Contact
    Start Publications Langmuir-Blodgett fabrication of large-area black ...
    ←  Publication Finder
    KSV NIMA

    Langmuir-Blodgett fabrication of large-area black phosphorus-C(60)thin films and heterojunction photodetectors

    Year: 2020

    Journal: Nanoscale, Volume 12, OCT 14, page 19814–19823

    Authors: Mao, J; Ortiz, O; Wang, JJ; Malinge, A; Badia, A; Kena-Cohen, S

    Organizations: NSERCNatural Sciences and Engineering Research Council of Canada (NSERC) [STPGP-506808]; Canada Research Chairs programCanada Research Chairs

    Black phosphorus (BP) has emerged as a promising two-dimensional (2D) semiconductor for applications in electronics, optoelectronics, and energy storage. As is the case for many 2D materials, the fabrication of large-area BP thin films remains a considerable challenge. Here, we report the assembly of BP nanosheets into compact thin films using the Langmuir-Blodgett (LB) technique. The overlapping stacking between BP nanosheets is suppressed when the nanosheets are surrounded by fullerene C(60)molecules due to physisorption. This allows for the fabrication of large-area BP films (20 mm x 18 mm) with a homogenous nanosheet distribution and negligible oxidation. The fabricated films show measurable absorption up to 2.3 mu m. We use these films as active layers to demonstrate mm-sized BP heterojunction photodetectors with mA W(-1)scale responsivities from the visible to the near-infrared. Photodetector internal quantum efficiencies at 660 nm and 808 nm are 5% and 1%, respectively.
    View publication