Microwave Synthesis and Enhanced Thermoelectric Performance of p-Type Bi0.90Pb0.10Cu1-xFexSeO Oxyselenides

作者：Lei, Ying; Yang, Haoyue; Qiu, Jin; Yong, Chao; Gao, Feng; Fan, Xingxiang; Peng, Sui; Hu, Huaichuan; Wan, Rundong; Li, Yu^*

来源：ACS applied materials & interfaces, 2022, 14(24): 27902-27910.

DOI：10.1021/acsami.2c05731

• BiCuSeO oxyselenide
• microwave synthesis
• carrier transport
• phonon transport
• figure of merit (ZT)

BiCuSeO oxyselenide, one of the best oxygen-containing thermoelectric materials, is promising with great potential applications. In this work, we present a high ZT of >1.3 in Bi0.90Pb0.10Cu0.96Fe0.04SeO fabricated via microwave synthesis and subsequent spark plasma sintering (SPS). We added 3-4 atom % Fe to the Pb-doped BiCuSeO to regulate the hole carrier concentration and mobility to 0.8-1.0 x 10(20) cm(-3) and similar to 40 cm(2) V-1 S-1, respectively, achieving moderate electrical conductivity, high Seebeck coefficient, and low carrier thermal conductivity simultaneously in a dual-doped sample. Under the synergistic enhancement by stress field, dislocation, and nanophase, the lattice thermal conductivity of Bi0.90Pb0.10Cu0.96Fe0.04SeO is limited to 0.24-0.49 W m(-1) K-1 at 300-873 K. The development of efficient preparation methods for high-performance thermoelectric materials is significant to promote the application of thermoelectric conversion technology.

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