Effect of Stability of Two-Dimensional (2D) Aminoethyl Methacrylate Perovskite Using Lead-Based Materials for Ammonia Gas Sensor Application.

ABSTRACT: Changes in physical properties of (H₂C=C(CH₃)CO₂CH₂CH₂NH₃)₂PbI₂Cl₂ and (H₂C=C(CH₃)CO₂CH₂CH₂NH₃)₂Pb(NO₃)₂Cl₂ (2D) perovskite materials from iodide-based (I-AMP) and nitrate-based (N-AMP) leads were investigated at different durations (days) for various storage conditions. UV-Vis spectra of both samples showed an absorption band of around λ_max 420 nm due to the transition of n to π* of ethylene (C=C) and amine (NH₂). XRD perovskite peaks could be observed at approximately 25.35° (I-AMP) and 23.1° (N-AMP). However, a major shift in I-AMP and dramatic changes in the crystallite size, FHWM and crystallinity percentage highlighted the instability of the iodide-based material. In contrast, N-AMP showed superior stability with 96.76% crystallinity even at D20 under the S condition. Both materials were exposed to ammonia (NH₃) gas, and a new XRD peak of ammonium lead iodide (NH₄PbI₃) with a red-shifted perovskite peak (101) was observed for the case of I-AMP. Based on the FWHM, crystallite size, crystallinity and lattice strain analysis, it can be concluded N-AMP's stability was maintained even after a few days of exposure to the said gases. These novel nitrate-based lead perovskite materials exhibited great potential for stable perovskite 2D materials and recorded less toxicity compared to famous lead iodide (PbI₂) material.

SUBMITTER: Mat Yunin MYA 

PROVIDER: S-EPMC9105985 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature