration of NH3 with excellent reversibility, high gas responsivity, and humidity stability. The MABI thin-film sensor exhibits a maximum gas response of 24%, short response/recovery time i. e. 0.14 s /8.15 s and good reversibility at 6 ppm of NH3. This work reveals that it is feasible to design high-performance gas sensors based on environmentally-friendly Bi-based perovskites.

Electrospun PAN/CuO/curcumin composite nanofiber mats for efficient antimicrobial face masks

“…Nanomaterials have several applications such as gas sensors, 6 photocatalysts, 7,8 solar cells, 9 wood preservatives, 10 and environmental remediation applications. 11–13 Antimicrobial nanomaterials have attracted great attention because of their exceptional properties and unique mechanisms of action against microbes.…”