Journal
SENSORS
Volume 22, Issue 21, Pages -Publisher
MDPI
DOI: 10.3390/s22218155
Keywords
lead halide perovskites; two-dimensional perovskite; (PEA)(2)PbBr4; detection; ethanol sensor
Funding
- National Science and Technology Council (Taiwan) [111-2221-E-027-040-MY3, 111-2221-E-262-006]
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The study demonstrates that 2D perovskite shows higher response in vapor sensing compared to 3D perovskite, due to its large surface-to-volume ratio and reactive surface. This makes 2D perovskite more suitable for vapor sensing and trapping applications.
Two-dimensional (2D) perovskite have been widely researched for solar cells, light-emitting diodes, photodetectors because of their excellent environmental stability and optoelectronic properties in comparison to three-dimensional (3D) perovskite. In this study, we demonstrate the high response of 2D-(PEA)(2)PbBr4 perovskite of the horizontal vapor sensor was outstandingly more superior than 3D-MAPbBr(3) perovskite. 2D transverse perovskite layer have the large surface-to-volume ratio and reactive surface, with the charge transfer mechanism, which was suitable for vapor sensing and trapping. Thus, 2D perovskite vapor sensors demonstrate the champion current response ratio R of 107.32 under the ethanol vapors, which was much faster than 3D perovskite (R = 2.92).
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