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    The integration of optoelectronic devices, such as transistors and photodetectors (PDs), into wearables and textiles is of great interest for applications such as healthcare and physiological monitoring. These require flexible/wearable systems adaptable to body motions, thus materials conformable to non-planar surfaces, and able to maintain performance under mechanical distortions. Here, fibre PDs are prepared by combining rolled graphene layers and photoactive perovskites. Conductive fibres (~500 Ωcm-1) are made by rolling single-layer graphene (SLG) around silica fibres, followed by deposition of a dielectric layer (Al2O3 and parylene C), another rolled SLG as a channel, and perovskite as photoactive component. The resulting gate-tunable PD has a response time~9ms, with an external responsivity~22kAW-1 at 488nm for a 1V bias. The external responsivity is two orders of magnitude higher, and the response time one order of magnitude faster, than state-of-the-art wearable fibre-based PDs. Under bending at 4mm radius, up to~80% photocurrent is maintained. Washability tests show~72% of initial photocurrent after 30 cycles, promising for wearable applications. © 2024 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.

    Citation

    S Akhavan, A Taheri Najafabadi, S Mignuzzi, M Abdi Jalebi, A Ruocco, I Paradisanos, O Balci, Z Andaji-Garmaroudi, I Goykhman, L G Occhipinti, E Lidorikis, S D Stranks, A C Ferrari. Graphene-Perovskite Fibre Photodetectors. Advanced materials (Deerfield Beach, Fla.). 2024 Aug;36(35):e2400703


    PMID: 38824387

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