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- W2899424211 abstract "Convergence of L and Σ valence bands through alloying with monotellurides, has successfully realized the significant zT-enhancement in SnTe thermoelectrics. CdTe, as a solvend introducing Cd-substitution at Sn site, has been demonstrated theoretically and experimentally as an effective agent to reduce the energy difference between two valence bands. However, the low solubility of ∼3% for CdTe in SnTe limits the possibility for further zT-enhancement in SnTe, which motivates the existing efforts on increasing solubility of CdTe or exploring Cd-based solvend with higher solubility. Inspired by the solubility as high as 14% for CdSe in SnTe at 1050 K, this work focuses on the effect of CdSe on thermoelectric properties of SnTe. The converged valence bands induced by the heavy Cd-substitution, results in a significant increase in electronic performance. Moreover, CdSe-alloying would simultaneously introduce cation and anion point defects and boundary interfaces of CdSe precipitates, which leads to a strong phonon scattering and therefore a reduced lattice thermal conductivity of ∼0.8 W/m-K. As a result, the synergistic effect of electronic and thermal performances results in a peak zT as high as 1.1 at 850 K, demonstrating (SnTe)1-x(CdSe)x as the promising thermoelectric materials." @default.
- W2899424211 created "2018-11-09" @default.
- W2899424211 creator A5001969147 @default.
- W2899424211 creator A5009848271 @default.
- W2899424211 creator A5011615038 @default.
- W2899424211 creator A5029341096 @default.
- W2899424211 date "2019-03-01" @default.
- W2899424211 modified "2023-10-11" @default.
- W2899424211 title "Band manipulation for high thermoelectric performance in SnTe through heavy CdSe-alloying" @default.
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- W2899424211 doi "https://doi.org/10.1016/j.jmat.2018.10.004" @default.
- W2899424211 hasPublicationYear "2019" @default.
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