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      Quantum confinement and photoresponsivity of β-In2Se3 nanosheets grown by physical vapour transport

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      readme.txt (923bytes)
      Publication date
      2016-06-01
      Creators
      Balakrishnan, Nilanthy
      Beton, Peter
      Patane, Amalia
      Metadata
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      Description
      We demonstrate that β-In2Se3 layers with thickness ranging from 2.8 – 100 nm can be grown on SiO2/Si, mica and graphite using a physical vapour transport method. The β-In2Se3 layers are chemically stable at room temperature and exhibit a blue-shift of the photoluminescence emission when the layer thickness is reduced, due to strong quantum confinement of carriers by the physical boundaries of the material. The layers are characterized using Raman spectroscopy and X-ray diffraction from which we confirm lattice constants c = 28.310.05 Å and a = 3.990.02 Å. In addition, these layers show high photoresponsivity of up to ~ 2×103 A/W at a wavelength of 633 nm, with rise and decay times of 0.6 ms and 2.5 ms, respectively, confirming the potential of the as-grown layers for high sensitivity, fast photodetectors.
      External URI
      • https://rdmc.nottingham.ac.uk/handle/internal/47
      DOI
      • http://doi.org/10.17639/nott.44
      Related publication DOI
      • 10.1088/2053-1583/3/2/025030
      Subjects
      • Nanostructured materials -- Optical properties
      • Photoluminescence
      • Lattice dynamics
      • Physical sciences::Materials science
      • Physical sciences::Physics::Chemical physics, Solid-state physics
      • Q Science::QC Physics::QC170 Atomic physics. Constitution and properties of matter
      Divisions
      • University of Nottingham, UK Campus::Faculty of Science::School of Physics and Astronomy
      Deposit date
      2016-06-29
      Data type
      Images acquired using scanning probe microscopy, datasets of spectroscopic measurements
      Contributors
      • Eaves, Laurence
      • Makarovskiy, Oleg
      • Staddon, Christopher
      • Smith, E.F.
      Funders
      • Funders::Engineering & Physical Sciences Research Council
      Grant number
      • EP/M012700/1
      • EP/K005138/1
      Data collection method
      Asylum MFP3D Atomic Force Microscope, Horiba LABRAM sptromicroscope
      Resource languages
      • en
      Copyright
      • University of Nottingham
      Publisher
      University of Nottingham

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