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• W2997264412 abstract "Abstract Ge 2 Sb 2 Te 5 is a famous phase‐change memory material for rewriteable optical storage, which is widely applied in the information storage field. The stable trigonal phase of Ge 2 Sb 2 Te 5 shows potential as a thermoelectric material as well, due to its tunable electrical transport properties and low lattice thermal conductivity. In this work, the carrier concentration and effective mass of Ge 2 Sb 2 Te 5 are modulated by substituting Te with Se. Meanwhile, the thermal conductivity reduces from 2.48 W m −1 K −1 for Ge 2 Sb 2 Te 5 to 1.37 W m −1 K −1 for Ge 2 Sb 2 Te 3.5 Se 1.5 at 703 K. Therefore, the thermoelectric figure of merit zT increases from 0.24 for Ge 2 Sb 2 Te 5 to 0.41 for Ge 2 Sb 2 Te 3.5 Se 1.5 at 703 K. This study reveals that Se alloying is an effective way to enhance the thermoelectric properties of Ge 2 Sb 2 Te 5 ." @default.
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• W2997264412 date "2019-12-27" @default.
• W2997264412 modified "2023-10-18" @default.
• W2997264412 title "Effective Mass Enhancement and Thermal Conductivity Reduction for Improving the Thermoelectric Properties of Pseudo‐Binary Ge ₂ Sb ₂ Te ₅" @default.
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• W2997264412 doi "https://doi.org/10.1002/andp.201900390" @default.
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