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Issue 19, 2018
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An ultra-broadband perovskite-PbS quantum dot sensitized carbon nanotube photodetector

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Abstract

Organic–inorganic perovskites have been hailed as promising candidates for optoelectronic and photovoltaic devices, but their operation remains limited to the visible spectrum. Here, we combine single-wall carbon nanotubes, PbS quantum dots and a perovskite to synthesize hybrid devices suitable for operation in both the visible and near-infrared. The photodetectors thus fabricated show responsivities as high as 0.5 A W−1 and 0.35 A W−1 at 500 nm and at 1300 nm, respectively, with an applied bias of 1 V. Moreover, the incorporation of nanotubes within the perovskite matrix facilitates the carrier extraction, resulting in response time under 250 μs, a gain-bandwidth product of 0.1 MHz and detectivities of 1.4 × 1011 Jones and 0.9 × 1011 Jones at 500 nm and at 1300 nm, respectively. This unique approach opens new pathways for the development of low-cost, high-speed and broadband perovskite-based optoelectronic devices for large-scale manufacturing.

Graphical abstract: An ultra-broadband perovskite-PbS quantum dot sensitized carbon nanotube photodetector

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Publication details

The article was received on 17 Nov 2017, accepted on 23 Apr 2018 and first published on 24 Apr 2018


Article type: Paper
DOI: 10.1039/C7NR08608C
Citation: Nanoscale, 2018,10, 9044-9052
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    An ultra-broadband perovskite-PbS quantum dot sensitized carbon nanotube photodetector

    I. Ka, L. F. Gerlein, I. M. Asuo, R. Nechache and S. G. Cloutier, Nanoscale, 2018, 10, 9044
    DOI: 10.1039/C7NR08608C

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