Synthesis, Characterization, and Device Application of Antimony-Substituted Violet Phosphorus: A Layered Material.
basic_science · Level V
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- Record sourced from PubMed, PMID 28362482.
- Also identified by DOI 10.1021/acsnano.7b00798.
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Abstract
Two-dimensional (2D) nanoflakes have emerged as a class of materials that may impact electronic technologies in the near future. A challenging but rewarding work is to experimentally identify 2D materials and explore their properties. Here, we report the synthesis of a layered material, P<sub>20.56(1)</sub>Sb<sub>0.44(1)</sub>, with a systematic study on characterizations and device applications. This material demonstrates a direct band gap of around 1.67 eV. Using a laser-cutting method, the thin flakes of this material can be separated into multiple segments. We have also fabricated field effect transistors based on few-layer P<sub>20.56(1)</sub>Sb<sub>0.44(1)</sub> flakes with a thickness down to a few nanometers. Interestingly, these field effect transistors show strong photoresponse within the wavelength range of visible light. At room temperature, we have achieved good mobility values (up to 58.96 cm<sup>2</sup>/V·s), a reasonably high on/off current ratio (∼10<sup>3</sup>), and intrinsic responsivity up to 10 μA/W. Our results demonstrate the potential of P<sub>20.56(1)</sub>Sb<sub>0.44(1)</sub> thin flakes as a two-dimensional material for applications in visible light detectors.