Journal
ACS NANO
Volume 11, Issue 4, Pages 4105-4113Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.7b00798
Keywords
layered material; field effect transistor; antimony-substituted violet phosphorus; photoresponse; mobility
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Funding
- Technische Universitat Munchen Graduate School
- King Abdulaziz City for Science and Technology (KACST)
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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, P20.56(1)Sb0.44(1), 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 P20.56(1)Sb0.44(1) 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(2)/V.s), a reasonably high on/off current ratio (similar to 10(3)), and intrinsic responsivity up to 10 mu A/W. Our results demonstrate the potential of P20.56(1)Sb0.44(1) thin flakes as a two-dimensional material for applications in visible light detectors.
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