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Physical preparation and optical properties of CuSbS2 nanocrystals by mechanical alloying process

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Abstract

CuSbS2 nanocrystals have been synthesized through mechanical alloying Cu, Sb and S elemental powders for 40 hs. The optical spectrum of as-milled CuSbS2 nano-powders demonstrates a direct gap of 1.35 eV and an indirect gap of 0.36 eV, which are similar to that of silicon and reveals the evidence for the indirect semiconductor characterization of CuSbS2. Afterwards, CuSbS2 nanocrystals were capped with trioctylphosphine oxide/trioctylphosphine/pyridine (TOPO/TOP). There appear four sharp absorption peaks within the region of 315 to 355 nm for the dispersion solution containing the capped nanocrystals. The multiple peaks are proposed to be originating from the energy level splitting of 1S electronic state into four discrete sub-levels, where electrons were excited into the conduction band and thus four exciton absorption peaks were produced.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China

    Huihui Zhang, Qishu Xu & Guolong Tan

Authors
  1. Huihui Zhang
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  2. Qishu Xu
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  3. Guolong Tan
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Correspondence to Guolong Tan.

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Zhang, H., Xu, Q. & Tan, G. Physical preparation and optical properties of CuSbS2 nanocrystals by mechanical alloying process. Electron. Mater. Lett. 12, 568–573 (2016). https://doi.org/10.1007/s13391-016-6075-4

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  • DOI: https://doi.org/10.1007/s13391-016-6075-4

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