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Realization of n-type and enhanced thermoelectric performance of p-type BiCuSeO by controlled iron incorporation

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Abstract

Layered oxyselenide BiCuSeO has recently attracted much attention as a promising p-type eco-friendly thermoelectric material. The future development of BiCuSeO-based thermoelectric modules requires compatible p- and n-type materials. In the present work, we show that n-type BiCuSeO can be obtained below 500 K by substituting Fe for Cu in pristine BiCuSeO. Besides, co-substitution of Fe for Cu in p-type doped Bi0.94Pb0.06CuSeO can enhance both S and σ, which originates from high hole mobility with relatively high hole concentration, improving the power factor of BiCuSeO remarkably to above 0.9 mW m−1 K−2 in the whole temperature range while maintaining a low thermal conductivity. A high ZTpeak of around 1.5 at 873 K with an average ZT of around 1 between 310 K and 873 K was reproducibly obtained for p-type Bi0.94Pb0.06Cu0.99Fe0.01SeO. This new substitution opens a new direction that could pave the way for practical application of combined p- and n-type BiCuSeO in thermoelectric modules.

Graphical abstract: Realization of n-type and enhanced thermoelectric performance of p-type BiCuSeO by controlled iron incorporation

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Publication details

The article was received on 17 Apr 2018, accepted on 12 Jun 2018 and first published on 13 Jun 2018


Article type: Paper
DOI: 10.1039/C8TA03521K
Citation: J. Mater. Chem. A, 2018, Advance Article
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    Realization of n-type and enhanced thermoelectric performance of p-type BiCuSeO by controlled iron incorporation

    L. Pan, Y. Lang, L. Zhao, D. Berardan, E. Amzallag, C. Xu, Y. Gu, C. Chen, L. Zhao, X. Shen, Y. Lyu, C. Lu and Y. Wang, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C8TA03521K

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