Perovskite photodetector-based laser absorption spectroscopy for gas detection.

Authors :: Liu P
Wang C
Yang H
Li Y
Zhang X
Liu X
Li Y
Lou C
Source :: Optics express [Opt Express] 2024 Jun 03; Vol. 32 (12), pp. 21855-21865.
Publication Year :: 2024
Abstract: A gas detection method based on CH <subscript>3</subscript> NH <subscript>3</subscript> PbI <subscript>3</subscript> (MAPbI <subscript>3</subscript> ) and poly (3,4-ethylenedioxythiophene): poly (4-styrene sulfonate) (PEDOT:PSS) composite photodetectors (PDs) is proposed. The operation of the PD primarily relies on the photoelectric effect within the visible light band. Our study involves constructing a gas detection system based on tunable diode laser spectroscopy (TDLAS) and MAPbI <subscript>3</subscript> /PEDOT:PSS PD, and O <subscript>2</subscript> was selected as the target analyte. The system has achieved a minimum detection limit (MDL) of 0.12% and a normalized noise equivalent absorption coefficient (NNEA) of 8.83 × 10 <superscript>-11 </superscript> cm <superscript>-1</superscript> ⋅W⋅Hz <superscript>-1/2</superscript> . Furthermore, the Allan deviation analysis results indicate that the system can obtain sensitivity levels as low as 0.058% over an averaging time of 328 seconds. This marks the first use of MAPbI <subscript>3</subscript> /PEDOT:PSS PD in gas detection based on TDLAS. Despite the detector's performance leaves much to be desired, this innovation offers a new approach to developing spectral based gas detection system.