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- W3136472841 abstract "Abstract Copper chalcogenides are outstanding thermoelectric materials for applications in the medium-high temperature range. Among different chalcogenides, while Cu2−xSe is characterized by higher thermoelectric figures of merit, Cu2−xS provides advantages in terms of low cost and element abundance. In the present work, we investigate the effect of different dopants to enhance the Cu2−xS performance and also its thermal stability. Among the tested options, Pb-doped Cu2−xS shows the highest improvement in stability against sulfur volatilization. Additionally, Pb incorporation allows tuning charge carrier concentration, which enables a significant improvement of the power factor. We demonstrate here that the introduction of an optimal additive amount of just 0.3% results in a threefold increase of the power factor in the middle-temperature range (500–800 K) and a record dimensionless thermoelectric figure of merit above 2 at 880 K." @default.
- W3136472841 created "2021-03-29" @default.
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- W3136472841 date "2021-07-01" @default.
- W3136472841 modified "2023-10-17" @default.
- W3136472841 title "Doping-mediated stabilization of copper vacancies to promote thermoelectric properties of Cu2−xS" @default.
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- W3136472841 doi "https://doi.org/10.1016/j.nanoen.2021.105991" @default.
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