Proceedings of nanoGe Spring Meeting 2022 (NSM22)
DOI: https://doi.org/10.29363/nanoge.nsm.2022.146
Publication date: 7th February 2022
High performance microscale photodetectors which provide fast and efficient optical-to-electrical signal conversion are critical components for next-generation light-sensing applications. Two-dimensional (2D) metal halide hybrid perovskites are an emerging attractive 2D system that combine appealing optoelectronic properties, i.e. strong optical absorption, high carrier mobility, with high stability, easy-processing and low-cost manufacturing. However, photodetectors based on 2D metal halide hybrid perovskites usually exhibit low responsivity if compared to their 3D counterpart.
Herein, we exploit the improved photostability and suitable optoelectronic properties of high-quality 2D fluorinated-phenethylammonium lead iodide perovskite (F-PEA) single crystals to demonstrate the fabrication of lateral metal-F-PEA-metal junction photodetectors. These devices exhibit larger sensitivity and faster time response than reported to date in 2D perovskites. Finally, we discuss the use of these devices for high-resolution light-sensing applications.
R.M. acknowledges financial support from The European Commission Marie Curie Individual Fellowships (grant no. 843136) K.J.R acknowledges financial support from EPSRC Center for doctoral training in Metamaterials (Grant No. EP/L015331/1) and the 1966 Scholarship. S.R. and M.F.C. acknowledge financial support from EPSRC (Grant no. EP/K010050/1, EP/M001024/1, EP/M002438/1) and from The Leverhulme trust (grants RPG-2016-196 and ``Quantum Drums'').
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