Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 7, Issue 9, Pages 2900-2924Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ee00997e
Keywords
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Funding
- Triangle de la Physique [STP 2008-095T]
- International Cooperation Department of Universite Paris-Sud XI
- ANR [ANR 2011 JS08 012 01]
- NSFC [51221291, 51172121]
- startup of South University of Science and Technology of China from Shenzhen government
- national 1000 plan for young scientists
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BiCuSeO oxyselenides have recently acquired ever-increasing attention and have been extensively studied as very promising thermoelectric materials. The ZT of the BiCuSeO system was significantly increased from 0.5 to 1.4 in the past three years, which indicates that BiCuSeO oxyselenides are robust candidates for energy conversion applications. In this review, we first discuss and summarize the crystal structures, microstructures, electronic structures and physical/chemical properties of BiCuSeO oxyselenides. Then, the approaches that successfully enhanced the thermoelectric performances in the BiCuSeO system are outlined, which include increasing carrier concentration, optimizing Cu vacancies, a simple and facile ball milling method, multifunctional Pb doping, band gap tuning, and increasing carrier mobility through texturing. Theoretical calculations to predict a maximum ZT in the BiCuSeO system are also described. Finally, a discussion of future possible strategies is proposed to aim at further enhancing the thermoelectric figure of merit of these materials.
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