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Lower work function of thermoelectric material by ordered arrays

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Abstract

In this paper, PbTe nanocubes are assembled on Bi0.5Sb1.5Te3 substrates with both ordered and disordered structures through a straightforward method to form a P-N section. The work function of such semiconductor system is then measured by the ultraviolet photoelectron spectroscopy. This results show that the work function of orderly arrayed PbTe deposition is much lower than the disordered assemblies. Such change of the work function provides the possibility to tune it in a P-N section system. The change of the work function is attributed to the less surface roughness and easier electron escaping in the ordered structures.

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Authors and Affiliations

  1. Laboratory of Special Ceramics and Powder Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China

    Gang Liu & Guiying Xu

  2. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China

    Gang Liu, Zhenjie Xue, Cong Yan & Tie Wang

Authors
  1. Gang Liu
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  2. Zhenjie Xue
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  3. Guiying Xu
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  4. Cong Yan
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  5. Tie Wang
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Corresponding authors

Correspondence to Cong Yan or Tie Wang.

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Liu, G., Xue, Z., Xu, G. et al. Lower work function of thermoelectric material by ordered arrays. Sci. China Chem. 59, 1264–1269 (2016). https://doi.org/10.1007/s11426-016-0097-3

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  • DOI: https://doi.org/10.1007/s11426-016-0097-3

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