Properties and alcohol sensing applications of quasi-2D (PEA)2(MA)3Sb2Br9 thin films

Chien-Min Hun; Lung-Chien Chen

doi:10.1186/s11671-023-03806-8

Properties and alcohol sensing applications of quasi-2D (PEA)₂(MA)₃Sb₂Br₉ thin films

Discov Nano. 2023 Feb 20;18(1):19. doi: 10.1186/s11671-023-03806-8.

Authors

Chien-Min Hun¹, Lung-Chien Chen²

Affiliations

¹ Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, 10608, Taiwan.
² Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, 10608, Taiwan. ocean@ntut.edu.tw.

Abstract

We fabricated an alcohol detector based on (PEA)₂(CH₃NH₃)₃Sb₂Br₉ ((PEA)₂MA₃Sb₂Br₉) lead-free perovskite-like films. The XRD pattern revealed that the (PEA)₂MA₃Sb₂Br₉ lead-free perovskite-like films exhibited a quasi-2D structure. The optimal current response ratios are 74 and 84 for 5 and 15% alcohol solutions, respectively. When the amount of PEABr decreases in the films, the conductivity of the sample in ambient alcohol with a high alcohol concentration solution increases. The alcohol was dissolved into water and carbon dioxide due to the catalyst effect of the quasi-2D (PEA)₂MA₃Sb₂Br₉ thin film. The rise and fall times for the alcohol detector were 1.85 and 0.7 s, respectively, indicating that the detector was suitable.

Keywords: (PEA)2MA3Sb2Br9; Alcohol detectors; Lead-free perovskite; Quasi-2D material.

Grants and funding

111-2221-E-027-040-MY3/Ministry of Science and Technology, Taiwan