Open AccessFast‐Response Oxygen Optical Fiber Sensor based on PEA 2 SnI 4 Perovskite with Extremely Low Limit of Detection
Author(s) -
Cai Shunshuo,
Ju Yangyang,
Wang Yangming,
Li Xiaowei,
Guo Tuan,
Zhong Haizheng,
Huang Lingling
Publication year - 2022
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202104708
Subject(s) - oxygen sensor , materials science , oxygen , detection limit , fiber optic sensor , optical fiber , halide , perovskite (structure) , fiber bragg grating , tin , response time , tin dioxide , fabrication , optoelectronics , fiber , optics , chemistry , inorganic chemistry , computer science , composite material , metallurgy , wavelength , alternative medicine , pathology , chromatography , medicine , physics , organic chemistry , crystallography , computer graphics (images)
Abstract Oxygen sensor is an important technique in various applications including industrial process control, medical equipment, biological fabrication, etc. The reported optical fiber‐based configurations so far, using gas‐sensitive coating do not meet the stringent performance targets, such as fast response time and low limit of detection (LOD). Tin‐based halide perovskites are sensitive to oxygen with potential use for sensor applications. Here, the halide perovskite‐based oxygen optical fiber sensor by combining phenylethylammonium tin iodide (PEA 2 SnI 4 ) and tilted fiber Bragg grating (TFBG) is demonstrated. The PEA 2 SnI 4 ‐based oxygen optical fiber sensor is reversible at room temperature with a response time of about 10 s, and the experimental LOD approaches to an extremely low oxygen concentration of about 50 ppm. The as‐fabricated oxygen sensor shows a relative response change of 0.6 dB for an oxygen concentration increase from 50 ppm to 5% with good gas selection against NO 2 , CO, CO 2 , H 2 . This work extends the sensor applications of halide perovskites, providing a novel technique for rapid and repeatable oxygen gas detection at a low level.