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Issue 27, 2018
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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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Supplementary files

Article information


Submitted
17 Apr 2018
Accepted
12 Jun 2018
First published
13 Jun 2018

J. Mater. Chem. A, 2018,6, 13340-13349
Article type
Paper

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, 6, 13340
DOI: 10.1039/C8TA03521K

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