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Issue 22, 2020
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Transparent, flexible MAPbI3 perovskite microwire arrays passivated with ultra-hydrophobic supramolecular self-assembly for stable and high-performance photodetectors

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Abstract

The emergence of organic–inorganic hybrid perovskites (OHPs) has revolutionised the potential performance of optoelectronic devices; most perovskites are opaque and hence incompatible with transparent optoelectronics and sensitive to environmental degradation. Here, we have reported a single-step fabrication of ultra-long MAPbI3 perovskite microwire arrays over a large area using stencil lithography based on sequential vacuum sublimation. The environmental stability of MAPbI3 is empowered with a newly designed and synthesized transparent supramolecular self-assembly based on a mixture of two tripodal L-Phe-C11H23/C7F15 molecules, which showed a contact angle of 105° and served as ultra-hydrophobic passivation layers for more than 45 days in an ambient atmosphere. The MAPbI3 microwire arrays passivated with the supramolecular self-assembly demonstrated for the first time both excellent transparency of ∼89% at 550 nm and a remarkable photoresponse with a photo-switching ratio of ∼104, responsivity of 789 A W−1, detectivity of 1014 Jones, linear dynamic range of ∼122 dB, and rise time of 432 μs. Furthermore, the photodetector fabricated on a flexible PET substrate demonstrated robust mechanical flexibility even beyond 1200 bending cycles. Therefore, the scalable stencil lithography and supramolecular passivation approaches have the potential to deliver next-generation transparent, flexible, and stable optoelectronic devices.

Graphical abstract: Transparent, flexible MAPbI3 perovskite microwire arrays passivated with ultra-hydrophobic supramolecular self-assembly for stable and high-performance photodetectors

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Supplementary files

Article information


Submitted
18 Feb 2020
Accepted
04 May 2020
First published
05 May 2020

Nanoscale, 2020,12, 11986-11996
Article type
Paper

Transparent, flexible MAPbI3 perovskite microwire arrays passivated with ultra-hydrophobic supramolecular self-assembly for stable and high-performance photodetectors

K. D. M. Rao, M. Hossain, Umesh, A. Roy, A. Ghosh, G. S. Kumar, P. Moitra, T. Kamilya, S. Acharya and S. Bhattacharya, Nanoscale, 2020, 12, 11986
DOI: 10.1039/D0NR01394C

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