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Solvothermal Synthesis, Structural and Optical Properties of Phase-Pure Cu3BiS3 Nano-Powders Exhibiting Near-IR Photodetection

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The Cu3BiS3 with a direct band gap of 1.4 eV, crystallizing in orthorhombic phase, devoid of any rare earth metals like indium was synthesized using a facile solvothermal route at 170 °C for 8 hrs. The structure and composition of the obtained nano-powders were confirmed by X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electronic microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The optical properties of the Cu3BiS3 nanorods were investigated by Raman and UV-Visible spectroscopy. Out of 36 Raman active modes, 16 modes were pronounced remaining silent. The current–voltage measurements were performed over the Cu3BiS3 film, on sandwich and in-plane geometries both in dark and light conditions. Measurements showed that in sandwich geometry, the I–V curves followed the SCLC mechanism at a higher bias, and thermionic emission in the in-plane geometry at a lower bias. In-plane IR photoresponse was higher compared to sandwich geometry.
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Keywords: CU3BIS3 NANOPOWDERS; IR PHOTODETECTION; SOLVOTHERMAL ROUTE; THERMAL EVAPORATION

Document Type: Research Article

Publication date: April 1, 2012

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  • Advanced Science, Engineering and Medicine (ASEM) is a science, engineering, technical and medical journal focused on the publishing of peer-reviewed multi-disciplinary research articles dealing with all fundamental and applied research aspects in the areas of (1) Physical Sciences, (2) Engineering, (3) Biological Sciences/Health Sciences, (4) Medicine, (5) Computer and Information Sciences, (6) Mathematical Sciences, (7) Agriculture Science and Engineering, (8) Geosciences, and (9) Energy/Fuels/Environmental/Green Science and Engineering.
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