2D perovskites devices and applications
Saverio Russo a
a University of Exeter, United Kingdom
NIPHO25
Proceedings of International Conference on Perovskite Thin Film Photovoltaics and Perovskite Photonics and Optoelectronics (NIPHO25)
Cagliari, Italy, 2025 June 9th - 10th
Organizers: Giulia Grancini, Daniela Marongiu and Aldo Di Carlo
Invited Speaker, Saverio Russo, presentation 055
Publication date: 24th April 2025

Layered perovskites are an emerging attractive two-dimensional (2D) system with enhanced stability to ambient conditions as opposed to their highly unstable 3D counterpart. Their uniquely tuneable optical and electrical properties are underpinning a surge of interest in 2D-photovoltaics. So far, the development of nano-scale integrated opto-electronic 2D perovskite devices remains nearly unexplored since they have generally been found to be incompatible with standard top-down semiconductor nano-fabrication technologies. Here, I will review recent advances on the top-down fabrication in ambient conditions of transistors and photodetectors down to the nanoscale based on 2D-fluorinated phenethylammonium lead iodide perovskite. I will show that the figures of merit of the photodetectors based on this material rival commercial Si technologies, underpinning applications across healthcare and environmental sensing. Finally, I will discuss the role of defects on the performance of these devices, and a novel method for their in-situ characterization.

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